Celestial Atlas
(IC 2400 - 2449) ←     IC Objects: IC 2450 - 2499 Link for sharing this page on Facebook     → (IC 2500 - 2549)
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Page last updated Oct 14, 2013
WORKING: Check positions, historical IDs (Corwin+), add basic pix, captions, tags

IC 2450 (= PGC 26218)
Discovered (Apr 9, 1896) by
Stephane Javelle (1082)
A magnitude 12.8 lenticular galaxy (type S0/a? pec) in Cancer (RA 09 17 05.5, Dec +25 25 40)
Based on a recessional velocity of 1645 km/sec, IC 2450 is about 75 million light years away. Given that and its apparent size of 1.4 by 0.75 arcmin, it is about 30 thousand light years across. A starburst galaxy?
SDSS image of lenticular galaxy IC 2450
Above, a 2.4 arcmin wide SDSS image of IC 2450
Below, a 12 arcmin wide SDSS image centered on the galaxy
SDSS image of region near lenticular galaxy IC 2450

IC 2451 (= PGC 26119)
Discovered (Apr 6, 1896) by
Stephane Javelle (1083)
A magnitude 14.5 elliptical galaxy (type E0??) in Cancer (RA 09 15 47.7, Dec +23 29 49)
Apparent size 0.4 by 0.4 arcmin?

IC 2452 (= PGC 26129)
Discovered (Apr 6, 1896) by
Stephane Javelle (1084)
A magnitude 14.6 spiral galaxy (type S??) in Cancer (RA 09 15 57.5, Dec +23 28 22)
Apparent size 0.4 by 0.2 arcmin?

IC 2453 (= PGC 26131)
Discovered (Apr 9, 1896) by
Stephane Javelle (1085)
A magnitude 14.6 spiral galaxy (type S??) in Cancer (RA 09 15 54.5, Dec +20 55 46)
Apparent size 0.5 by 0.3 arcmin?

IC 2454 (= PGC 26139)
Discovered (Jan 9, 1900) by
Stephane Javelle (1086)
A magnitude 13.2 spiral galaxy (type Sa??) in Cancer (RA 09 16 01.7, Dec +17 49 17)
Apparent size 0.9 by 0.6 arcmin?

IC 2455 (=
NGC 2804 = PGC 26196)
Discovered (Feb 24, 1827) by John Herschel (and later listed as NGC 2804)
Discovered (Apr 9, 1896) by Stephane Javelle (1087) (and later listed as IC 2455)
A magnitude 12.8 lenticular galaxy (type S0??) in Cancer (RA 09 16 49.9, Dec +20 11 54)
This entry will be primarily concerned with historical information; for anything else see NGC 2804.

IC 2456 (= PGC 3088630)
Discovered (Apr 25, 1903) by
Stephane Javelle (1088)
A magnitude 14.8 spiral galaxy (type S??) in Lynx (RA 09 17 24.3, Dec +34 40 29)
Apparent size 0.5 by 0.3 arcmin?

IC 2457 (= PGC 1616119)
Discovered (Apr 9, 1896) by
Stephane Javelle (1089)
A magnitude 15.0 spiral galaxy (type S??) in Cancer (RA 09 17 04.2, Dec +20 05 37)
Apparent size 0.5 by 0.3 arcmin?

IC 2458 (= PGC 26485 = "NGC 2820A")
Discovered (Mar 14, 1899) by
Guillaume Bigourdan (397)
A magnitude 14.5 lenticular galaxy (type S0/a??) in Ursa Major (RA 09 21 30.2, Dec +64 14 18)
Apparent size 0.5 by 0.2 arcmin? Sometimes needlessly renamed NGC 2820A due to its proximity to NGC 2820.

IC 2459 (= PGC 2055725)
Discovered (Apr 25, 1903) by
Stephane Javelle (1090)
A magnitude 14.7 elliptical galaxy (type E3??) in Lynx (RA 09 18 59.4, Dec +34 51 46)
Apparent size 0.4 by 0.3 arcmin?

IC 2460 (=
NGC 2827 = PGC 26342)
Discovered (Mar 13, 1850) by George Stoney (and later listed as NGC 2827)
Discovered (Feb 28, 1900) by Stephane Javelle (1091) (and later listed as IC 2460)
A magnitude 14.8 spiral galaxy (type Sb??) in Lynx (RA 09 19 18.9, Dec +33 52 51)
This entry will be primarily concerned with historical information; for anything else see NGC 2827.

