Celestial Atlas
(NGC 4900 - 4949) ←NGC Objects: NGC 4950 - 4999 Link for sharing this page on Facebook→ (NGC 5000 - 5049)
Click here for Introductory Material
QuickLinks:
4950, 4951, 4952, 4953, 4954, 4955, 4956, 4957, 4958, 4959, 4960, 4961, 4962, 4963, 4964, 4965, 4966,
4967, 4968, 4969, 4970, 4971, 4972, 4973, 4974, 4975, 4976, 4977, 4978, 4979, 4980, 4981, 4982, 4983,
4984, 4985, 4986, 4987, 4988, 4989, 4990, 4991, 4992, 4993, 4994, 4995, 4996, 4997, 4998, 4999

Page last updated Sep 6, 2021
Minor modifications of a de Vaucouleurs entry
WORKING 4954 comps, 4955+: Checking 'final' Corwin positions
NEXT: Check Steinicke data, designations (later, compare to Corwin, LEDA, NED, Gottlieb)
Prior last update June 22, 2021 Checked Corwin positions
WORKING: Check identifications (Corwin+), add physical data, add pix/tags

NGC 4950
(= PGC 45294 = ESO 269-047 = MCG -07-27-031)

Discovered (Jun 3, 1834) by
John Herschel
A 14th magnitude lenticular galaxy (type (R)SB(s)0/a?) in Centaurus (RA 13 05 36.5, Dec -43 30 02)
Historical Identification:
Physical information: Based on a recessional velocity of 2795 km/sec, NGC 4950 is about 130 million light years away. Given that and its apparent size of 0.9 by 0.7 arcmins, it is about 35 thousand light years across.
DSS image of region near lenticular galaxy NGC 4950, also showing NGC 4946Above, a 12 arcmin wide DSS image centered on NGC 4950, also showing NGC 4946
Below, a 2.4 arcmin wide DSS image of the galaxy
DSS image of lenticular galaxy NGC 4950

NGC 4951 (= PGC 45246)
Discovered (Apr 17, 1784) by
William Herschel
A 12th magnitude spiral galaxy (type SBc?) in Virgo (RA 13 05 07.7, Dec -06 29 38)
Historical Identification:
Physical information: Apparent size 3.8 by 1.6 arcmin?
Below, a ? arcmin wide image of NGC 4951 (Image Credit & © Carnegie-Irvine Galaxy Survey; used by permission)
Carnegie-Irvine Galaxy Survey image of spiral galaxy NGC 4951

NGC 4952 (=
NGC 4962 = PGC 45233)
Discovered (Mar 13, 1785) by William Herschel (and later listed as NGC 4962)
Discovered (Apr 11, 1785) by William Herschel (and later listed as NGC 4952)
A 12th magnitude elliptical galaxy (type E4?) in Coma Berenices (RA 13 04 58.4, Dec +29 07 20)
Historical Identification:
Physical information: Apparent size 1.8 by 1.1 arcmin?
SDSS image of region near elliptical galaxy NGC 4952
Above, a 12 arcmin wide SDSS image centered on NGC 4952

NGC 4953 (= PGC 45349)
Discovered (Jun 26, 1834) by
John Herschel
A 13th magnitude lenticular? galaxy (type S0/a? pec) in Centaurus (RA 13 06 10.4, Dec -37 35 09)
Historical Identification:
Physical information: Apparent size of extended outer region about 1.2 by 0.75 arcmin, and of the central core about 0.3 by 0.3 arcmin (from the images below) NED S0/a pec, RIDE1 76.2 Mpc, 3K Vr 5233 km/sec
Classification Note: This is either a very disturbed lenticular galaxy, or an equally disturbed spiral galaxy with an exceptionally large, bright core. Only better images can determine which interpretation is correct, so I have just gone with the NED classification.
DSS image of region near lenticular galaxy NGC 4953
Above, a 12 arcmin wide DSS image centered on NGC 4953
Below, a 3 arcmin wide DSS image centered on NGC 4953, also showing PGC 45343, PGC 2801171, "6775357"
Almost everything else in the image is a star, including the "knob" on the northwest rim of NGC 4953
DSS image of region near lenticular galaxy NGC 4953, also showing PGC 43543, PGC 2801171 and 'PGC 6775357'
Below, a 1.2 by 1.5 arcmin wide DSS image of NGC 4953, also showing a couple of the "companions" in the image above
DSS image of lenticular galaxy NGC 4953

