Celestial Atlas
(IC 4100 - 4149) ←     IC Objects: IC 4150 - 4199 Link for sharing this page on Facebook     → (IC 4200 - 4249)
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4150, 4151, 4152, 4153, 4154, 4155, 4156, 4157, 4158, 4159, 4160, 4161, 4162, 4163, 4164, 4165, 4166,
4167, 4168, 4169, 4170, 4171, 4172, 4173, 4174, 4175, 4176, 4177, 4178, 4179, 4180, 4181, 4182, 4183,
4184, 4185, 4186, 4187, 4188, 4189, 4190, 4191, 4192, 4193, 4194, 4195, 4196, 4197, 4198, 4199

Page last updated Nov 15, 2013
WORKING: Check positions, historical IDs (Corwin+), add basic pix, captions, tags

IC 4150
Recorded (Jan 27, 1904) by
Max Wolf (6-188)
A magnitude 17(?) star in Coma Berenices (RA 13 04 13.1, Dec +21 59 14)
SDSS image of region near the star listed as IC 4150
Above, a 12 arcmin wide SDSS image centered on the star listed as IC 4150

IC 4151 (= PGC 2088237 + PGC 4581621 + PGC 4581622)
Discovered (Mar 21, 1903) by
Max Wolf (5-203)
A group of galaxies in Canes Venatici
PGC 2088237 = A magnitude 17(?) spiral galaxy (type Sa?) at RA 13 03 59.0, Dec 36 51 23
PGC 4581622 = A magnitude 16(?) lenticular galaxy (type S0/a? pec) at RA 13 03 59.1, Dec +36 51 29
PGC 4581621 = A magnitude 17(?) spiral galaxy (type S? pec) at RA 13 03 59.3, Dec +36 51 30
PGC 4571622 has a recessional velocity of 21870 km/sec, and PGC 4581621 of 21730 km/sec, suggesting that they are at about the same distance. The recessional velocity of PGC 2088237 is unknown, but based on its apparent interaction with the other pair, it is probably at about the same distance as well. Based on an average recessional velocity of 21800 km/sec, a straightforward calculation indicates that IC 4151 is about 1015 million light years away. However, for objects at such distances we should take into account the Universal expansion during the time it took their light to reach us. Doing that shows that the group was about 935 million light years away at the time the light by which we see it was emitted, about 970 million years ago (the difference between the two numbers being due to the expansion of the intervening space during the light-travel time). Given that and its apparent size of about 0.25 by 0.15 arcmin, PGC 2088237 is about 70 thousand light years across, PGC 4581622's apparent size of about 0.15 by 0.1 arcmin indicates that it is about 40 thousand light years across, and PGC 4581621's apparent size of about 0.2 by 0.1 arcmin indicates that it is about 55 thousand light years across. The overall size of the system, which covers about 0.35 by 0.2 arcmin, is about 95 thousand light years.
DSS image of PGC 2088237, PGC 4581622 and PGC 4581621, which comprise IC 4151
Above, a 0.5 arcmin wide SDSS image of IC 4151
Below, a 12 arcmin wide SDSS image centered on the group, also showing IC 4144
SDSS image of region near IC 4151, also showing IC 4144

IC 4152 (= PGC 3088215)
Discovered (Mar 21, 1903) by
Max Wolf (5-204)
A magnitude 15.2 lenticular galaxy (type S0/a?) in Canes Venatici (RA 13 03 58.5, Dec +38 11 57)
Apparent size 0.3 by 0.3 arcmin?

IC 4153
Recorded (Jan 27, 1904) by
Max Wolf (6-189)
A star in Coma Berenices (RA 13 04 26.5, Dec +19 02 40)

IC 4154 (= PGC 1689776)
Discovered (Jan 27, 1904) by
Max Wolf (6-190)
A magnitude 15.0 elliptical galaxy (type E0??) in Coma Berenices (RA 13 04 28.3, Dec +23 34 30)
Apparent size 0.3 by 0.3 arcmin?

IC 4155
Discovered (Mar 21, 1903) by
Max Wolf (5-205)
A star in Canes Venatici (RA 13 04 08.9, Dec +40 00 54)

IC 4156 (probably =
NGC 4948 = PGC 45224)
Discovered (May 25, 1887) by Lewis Swift (and later listed as NGC 4948)
Discovered (July 1899) by DeLisle Stewart (369) (and later listed as IC 4156)
If NGC 4948 = A magnitude 13.2 spiral galaxy (type SB(s)dm?) in Virgo (RA 13 04 55.8, Dec -07 56 47)
This entry will contain only historical information; for now, see NGC 4948 for anything else.