IC 2461 (= PGC 26390)
Discovered (Apr 2, 1900) by
Stephane Javelle (1092)
A magnitude 14.0 spiral galaxy (type Sb??) in Lynx (RA 09 19 58.0, Dec +37 11 27)
Apparent size 2.3 by 0.4 arcmin?

IC 2462 (= PGC 1674360)
Discovered (Apr 14, 1896) by
Stephane Javelle (1093)
A magnitude 15.0 spiral galaxy (type S??) in Leo (RA 09 22 56.3, Dec +22 41 10)
Apparent size 0.6 by 0.3 arcmin?

IC 2463 (= PGC 26557)
Discovered (Apr 14, 1896) by
Stephane Javelle (1094)
A magnitude 14.5 lenticular galaxy (type S0/(rs)a?) in Leo (RA 09 23 00.2, Dec +22 37 09)
Apparent size 0.55 by 0.45 arcmin.
SDSS image of lenticular galaxy IC 2463
Above, a 1.2 arcmin wide SDSS image of IC 2463
Below, a 12 arcmin wide SDSS image centered on the galaxy, also showing IC 2464
SDSS image of region near lenticular galaxy IC 2463, also showing IC 2464

IC 2464 (= PGC 26585)
Discovered (Apr 14, 1896) by
Stephane Javelle (1095)
A magnitude 14.5 spiral galaxy (type S??) in Leo (RA 09 23 22.2, Dec +22 37 49)
Apparent size 0.7 by 0.6 arcmin?

IC 2465 (= PGC 3084878)
Discovered (Apr 22, 1897) by
Stephane Javelle (1096)
A magnitude 14.5 spiral galaxy (type S??) in Leo (RA 09 23 31.5, Dec +24 26 46)
Apparent size 0.9 by 0.5 arcmin?

IC 2466 (= PGC 26629)
Discovered (Apr 22, 1897) by
Stephane Javelle (1097)
A magnitude 14.5 spiral galaxy (type S??) in Leo (RA 09 23 44.8, Dec +24 31 05)
Apparent size 0.9 by 0.7 arcmin?

IC 2467 (= PGC 26683)
Discovered (Mar 1, 1900) by
Stephane Javelle (1098)
A magnitude 14.0 spiral galaxy (type S??) in Leo Minor (RA 09 24 52.7, Dec +38 21 06)
Apparent size 0.7 by 0.7 arcmin?

IC 2468 (= PGC 26691)
Discovered (Mar 1, 1900) by
Stephane Javelle (1099)
A magnitude 15.1 spiral galaxy (type S??) in Leo Minor (RA 09 25 01.5, Dec +38 20 39)
Apparent size 0.4 by 0.4 arcmin?

IC 2469 (= PGC 26561)
Discovered (Dec 28, 1897) by
Lewis Swift (XI-93)
A magnitude 11.1 spiral galaxy (type SBab??) in Pyxis (RA 09 23 01.4, Dec -32 26 59)
Apparent size 4.7 by 1.0 arcmin?

IC 2470 (= PGC 26730)
Discovered (Apr 14, 1896) by
Stephane Javelle (1100)
A magnitude 14.7 spiral galaxy (type S??) in Leo (RA 09 25 41.2, Dec +23 21 41)
Apparent size 0.7 by 0.7 arcmin?

IC 2471 (= PGC 26707)
Discovered (Mar 5, 1899) by
Guillaume Bigourdan (398)
A magnitude 13.7 lenticular galaxy (type S0??) in Hydra (RA 09 25 12.2, Dec -06 49 48)
Apparent size 1.1 by 0.7 arcmin?

IC 2472 (= PGC 26779)
Discovered (Apr 14, 1896) by
Stephane Javelle (1101)
A magnitude 14.7 spiral galaxy (type S??) in Leo (RA 09 26 33.5, Dec +21 23 06)
Apparent size 0.5 by 0.3 arcmin?

IC 2473 (= PGC 26817)
Discovered (Apr 14, 1896) by
Stephane Javelle (1102)
A magnitude 13.0 spiral galaxy (type SBbc??) in Leo (RA 09 27 23.4, Dec +30 26 29)
Apparent size 1.6 by 1.3 arcmin?