PGC 2801171
Not an NGC object but listed here as an apparent companion of
NGC 4953
A magnitude 15(?) lenticular galaxy (type E/S0?) in Centaurus (RA 13 06 07.3, Dec -37 36 04)
Physical Information: LEDA nil; NED S?, B 15.7, 3K Vr 15120 km/sec, z 0.050434311135, so actually a much more distant background galaxy

"PGC 6775357"
(= [S96]ACO_S721_020 (= ABELL S0721:[S96a] 020 = 2MASS J13061228-3735102))

Not an NGC object but listed here as an apparent companion of
NGC 4953
A magnitude ? lenticular galaxy (type ?) in Centaurus (RA 13 06 12.3, Dec -37 35 10)
Note About PGC Designation: Although HyperLEDA assigned a PGC designation to this galaxy, a search of the database for that designation returns no result, so it is shown in quotes. A successful search of HyperLEDA requires the first of the three designations shown below the PGC designation, while NED uses the other designations.
Physical Information: Apparently enveloped in the diffuse material surrounding NGC 4953, but actually a much more distant background galaxy. LEDA 3K Vr 16357 km/sec; NED S?, 3K Vr 16358 km/sec, z 0.05456432039

PGC 45343
Not an NGC object but listed here since sometimes listed as if part of
NGC 4953
A 15th magnitude spiral galaxy (type S??) in Centaurus (RA 13 06 08.2, Dec -37 35 47)
Historical (Mis)identification:
Physical information: Apparent size 0.6 by 0.4 arcmin?

NGC 4954 (=
NGC 4972 = PGC 44988)
Discovered (Nov 22, 1797) by William Herschel (and later listed as NGC 4972)
Discovered (May 5, 1831) by John Herschel (and later listed as NGC 4954)
A 13th magnitude lenticular galaxy (type S(rs?)0/a?) in Draco (RA 13 02 19.9, Dec +75 24 15)
Historical Identification:
Physical information: Apparent size 0.8 by 0.6 arcmin?
Classification Note: This galaxy is apparently universally classified as a lenticular galaxy (type S0), and in the DSS image below that is all that it looks like. However, in a PanSTARRS closeup (not yet posted), it shows definite dust lanes and hints of both an inner ring and some spiral structure, as shown in the description line. But without better images, the two question marks cannot be removed.
DSS image of region near lenticular galaxy NGC 4954
Above, a 12 arcmin wide DSS image centered on NGC 4954

PGC 2767647
Not an NGC object but listed here as an apparent companion of
NGC 4954
A magnitude ? galaxy (type ?) in Draco (RA 13 02 34.8, Dec +75 22 34)
Physical Information:

PGC 2767690
Not an NGC object but listed here as an apparent companion of
NGC 4954
A magnitude ? galaxy (type ?) in Draco (RA 13 02 26.2, Dec +75 23 26)
Physical Information:

PGC 2767790
Not an NGC object but listed here as an apparent companion of
NGC 4954
A magnitude ? galaxy (type ?) in Draco (RA 13 02 00.5, Dec +75 24 41)
Physical Information:

NGC 4955 (= PGC 45340)
Discovered (Mar 30, 1835) by
John Herschel
A 12th magnitude elliptical galaxy (type E2?) in Hydra (RA 13 06 04.8, Dec -29 45 16)
Historical Identification:
Physical information: Apparent size 1.9 by 1.3 arcmin?
Corwin lists an apparent companion (PGC 45351) at RA 13 06 10.9, Dec -29 43 38

NGC 4956 (= PGC 45236)
Discovered (May 1, 1785) by
William Herschel
A 12th magnitude lenticular galaxy (type S0?) in Canes Venatici (RA 13 05 01.0, Dec +35 10 41)
Historical Identification:
Physical information: Apparent size 1.5 by 1.5 arcmin?

NGC 4957 (= PGC 45253)
Discovered (Apr 11, 1785) by
William Herschel
A 13th magnitude elliptical galaxy (type E3?) in Coma Berenices (RA 13 05 12.4, Dec +27 34 11)
Historical Identification:
Physical information: Apparent size 1.2 by 1.0 arcmin?