IC 4157
Discovered (Mar 21, 1903) by
Max Wolf (5-206)
A star in Canes Venatici (RA 13 04 18.4, Dec +38 39 56)

IC 4158 (= PGC 2081347)
Discovered (Mar 21, 1903) by
Max Wolf (5-207)
A magnitude 14.8 lenticular galaxy (type S0??) in Canes Venatici (RA 13 04 24.6, Dec +36 28 50)
Apparent size 0.5 by 0.2 arcmin?

IC 4159 (= PGC 1666258)
Discovered (Jan 27, 1904) by
Max Wolf (6-191)
A magnitude 15.7 spiral galaxy (type Sc? pec) in Coma Berenices (RA 13 04 45.9, Dec +22 14 30)
Apparent size 0.3 by 0.25 arcmin.
SDSS image of spiral galaxy IC 4159
Above, a 0.4 arcmin wide SDSS image of IC 4159
Below, a 12 arcmin wide SDSS image centered on the galaxy
SDSS image of region near spiral galaxy IC 4159

IC 4160 (= PGC 1677859)
Discovered (Jan 27, 1904) by
Max Wolf (6-192)
A magnitude 16.5 spiral galaxy (type S??) in Coma Berenices (RA 13 04 48.0, Dec +22 53 35)
Apparent size 0.4 by 0.2 arcmin?

IC 4161 (= PGC 2158676)
Discovered (Mar 21, 1903) by
Max Wolf (5-208)
A magnitude 15.0 lenticular galaxy (type S0??) in Canes Venatici (RA 13 04 35.2, Dec +39 58 39)
Apparent size 0.5 by 0.1 arcmin?

IC 4162 (= PGC 1630533)
Discovered (Jan 27, 1904) by
Max Wolf (6-193)
A magnitude 15.0 elliptical galaxy (type E0??) in Coma Berenices (RA 13 05 03.0, Dec +20 33 16)
Apparent size 0.3 by 0.3 arcmin?

IC 4163 (= PGC 1635544)
Discovered (Jan 27, 1904) by
Max Wolf (6-194)
A magnitude 15.8 spiral galaxy (type Sab? pec?) in Coma Berenices (RA 13 05 07.9, Dec +20 46 16)
Apparent size 0.35 by 0.3 arcmin. A starburst galaxy?
SDSS image of spiral galaxy IC 4163
Above, a 0.5 arcmin wide SDSS image of IC 4163
Below, a 12 arcmin wide SDSS image centered on the galaxy
SDSS image of region near spiral galaxy IC 4163

IC 4164 (= PGC 1630316)
Discovered (Jan 27, 1904) by
Max Wolf (6-195)
A magnitude 15.2 spiral galaxy (type S??) in Coma Berenices (RA 13 05 14.5, Dec +20 32 49)
Apparent size 0.3 by 0.1 arcmin?

IC 4165 (= PGC 45223)
Discovered (Mar 21, 1903) by
Max Wolf (5-209)
A magnitude 14.8 spiral galaxy (type Sc??) in Canes Venatici (RA 13 04 57.1, Dec +39 55 29)
Apparent size 0.7 by 0.7 arcmin?

IC 4166 (= PGC 45264)
Discovered (Jun 26, 1903) by
Stephane Javelle (1234)
A magnitude 14.3 spiral galaxy (type SBab(rs)? pec) in Canes Venatici (RA 13 05 18.7, Dec +31 26 31)
Apparent size 0.9 by 0.45 arcmin.
SDSS image of spiral galaxy IC 4166
Above, a 1.2 arcmin wide SDSS image of IC 4166
Below, a 12 arcmin wide SDSS image centered on the galaxy
SDSS image of region near spiral galaxy IC 4166

IC 4167 (= PGC 1659732)
Discovered (Jan 27, 1904) by
Max Wolf (6-197)
A magnitude 16.5 elliptical galaxy (type E3??) in Coma Berenices (RA 13 05 30.7, Dec +21 54 38)
Apparent size 0.3 by 0.2 arcmin?

IC 4168 (= PGC 45244)
Discovered (Mar 21, 1903) by
Max Wolf (5-210)
A magnitude 15.2 spiral galaxy (type S??) in Canes Venatici (RA 13 05 10.8, Dec +40 02 59)
Apparent size 0.4 by 0.4 arcmin?