IC 2474 (= PGC 26810)
Discovered (Mar 21, 1890) by
Guillaume Bigourdan (275)
A magnitude 14.7 spiral galaxy (type Sbc??) in Leo (RA 09 27 11.2, Dec +23 02 03)
Apparent size 0.5 by 0.2 arcmin?

IC 2475 (= PGC 26851)
Discovered (Jan 10, 1900) by
Stephane Javelle (1103)
A magnitude 15.2 spiral galaxy (type Sb??) in Leo (RA 09 27 54.3, Dec +29 47 32)
Apparent size 0.9 by 0.2 arcmin?

IC 2476 (= PGC 26854)
Discovered (Apr 14, 1896) by
Stephane Javelle (1104)
A magnitude 12.9 lenticular galaxy (type E/S0??) in Leo (RA 09 27 52.8, Dec +29 59 09)
Apparent size 1.2 by 0.9 arcmin?

IC 2477
Recorded (May 1, 1896) by
Stephane Javelle (1105)
A lost or nonexistent object in Leo (RA 09 27 59.5, Dec +29 42 20)

IC 2478 (= PGC 26865)
Discovered (Apr 14, 1896) by
Stephane Javelle (1106)
A magnitude 14.7 lenticular galaxy (type S0/a?) in Leo (RA 09 28 00.9, Dec +30 02 15)
Apparent size 0.7 by 0.7 arcmin?

IC 2479 (= PGC 26866)
Discovered (Apr 14, 1896) by
Stephane Javelle (1107)
A magnitude 14.8 spiral galaxy (type SBb??) in Leo (RA 09 28 04.2, Dec +29 59 28)
Apparent size 0.4 by 0.2 arcmin?

IC 2480 (= PGC 26883)
Discovered (Apr 14, 1896) by
Stephane Javelle (1108)
A magnitude 14.5 lenticular galaxy (type S0/(r)a??) in Leo (RA 09 28 17.8, Dec +29 42 23)
Apparent size 0.8 by 0.5 arcmin?

IC 2481 (= PGC 26826)
Discovered (Mar 23, 1900) by
Stephane Javelle (1109)
A magnitude 13.6 spiral galaxy (type Sab??) in Hydra (RA 09 27 28.8, Dec +03 55 45)
Apparent size 0.9 by 0.6 arcmin?

IC 2482 (= PGC 26796)
Discovered (Mar 14, 1899) by
Herbert Howe (3)
A magnitude 11.5 elliptical galaxy (type E3??) in Hydra (RA 09 26 59.2, Dec -12 06 30)
Apparent size 2.3 by 1.6 arcmin?

IC 2483 (= PGC 26928)
Discovered (Apr 9, 1896) by
Stephane Javelle (1110)
A magnitude 14.9 spiral galaxy (type S??) in Leo (RA 09 29 25.7, Dec +30 59 40)
Apparent size 0.4 by 0.3 arcmin?

IC 2484
Recorded (Jan 22, 1898) by
Lewis Swift (XI-94)
A lost or nonexistent object in Vela (RA 09 26 50.3, Dec -42 50 33)

IC 2485
Recorded (1900) by
DeLisle Stewart (317)
A lost or nonexistent object in Antlia (RA 09 27 11.8, Dec -39 17 05)

IC 2486 (= PGC 26982)
Discovered (May 16, 1903) by
Stephane Javelle (1111)
A magnitude 14.0 spiral galaxy (type SBbc??) in Leo (RA 09 30 17.4, Dec +26 38 28)
Apparent size 0.9 by 0.8 arcmin?

IC 2487 (= PGC 26966)
Discovered (Apr 26, 1897) by
Stephane Javelle (1112)
A magnitude 13.4 spiral galaxy (type Sb??) in Leo (RA 09 30 09.0, Dec +20 05 24)
Apparent size 1.7 by 0.4 arcmin?