NGC 4958 (= PGC 45313)
Discovered (Mar 3, 1786) by
William Herschel
An 11th magnitude lenticular galaxy (type SB0?) in Virgo (RA 13 05 48.9, Dec -08 01 13)
Historical Identification:
Physical information: Apparent size 3.9 by 1.4 arcmin?

NGC 4959 (= PGC 45301)
Discovered (Apr 29, 1827) by
John Herschel
A 15th magnitude spiral galaxy (type Sa?) in Canes Venatici (RA 13 05 41.0, Dec +33 10 44)
Historical Identification:
Physical information: Apparent size 0.8 by 0.8 arcmin?

NGC 4960 (=
NGC 4961 = PGC 45311)
Discovered (Apr 11, 1785) by William Herschel (and later listed as NGC 4961)
Discovered (Apr 23, 1865) by Heinrich d'Arrest (and later listed as NGC 4960)
A 14th magnitude spiral galaxy (type SBc?) in Coma Berenices (RA 13 05 47.6, Dec +27 44 03)
Historical Identification:
Physical information: This entry will primarily deal with historical information; for anything else see NGC 4961.

NGC 4961 (=
NGC 4960 = PGC 45311)
Discovered (Apr 11, 1785) by William Herschel (and later listed as NGC 4961)
Discovered (Apr 23, 1865) by Heinrich d'Arrest (and later listed as NGC 4960)
A 14th magnitude spiral galaxy (type SBc?) in Coma Berenices (RA 13 05 47.6, Dec +27 44 03)
Historical Identification:
Physical information: Apparent size 1.6 by 1.1 arcmin?

NGC 4962 (=
NGC 4952 = PGC 45233)
Discovered (Mar 13, 1785) by William Herschel (and later listed as NGC 4962)
Discovered (Apr 11, 1785) by William Herschel (and later listed as NGC 4952)
A 12th magnitude elliptical galaxy (type E4?) in Coma Berenices (RA 13 04 58.4, Dec +29 07 20)
Historical Identification:
Physical information: This entry will primarily contain historical information; for anything else see NGC 4952.

NGC 4963 (= PGC 45315)
Discovered (Apr 9, 1787) by
William Herschel
A 13th magnitude spiral galaxy (type S??) in Canes Venatici (RA 13 05 52.0, Dec +41 43 19)
Historical Identification:
Physical information: Apparent size 0.8 by 0.8 arcmin?

NGC 4964
(= PGC 45278 = UGC 8184 = CGCG 294-011 = MCG +09-22-007)

Discovered (Apr 14, 1789) by
William Herschel
Also observed (May 1, 1831) by John Herschel
A magnitude 13.3 spiral galaxy (type SA(sr)bc?) in Ursa Major (RA 13 05 24.9, Dec +56 19 22)
Historical Identification: Per Dreyer, NGC 4964 (= GC 3403 = JH 1532 = WH III 779, 1860 RA 12 59 28, NPD 32 56.0) is "extremely faint, small, a little extended." The position precesses to RA 13 05 21.7, Dec +56 18 57, about 0.6 arcmin southwest of the galaxy listed above, the description fits and there is nothing else nearby, so the identification is certain.
Physical Information: Based on a recessional velocity relative to the Cosmic Microwave Background radiation of 2660 km/sec (and H0 = 70 km/sec/Mpc), NGC 4964 is about 120 to 125 million light years away. Based on its apparent structure and absolute magnitude (about -20), the galaxy seems typical of "giant" spirals; but given its probable distance and its apparent size of about 1.1 by 0.65 arcmin (from the images below), it is only about 40 thousand light years across, which is on the small side, so it is an unusual object, and probably deserves more attention.
Classification Note: The type listed above was obtained from an expert, but because the image quality isn't all that could be desired, the suggestion of an inner ring can't be considered a certainty, hence the question mark.
SDSS image of region near spiral galaxy NGC 4964
Above, a 12 arcmin wide SDSS image centered on NGC 4964
Below, a 1.2 arcmin wide SDSS image of the galaxy
SDSS image of spiral galaxy NGC 4964

NGC 4965 (= PGC 45437)
Discovered (May 5, 1834) by
John Herschel
A 12th magnitude spiral galaxy (type SBcd?) in Hydra (RA 13 07 09.3, Dec -28 13 42)
Historical Identification:
Physical information: Apparent size 2.4 by 2.0 arcmin?