IC 4169 (= PGC 3802029)
Discovered (Mar 21, 1903) by
Max Wolf (5-211)
A magnitude 15.0 lenticular galaxy (type S0?) in Canes Venatici (RA 13 05 12.5, Dec +38 46 25)
Apparent size 0.2 by 0.2 arcmin?

IC 4170 (= PGC 45290 + PGC 45287)
Discovered (Jan 27, 1904) by
Max Wolf
A pair of galaxies in Coma Berenices
PGC 45290 = A magnitude 16(?) lenticular galaxy (type S0/a?) at RA 13 05 35.0, Dec +21 08 03
PGC 45287 = A magnitude 17(?) lenticular galaxy (type E/S0?) at RA 13 05 34.8, Dec +21 08 09
Per Dreyer, IC 4170 (= Wolf list VI #198, 1860 RA 12 58 45, NPD 68 06.9) is "faint, very small, irregular figure, nuclear". The position precesses to RA 13 05 35.5, Dec +21 08 02, right on the brightest member of a triplet of galaxies. Per Corwin, a print of Wolf's plate shows a single merged image corresponding to the northern pair, but the southermost member (PGC 4538241) does not appear to have contributed to the image, probably being too faint to register on the plate; so the IC entry corresponds to the pair listed above. Apparent size of PGC 45290 is about 0.5 by 0.25 arcmin; of PGC 45287, about 0.2 by 0.2 arcmin. The recessional velocity of PGC 45290 is 22035 km/sec, while that of PGC 45287 is 19085 km/sec. The large difference in recessional velocities means that they are probably an optical double, and not a physical pair.
SDSS image of lenticular galaxies PGC 45287 and PGC 45290, which comprise IC 4170, and their apparent companion, spiral galaxy PGC 4538241
Above, a 0.8 arcmin wide SDSS image of IC 4170 and PGC 4538241
Below, a 12 arcmin wide SDSS image centered on the grouping
SDSS image of region near IC 4170

PGC 4538241 (misidentified by NED as PGC 45290)
Not an IC object but listed here due to its apparent proximity to
IC 4170
A magnitude 18(?) spiral galaxy (type SBb? pec) in Coma Berenices (RA 13 05 35.3, Dec +21 07 47)
As noted in the entry for IC 4170 (which see for images), an apparent companion to that pair, but probably too faint to deserve inclusion as part of the IC entry. Apparent size 0.2 by 0.15 arcmin. Recessional velocity unknown, so whether it is connected to either member of IC 4170 or merely an optical companion is also unknown.

IC 4171 (= PGC 45265)
Discovered (Mar 21, 1903) by
Max Wolf (5-212)
A magnitude 13.8 spiral galaxy (type Scd??) in Canes Venatici (RA 13 05 18.8, Dec +36 06 09)
Apparent size 0.9 by 0.5 arcmin?

IC 4172 (= PGC 45379)
Discovered (Jan 27, 1904) by
Max Wolf (6-199)
A magnitude 15.7 spiral galaxy (type S??) in Coma Berenices (RA 13 06 33.2, Dec +22 51 02)
Apparent size 0.4 by 0.3 arcmin?

IC 4173 (= PGC 45142, and with
NGC 4933 = Arp 176)
Discovered (Apr 16, 1895) by Guillaume Bigourdan (315)
A magnitude 14.2 elliptical galaxy (type E2?? pec) in Virgo (RA 13 03 54.5, Dec -11 30 18)
Apparent size 0.6 by 0.5 arcmin? Sometimes referred to as NGC 4933B, because interacting with NGC 4933 (which see for images), with which it is listed as Arp 176 (as an example of a galaxy with a counter-tail). However, NGC 4933A and 4933B are often used iterchangeably for the two galaxies, so the use of either term only serves to confuse the situation, and neither galaxy should ever be referred to by the NGC 4933 "A" or "B" designation.

IC 4174
Recorded (Mar 21, 1903) by
Max Wolf (5-213)
A star in Canes Venatici (RA 13 05 28.7, Dec +36 23 56)

IC 4175 (= PGC 1625424)
Discovered (Jan 27, 1904) by
Max Wolf (6-200)
A magnitude 15.5 spiral galaxy (type S??) in Coma Berenices (RA 13 05 47.4, Dec +20 22 27)
Apparent size 0.4 by 0.3 arcmin?

IC 4176 (=
NGC 4933 = PGC 45146, and with IC 4173 = Arp 176)
Discovered (May 9, 1784) by William Herschel (and later listed as NGC 4933)
Discovered (Apr 16, 1895) by Guillaume Bigourdan (316) (and later listed as IC 4176)
A magnitude 11.7 lenticular galaxy (type S0/a? pec) in Virgo (RA 13 03 56.7, Dec -11 29 51)
This entry will only contain historical information; for anything else, see NGC 4933.