NGC 4966 (= PGC 45358)
Discovered (Mar 13, 1785) by
William Herschel
A 13th magnitude spiral galaxy (type SBab?) in Coma Berenices (RA 13 06 17.3, Dec +29 03 47)
Historical Identification:
Physical information: Apparent size 1.0 by 0.5 arcmin?
Corwin lists an apparent companion (PGC 1854607) at RA 13 06 14.9, Dec +29 03 53

NGC 4967 (= PGC 45281)
Discovered (Apr 14, 1789) by
William Herschel
A 14th magnitude elliptical galaxy (type E??) in Ursa Major (RA 13 05 36.4, Dec +53 33 51)
Historical Identification:
Physical information: Apparent size 0.5 by 0.4 arcmin?

NGC 4968 (= PGC 45426)
Discovered (Mar 25, 1836) by
John Herschel
A 13th magnitude lenticular galaxy (type SB0?) in Hydra (RA 13 07 06.0, Dec -23 40 36)
Historical Identification:
Physical information: Apparent size 1.9 by 0.9 arcmin?

NGC 4969 (= PGC 45425 + "PGC 3553148" (= SDSSJ130703.47+133813.2))
Discovered (Apr 27, 1887) by
Edward Swift (6-52)
Treated as a pair of galaxies in Virgo (RA 13 07 03.1, Dec +13 38 14)
PGC 45425 = A 14th magnitude lenticular galaxy (type S0?) at RA 13 07 02.8, Dec +13 38 14
"PGC 3553148" = a 15th magnitude lenticular galaxy (type S0?) at RA 13 07 03.5, Dec +13 38 13
Historical Identification:
Physical information: Apparent size of the brighter galaxy 0.7 by 0.6 arcmin? of the companion, 0.3 by 0.3 arcmin? Swift's assessment of the brightness of the object indicates that the brighter component was at the limit of his ability to detect it, so the fainter component was certainly too faint for him to notice, or to affect his observation. But it appears to usually be considered a part of the NGC "object", and is apparently an actual companion of the brighter galaxy, so it seems appropriate to mention it here.
SDSS image of lenticular galaxies NGC 4969 and its fainter companion
Above, a 2.4 arcmin wide closeup of NGC 4969 and its fainter companion

NGC 4970 (=
IC 4196 = PGC 45466)
Discovered (Mar 26, 1789) by William Herschel (and later listed as NGC 4970)
Discovered (Feb 27, 1898) by Lewis Swift (and later listed as IC 4196)
A 12th magnitude lenticular galaxy (type S0?) in Hydra (RA 13 07 33.7, Dec -24 00 31)
Historical Identification:
Physical information: Apparent size 1.8 by 1.0 arcmin?
Corwin lists an apparent companion (PGC 794446) at RA 13 07 36.7, Dec -24 01 27

NGC 4971 (= PGC 45406)
Discovered (Apr 23, 1865) by
Heinrich d'Arrest
A 14th magnitude lenticular galaxy (type SB0?) in Coma Berenices (RA 13 06 55.0, Dec +28 32 53)
Historical Identification:
Physical information: Apparent size 1.0 by 1.0 arcmin?

NGC 4972 (=
NGC 4954 = PGC 44988)
Discovered (Nov 22, 1797) by William Herschel (and later listed as NGC 4972)
Discovered (May 5, 1831) by John Herschel (and later listed as NGC 4954)
A 13th magnitude lenticular galaxy (type S0?) in Draco (RA 13 02 19.9, Dec +75 24 15)
Historical Identification: The second IC lists a corrected position (per Rümker) of RA 12 59 32, NPD 35 33.9 and adds "= Ho. III.19".
Physical information: (This entry will primarily contain historical information; for anything else see NGC 4954.)

NGC 4973 (=
IC 847)
(= PGC 45280 = CGCG 270-049 = CGCG 271-005 = MCG +09-22-006)

Discovered (Apr 14, 1789) by William Herschel (later listed as NGC 4973)
Observed (May 11, 1872) by George Rümker (while listed as WH III 781 and later listed as NGC 4973)
Discovered as Nova (III) 19 (Jun 29, 1900) by Herbert Howe (while listed as IC 847 and NGC 4973)
A 14th magnitude elliptical galaxy (type E0?) in Ursa Major (RA 13 05 32.2, Dec +53 41 07)
Historical Identification: Per Dreyer, NGC 4973 (= GC 3410 = WH III 781, 1860 RA 13 00 18, NPD 35 38.7) is "very faint, small." The second IC lists a corrected position (per Rümker) of RA 12 59 32, NPD 35 33.9 and adds "= Ho. III. 19". The corrected position precesses to RA 13 05 32.7, Dec +53 41 04, barely east of the center of the galaxy listed above and well within its eastern outline, the description fits and there is nothing comparable nearby, so the identification as NGC 4973 is certain.
Discovery Note: Rümker's later observations were not published until 1895, too late to add to the first Index Catalog, so his correction had to wait for the IC2. (Thanks to Wolfgang Steinicke for that information.)
Errors Involving IC 847: Howe's Nova (III) 19 is IC 847, so the IC2 note confirmed the identification of IC 847 as NGC 4973 more than a century ago; but due to the errors discussed in my entry for IC 847, Dreyer did not realize that and mistakenly assigned IC 847 to NGC 4974 (see their entries for more about that).
Physical Information: Apparent size 0.7 by 0.7 arcmin?

NGC 4974
(= PGC 45299 = PGC 45321 = CGCG 270-051 = CGCG 271-007 = MCG +09-22-009)

Discovered (Apr 14, 1789) by
William Herschel (and later listed as NGC 4974)
Observed (May 11, 1872) by George Rümker (while listed as WH III 782 and later listed as NGC 4974)
A 13th magnitude lenticular galaxy (type S0?) in Ursa Major (RA 13 05 55.9, Dec +53 39 33)
Historical Identification: Per Dreyer, NGC 4974 (= GC 3411 = WH III 782, 1860 RA 13 00 32, NPD 35 36.7) is "very faint, small." The second IC lists a corrected position (per Rümker) of RA 12 59 56, NPD 35 35.4 and adds "= I.C. 847." The corrected position precesses to RA 13 05 56.4, Dec +53 39 35, barely east of the center of the galaxy listed above and well within its eastern outline, the description fits and there is nothing comparable nearby, so the identification as NGC 4974 is certain.
Discovery Note: Rümker's later observations were not published until 1895, too late to add to the first Index Catalog, so his correction had to wait for the IC2. (Thanks to Wolfgang Steinicke for that information.)
Errors Involving IC 847: Howe's Nova (III) 19 is IC 847, so the IC2 note for NGC 4973 confirmed the identification of IC 847 as NGC 4973 more than a century ago; but due to the errors discussed in my entry for IC 847, Dreyer did not realize that, and as shown above mistakenly assigned IC 847 to NGC 4974, so considerable confusion about whether IC 847 was NGC 4973 or 4974 persisted for a long time. (See the discusssion of IC 847 for all the gory details.)
Physical Information: Apparent size 1.4 by 1.2 arcmin?

NGC 4975 (= PGC 45492)
Discovered (Feb 19, 1830) by
John Herschel
A 14th magnitude lenticular galaxy (type S0?) in Virgo (RA 13 07 50.2, Dec -05 01 03)
Historical Identification: Per Dreyer, NGC 4975 (= GC 3412 = JH 1534, 1860 RA 13 00 37, NPD 94 17.0) is "very faint, very small, round, pretty suddenly brighter middle."
Physical information: Apparent size 1.1 by 0.7 arcmin?
Corwin lists an apparent companion (PGC 45473) at RA 13 07 35.9, Dec -04 59 27

NGC 4976 (= PGC 45562)
Discovered (Mar 31, 1835) by
John Herschel
A 10th magnitude elliptical galaxy (type E4?) in Centaurus (RA 13 08 37.5, Dec -49 30 22)
Historical Identification: Per Dreyer, NGC 4976 (= GC 3413 = JH 3468, 1860 RA 13 00 40, NPD 138 45.4) is "bright, pretty large, round, gradually much brighter middle."
Physical information: Apparent size 5.6 by 3.0 arcmin?