IC 4177 (= PGC 45365)
Discovered (July 1899) by
DeLisle Stewart (370)
A magnitude 14.3 spiral galaxy (type Sbc??) in Virgo (RA 13 06 29.0, Dec -13 34 16
Apparent size 0.9 by 0.4 arcmin?

IC 4178 (= PGC 45306)
Discovered (Mar 21, 1903) by
Max Wolf (5-214)
A magnitude 15.1 irregular galaxy (type IBm?) in Canes Venatici (RA 13 05 41.6, Dec +36 01 03)
Apparent size 1.1 by 0.3 arcmin.
SDSS image of irregular galaxy IC 4178
Above, a 1.2 arcmin wide SDSS image of IC 4178
Below, a 12 arcmin wide SDSS image centered on the galaxy, also showing IC 4171 and 4189
SDSS image of region near irregular galaxy IC 4178, also showing IC 4171 and IC 4189

IC 4179
Recorded (Mar 21, 1903) by
Max Wolf (5-215)
A star in Canes Venatici (RA 13 05 45.8, Dec +37 11 55)

IC 4180 (= PGC 45408)
Discovered (Feb 27, 1898) by
Lewis Swift (XI-148)
A magnitude 12.7 lenticular galaxy (type SB0/a??) in Hydra (RA 13 06 56.5, Dec -23 55 02)
Apparent size 0.9 by 0.7 arcmin?

IC 4181 (= PGC 140073)
Discovered (Jan 27, 1904) by
Max Wolf (6-201)
A magnitude 15.4 spiral galaxy (type S??) in Coma Berenices (RA 13 06 06.4, Dec +21 29 38)
Apparent size 0.4 by 0.4 arcmin?

IC 4182 (= PGC 45314)
Discovered (Mar 21, 1903) by
Max Wolf (5-216)
A magnitude 11.1 spiral galaxy (type SA(s)m) in Canes Venatici (RA 13 05 49.3, Dec +37 36 23)
Apparent size 4.5 by 3.7 arcmin.
SDSS image of spiral galaxy IC 4182
Above, a 6 arcmin wide SDSS image of IC 4182
Below, a NOAO 'true-color' image of the galaxy (Image Credits: G.J. Jacoby, M.J. Pierce/NOAO/AURA/NSF)
NOAO image of spiral galaxy IC 4182
Below, a false-color NOAO image emphasizes star-forming regions
(Image Credits: G.J. Jacoby, M.J. Pierce/NOAO/AURA/NSF)
NOAO false-color image of spiral galaxy IC 4182
Below, a 12 arcmin wide SDSS image centered on the galaxy
SDSS image of region near spiral galaxy IC 4182

IC 4183 (= PGC 3089889)
Discovered (Jan 27, 1904) by
Max Wolf (6-202)
A magnitude 16.2 elliptical galaxy (type E0??) in Coma Berenices (RA 13 06 11.5, Dec +21 30 17)
Apparent size 0.3 by 0.3 arcmin?

IC 4184 (= PGC 3088122)
Discovered (Mar 21, 1903) by
Max Wolf (5-217)
A magnitude 14.5 lenticular galaxy (type S0??) in Canes Venatici (RA 13 05 51.7, Dec +38 50 16)
Apparent size 0.4 by 0.3 arcmin?

IC 4185 (= PGC 1656882)
Discovered (Jan 27, 1904) by
Max Wolf (6-203)
A magnitude 15.7 lenticular galaxy (type SB0/a?) in Coma Berenices (RA 13 06 12.5, Dec +21 46 11)
Apparent size 0.6 by 0.2 arcmin? Its companion (PGC 4662833) was also seen by Wolf but identified by him as a star, so probably only PGC 1656882 should be considered part of IC 4185; but since he did see both objects and they do appear to be physical companions, some references treat both galaxies as part of the IC object.
SDSS image of lenticular galaxy IC 4185, also showing lenticular galaxy PGC 4662833, which is sometimes considered part of the IC object
Above, a 1.0 arcmin wide SDSS image of IC 4185 and PGC 4662833
Below, a 12 arcmin wide SDSS image centered on the pair
SDSS image of region near lenticular galaxy IC 4185, also showing lenticular galaxy PGC 4662833, which is sometimes considered part of the IC object

PGC 4662833
Not always, but sometimes considered part of
IC 4185 (which see)
A magnitude 17(?) lenticular galaxy (type S0/a?) in Coma Berenices (RA 13 06 12.7, Dec +21 46 33)
Apparent size 0.2 by 0.2 arcmin? (For images and a discussion of its status, see IC 4185.)