NGC 4977 (= PGC 45339)
Discovered (Apr 14, 1789) by
William Herschel
A 14th magnitude spiral galaxy (type Sb?) in Ursa Major (RA 13 06 04.4, Dec +55 39 22)
Historical Identification: Per Dreyer, NGC 4977 (= GC 3414, WH III 780, 1860 RA 13 00 42, NPD 33 34.4) is "considerably faint, small."
Physical information: Apparent size 2.0 by 2.0 arcmin?

NGC 4978 (= PGC 45494)
Discovered (Mar 23, 1827) by
John Herschel
A 13th magnitude lenticular galaxy (type S0/a?) in Coma Berenices (RA 13 07 50.5, Dec +18 24 56)
Historical Identification: Per Dreyer, NGC 4978 (= GC 4315 = JH 1535, 1860 RA 13 00 58, NPD 70 50.1) is "faint, very small, round, suddenly brighter middle, stellar."
Physical information: Apparent size 1.5 by 0.8 arcmin?

NGC 4979 (=
IC 4198 = PGC 45484)
Discovered (Apr 10, 1785) by William Herschel (and later listed as NGC 4979)
Discovered (Jun 20, 1895) by Stephane Javelle (and later listed as IC 4198)
A 14th magnitude galaxy (type SB?) in Coma Berenices (RA 13 07 42.8, Dec +24 48 38)
Historical Identification: Per Dreyer, NGC 4979 (= GC 3416 = WH III 346, 1860 RA 13 01 08, NPD 64 29.4) is "extremely faint, pretty large, a little extended."
Physical information: Apparent size 1.0 by 0.7 arcmin?

NGC 4980 (= PGC 45596)
Discovered (Mar 30, 1835) by
John Herschel
A 13th magnitude spiral galaxy (type SBa?) in Hydra (RA 13 09 10.1, Dec -28 38 30)
Historical Identification:
Physical information: Apparent size 1.6 by 0.7 arcmin?

NGC 4981 (= PGC 45574)
Discovered (Apr 17, 1784) by
William Herschel
An 11th magnitude spiral galaxy (type SBbc?) in Virgo (RA 13 08 48.7, Dec -06 46 39)
Historical Identification:
Physical information: Apparent size 2.8 by 1.9 arcmin?

NGC 4982
Recorded (1878) by
Wilhelm Tempel (V)
A group of four stars in Virgo (RA 13 08 46.3, Dec -10 35 20)
Historical Identification:
Physical information:

NGC 4983 (= PGC 45542)
Discovered (Apr 11, 1785) by
William Herschel
A 14th magnitude lenticular galaxy (type SB0/a?) in Coma Berenices (RA 13 08 27.3, Dec +28 19 14)
Historical Identification:
Physical information: Apparent size 1.1 by 0.7 arcmin?

NGC 4984 (= PGC 45585)
Discovered (Feb 8, 1785) by
William Herschel
An 11th magnitude lenticular galaxy (type SB0/a?) in Virgo (RA 13 08 57.2, Dec -15 30 58)
Historical Identification:
Physical information: Apparent size 3.6 by 2.5 arcmin?

NGC 4985 (= PGC 45522)
Discovered (Apr 9, 1787) by
William Herschel
A 14th magnitude lenticular galaxy (type S0?) in Canes Venatici (RA 13 08 12.1, Dec +41 40 35)
Historical Identification:
Physical information: Apparent size 1.3 by 1.2 arcmin?

NGC 4986 (= PGC 45538)
Discovered (May 1, 1785) by
William Herschel
A 13th magnitude spiral galaxy (type SBb?) in Canes Venatici (RA 13 08 24.5, Dec +35 12 23)
Historical Identification:
Physical information: Apparent size 1.7 by 0.9 arcmin?

NGC 4987 (= PGC 45502)
Discovered (Apr 26, 1789) by
William Herschel
A 13th magnitude elliptical galaxy (type E4?) in Canes Venatici (RA 13 07 59.1, Dec +51 55 45)
Historical Identification:
Physical information: Apparent size 1.2 by 0.7 arcmin?

NGC 4988 (= PGC 45671)
Discovered (Jun 3, 1834) by
John Herschel
A 13th magnitude lenticular galaxy (type S0/a?) in Centaurus (RA 13 09 54.4, Dec -43 06 21)
Historical Identification:
Physical information: Apparent size 1.7 by 0.5 arcmin?

NGC 4989 (= PGC 45606)
Discovered (Apr 17, 1784) by
William Herschel
A 13th magnitude lenticular galaxy (type S0?) in Virgo (RA 13 09 16.0, Dec -05 23 47)
Historical Identification:
Physical information: Apparent size 1.6 by 0.9 arcmin?
Corwin lists an apparent companion (PGC 45621) at RA 13 09 17.2, Dec -05 25 10

NGC 4990 (= PGC 45608)
Discovered (Mar 23, 1865) by
Heinrich d'Arrest
A 14th magnitude lenticular galaxy (type S0?) in Virgo (RA 13 09 17.3, Dec -05 16 22)
Historical Identification:
Physical information: Apparent size 1.0 by 0.8 arcmin?

NGC 4991 (= PGC 45604)
Discovered (Apr 30, 1864) by
Albert Marth (246)
A 15th magnitude spiral galaxy (type Sb?) in Virgo (RA 13 09 15.1, Dec +02 20 51)
Historical Identification:
Physical information: Apparent size 0.6 by 0.4 arcmin?

NGC 4992 (= PGC 45593)
Discovered (Apr 4, 1831) by
John Herschel
A 13th magnitude spiral galaxy (type Sa?) in Virgo (RA 13 09 05.6, Dec +11 38 03)
Historical Identification:
Physical information: Apparent size 1.2 by 0.7 arcmin?

Note to Self: Original HST image proves NGC 4993 is larger than shown in the 1.25 arcmin images
Need to widen the field of view and remeasure its size
NGC 4993 (=
NGC 4994 = PGC 45657)
Discovered (Mar 26, 1789) by William Herschel (and later listed as NGC 4993)
Also observed (Mar 25, 1836) by John Herschel (and later listed as NGC 4994)
A magnitude 12.4 lenticular galaxy (type (R)SAB0(rs)a? pec) in Hydra (RA 13 09 47.7, Dec -23 23 02)
Historical Identification: Per Dreyer, NGC 4993 (= GC 3428 = WH III 766, 1860 RA 13 02 12, NPD 112 38.4) is "very faint, very small". The position precesses to RA 13 09 44.8, Dec -23 23 15, only about 0.7 arcmin west southwest of the galaxy listed above, the description fits and there is nothing else nearby, so the identification is certain.
Physical Information: Based on a recessional velocity of 2915 km/sec (and H0 = 70 km/sec/Mpc), NGC 4993 is about 135 million light years away, in good agreement with redshift-independent distance estimates of 115 to 135 million light years (the news release accompanying the HST image uses a distance of about 130 million light years). Given that and its apparent size of about 1.25 by 1.2 arcmin (from the images below), the galaxy is about 50 thousand light years across.
First Gravity Wave Identification: At 8:41 am EDT on August 17, 2017, the first gravitational wave whose source could be identified (by triangulating observations from the LIGO and Virgo gravitational wave detectors) reached the Earth. About 130 million years earlier (the time required for gravitational waves, moving at the speed of light, to cover the distance between NGC 4993 and the Earth) a binary pair of neutron stars collided and merged in the disk of this galaxy, producing the gravitational wave observed on August 17. The collision also produced a "kilonova", as shown in the HST and CTIO images below. Since both light and gravitational waves travel at the speed of light, the light from the kilonova reached the Earth at the same time as the gravitational wave. As soon as the gravitational wave teams determined the position of the source they contacted visible-light astronomical observers, and within 11 hours of the arrival of the gravitational wave, early in the evening of the same day, the light from the kilonova was observed, as shown in the +0.5 day frame of the animated gif.
DSS image of region near lenticular galaxy NGC 4993
Above, a 12 arcmin wide DSS image centered on NGC 4993
Below, a 1.25 arcmin wide DSS image of the galaxy
DSS image of lenticular galaxy NGC 4993
Below, a 1.25 arcmin wide PanSTARRS image of the galaxy
PanSTARRS image of lenticular galaxy NGC 4993
Below, a 1.25 arcmin wide HST image of the galaxy (Image Credit NASA and ESA)
HST image of lenticular galaxy NGC 4993
Below, a 1.25 arcmin wide image of the galaxy, showing images of the "kilonova" discussed above
(North is 21.5 degrees to the left of up; Image Credit NASA and ESA Acknowledgment: A.J. Levan (U. Warwick), N.R. Tanvir (U. Leicester), and A. Fruchter and O. Fox (STScI))
HST image of lenticular galaxy NGC 4993
Below, a 4.5 by 3.4 arcmin wide animated.gif of the kilonova (Image Credit P.S. Cowperthwaite / E. Berger / CfA)
Animated CTIO image of the kilonova in lenticular galaxy NGC 4993