IC 4186
Recorded (Mar 21, 1903) by
Max Wolf (5-218)
A pair of stars in Canes Venatici (RA 13 05 57.8, Dec +36 59 07)

IC 4187 (= PGC 45333)
Discovered (Mar 21, 1903) by
Max Wolf (5-219)
A magnitude 14.9 lenticular galaxy (type E/S0??) in Canes Venatici (RA 13 05 59.7, Dec +36 17 54)
Apparent size 0.3 by 0.3 arcmin?

IC 4188 (= PGC 45332)
Discovered (Mar 21, 1903) by
Max Wolf (5-220)
A magnitude 15.7 spiral galaxy (type SBbc? pec) in Canes Venatici (RA 13 06 02.5, Dec +36 19 38)
Apparent size 0.75 by 0.35 arcmin.
SDSS image of spiral galaxy IC 4188
Above, a 0.8 arcmin wide SDSS image of IC 4188
Below, a 12 arcmin wide SDSS image centered on the galaxy, also showing IC 4187
SDSS image of region near spiral galaxy IC 4188, also showing IC 4187

IC 4189 (= PGC 45336)
Discovered (Mar 21, 1903) by
Max Wolf (5-221)
A magnitude 13.5 spiral galaxy (type Sc??) in Canes Venatici (RA 13 06 03.7, Dec +35 58 48)
Apparent size 1.3 by 0.9 arcmin?

IC 4190
Recorded (Mar 21, 1903) by
Max Wolf (5-222)
A star in Canes Venatici (RA 13 06 06.2, Dec +37 36 50)

IC 4191
Discovered (1907) by
Williamina Fleming (107)
A magnitude 10.6 planetary nebula in Musca (RA 13 08 47.5, Dec -67 38 35)
Apparent size 0.08 arcmin?

IC 4192
Recorded (Mar 21, 1903) by
Max Wolf (5-223)
A lost or nonexistent object in Canes Venatici (RA 13 06 08.5, Dec +37 36 19)

IC 4193 (= PGC 45342)
Discovered (Mar 21, 1903) by
Max Wolf (5-224)
A magnitude 14.6 elliptical galaxy (type E4??) in Canes Venatici (RA 13 06 06.2, Dec +39 25 24)
Apparent size 0.5 by 0.3 arcmin?

IC 4194
Recorded (Mar 21, 1903) by
Max Wolf (5-225)
A star in Canes Venatici (RA 13 06 07.8, Dec +38 52 24)

IC 4195
Recorded (Mar 21, 1903) by
Max Wolf (5-226)
A star in Canes Venatici (RA 13 06 15.6, Dec +37 02 17)

IC 4196 (=
NGC 4970 = PGC 45466)
Discovered (Mar 26, 1789) by William Herschel (and later listed as NGC 4970)
Discovered (Feb 27, 1898) by Lewis Swift (XI-149) (and later listed as IC 4196)
A magnitude 12.2 lenticular galaxy (type S0??) in Hydra (RA 13 07 33.6, Dec -24 00 32)
This entry will primarily contain historical information; for anything else see NGC 4970.

IC 4197 (= PGC 45514)
Discovered (Feb 27, 1898) by
Lewis Swift (XI-150)
A magnitude 12.4 lenticular galaxy (type SAB0?) in Hydra (RA 13 08 04.3, Dec -23 47 49)
Apparent size 1.9 by 1.0 arcmin.
DSS image of lenticular galaxy IC 4197
Above, a 2.4 arcmin wide DSS image of IC 4197
Below, a 12 arcmin wide DSS image centered on the galaxy
DSS image of region near lenticular galaxy IC 4197

IC 4198(=
NGC 4979 = PGC 45484)
Discovered (Apr 10, 1785) by William Herschel (and later listed as NGC 4979)
Discovered (Jun 20, 1895) by Stephane Javelle (1235) (and later listed as IC 4198)
A magnitude 13.9 galaxy (type SBb??) in Coma Berenices (RA 13 07 42.8, Dec +24 48 40)
This entry will primarily contain historical information; for anything else see NGC 4979.

IC 4199
Recorded (Mar 21, 1903) by
Max Wolf (5-227)
A star in Canes Venatici (RA 13 07 32.7, Dec +35 51 29)
Celestial Atlas
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