NGC 4994 (=
NGC 4993 = PGC 45657)
Discovered (Mar 26, 1789) by William Herschel (and later listed as NGC 4993)
Also observed (Mar 25, 1836) by John Herschel (and later listed as NGC 4994)
A magnitude 12.4 lenticular galaxy (type (R)SAB0(rs)a? pec) in Hydra (RA 13 09 47.7, Dec -23 23 02)
Historical Identification: Per Dreyer, NGC 4994 (= GC 3429 = JH 3471, 1860 RA 13 02 16, NPD 111 48.1) is "pretty faint, considerably small, round, suddenly a little brighter middle, among stars". The position precesses to RA 13 09 48.0, Dec -22 32 57, but there is nothing there nor anywhere near there. However, as noted by Corwin, the right ascension is essentially the same as for William Herschel's III 766 (= NGC 4993), and if John Herschel's NPD for NGC 4994 is changed to 112 38.1 (a sort of "single-digit" error, in that the last digit for degrees is too low by 1, and the first digit for arcmin is too high by the same amount), the position precesses to RA 13 09 48.9, Dec -23 22 57, which lies on the eastern rim of the galaxy listed above. The Herschels' descriptions are sufficiently similar that if the positions were the same there would be no doubt that they belong to the same object, and although the error in the NPD is unusual it is not at all rare, so the equality of NGC 4993 and 4994 is considered certain.
Physical Information: Given the duplicate entry, see NGC 4993 for anything else.

NGC 4995 (= PGC 45643)
Discovered (Apr 25, 1784) by
William Herschel
An 11th magnitude spiral galaxy (type SBb?) in Virgo (RA 13 09 40.6, Dec -07 50 00)
Historical Identification:
Physical information: Apparent size 2.4 by 1.7 arcmin?
Use By The de Vaucouleurs Atlas: NGC 4995 is used by the de Vaucouleurs Atlas of Galaxies as an example of type SAB(rs)b.
Corwin notes an apparent companion (PGC 1011507) at RA 13 09 42.2, Dec -07 53 07
and another (PGC 1012245) at RA 13 09 33.3, Dec -07 50 14

NGC 4996 (= PGC 45629)
Discovered (Mar 28, 1864) by
Albert Marth (247)
A 13th magnitude lenticular galaxy (type SB0/a?) in Virgo (RA 13 09 31.9, Dec +00 51 25)
Historical Identification:
Physical information: Apparent size 1.8 by 1.4 arcmin?

NGC 4997 (= PGC 45667)
Discovered (Mar 28, 1878) by
Sherburne Burnham
A 13th magnitude lenticular galaxy (type E/S0?) in Virgo (RA 13 09 51.7, Dec -16 30 56)
Historical Identification:
Physical information: Apparent size 1.4 by 0.9 arcmin?

NGC 4998 (= PGC 45537)
Discovered (Apr 26, 1789) by
William Herschel
A 15th magnitude spiral galaxy (type Sc?) in Canes Venatici (RA 13 08 10.2, Dec +50 39 49)
Historical Identification:
Physical information: Apparent size 0.9 by 0.8 arcmin?
Corwin notes an apparent companion (PGC 2379269) at RA 13 08 13.8, Dec +50 40 00
and another (SDSS J130814.18+504044.9) at RA 13 08 14.2, Dec +50 40 45
and another (PGC 2378954) at RA 13 08 10.3, Dec +50 39 14

NGC 4999 (= PGC 45632)
Discovered (Feb 24, 1786) by
William Herschel
A 12th magnitude spiral galaxy (type SBb?) in Virgo (RA 13 09 33.1, Dec +01 40 23)
Historical Identification:
Physical information: Apparent size 2.3 by 1.9 arcmin?
SDSS image of spiral galaxy NGC 4999
Above, a 2.4 arcmin wide closeup of NGC 4999
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy NGC 4999
Celestial Atlas
(NGC 4900 - 4949) ←NGC Objects: NGC 4950 - 4999→ (NGC 5000 - 5049)