IC 2488 (= OCL 789)
Discovered (1751) by
Nicolas Lacaille
A magnitude 7.4 open cluster (type II2m) in Vela (RA 09 27 27.0, Dec -56 57 24)
Per Dreyer, IC 2488 (= Bailey, 1860 RA 09 23 24, NPD 146 22) is a "cluster, coarse". The attribution to Solon Bailey is due to his observation of 1896, and the 1860 coordinates are presumably based on that observation; but Lacaille had recorded the cluster nearly a century and a half earlier (as his list III number 4), and is now given credit for the original discovery. The position precesses to RA 09 27 36.6, Dec -56 58 33, about an arcmin and a half southeast of the position listed above, but well within the 15 arcmin diameter of the cluster, so the identification is certain. IC 2488 is about 4000 light years from the Sun and 300 light years below the galactic plane, so it is well within the disc of the Milky Way galaxy, though not centrally located. The turnoff point for its Main Sequence and the position of the red giant branch suggest an age of about 180 million years. Almost half the stars seen within the boundary of the cluster appear to be cluster members; the rest are foreground or background stars.
DSS image of open cluster IC 2488
Above, a 20 arcmin wide DSS image centered on IC 2488

IC 2489
Recorded (late 1890's?) by
Edward Barnard
A lost or nonexistent object in Hydra (RA 09 30 36.6, Dec -05 53 13)

IC 2490 (= PGC 27121)
Discovered (May 1, 1896) by
Stephane Javelle (1113)
A magnitude 13.4 spiral galaxy (type Sbc??) in Leo (RA 09 33 03.7, Dec +29 55 43)
Apparent size 1.5 by 1.0 arcmin?

IC 2491 (= PGC 27254)
Discovered (May 14, 1903) by
Stephane Javelle (1114)
A magnitude 13.7 lenticular galaxy (type S0??) in Leo Minor (RA 09 35 14.2, Dec +34 43 56)
Apparent size 1.1 by 0.8 arcmin?

IC 2492 (= PGC 27129)
Discovered (1900) by
DeLisle Stewart (318)
A magnitude 15.0 spiral galaxy (type Sab??) in Antlia (RA 09 33 14.8, Dec -37 52 00)
Apparent size 0.7 by 0.3 arcmin?

IC 2493 (= PGC 27322)
Discovered (May 14, 1903) by
Stephane Javelle (1115)
A magnitude 13.9 lenticular galaxy (type S0??) in Leo Minor (RA 09 36 17.5, Dec +37 21 52)
Apparent size 0.5 by 0.3 arcmin?

IC 2494 (=
NGC 2947 = IC 547 = PGC 27309)
Discovered (May 6, 1886) by Francis Leavenworth (and later listed as NGC 2947)
Discovered (Apr 20, 1892) by Stephane Javelle (and later listed as IC 547)
Discovered (Feb 20, 1898) by Lewis Swift (XI-95) (and later listed as IC 2494)
A magnitude 12.1 spiral galaxy (type SBbc??) in Hydra (RA 09 36 05.8, Dec -12 26 12)
This entry will be primarily concerned with historical information; for anything else see NGC 2947.

IC 2495 (= PGC 27455)
Discovered (Apr 30, 1896) by
Stephane Javelle (1116)
A magnitude 14.0 spiral galaxy (type Sab??) in Leo (RA 09 38 07.4, Dec +28 03 29)
Apparent size 0.8 by 0.7 arcmin?

IC 2496 (= PGC 27499)
Discovered (May 14, 1903) by
Stephane Javelle (1117)
A magnitude 14.7 spiral galaxy (type Sbc??) in Leo Minor (RA 09 38 44.5, Dec +34 43 36)
Apparent size 0.4 by 0.3 arcmin?

IC 2497 (= PGC 165538) and Hanny's Voorwerp
IC 2497 discovered (May 14, 1903) by
Stephane Javelle (1118)
Hanny's Voorwerp discovered (2007) by Hanny van Arkel
A magnitude 15.0 spiral galaxy (type Sa? pec) in Leo Minor (RA 09 41 04.0, Dec +34 44 01)
Based on a recessional velocity of 15055 km/sec, a straightforward calculation indicates that IC 2497 is 700 million light years away. However, for objects at this distance, we have to take the expansion of the Universe during the time that the light by which we see the galaxy was enroute. Doing that shows that the galaxy was about 660 million light years away when the light we now see was emitted, about 675 million years ago (the difference between the two numbers representing the expansion of the space between here and there during that time). Given that and its apparent size of 0.68 by 0.33 arcmin, it is about 130 thousand light years across. Just to the south of the galaxy is a region of glowing gas called Hanny's Voorwerp ("Hanny's Object" in Dutch), which is part of a 300 thousand light-year long tidally distorted extension of IC 2497. The lit portion of the Voorwerp, which is about 100 thousand light years across, is thought to be a light echo caused by a quasar-like "searchlight beam" from a black hole at the core of IC 2497, which was energized by an influx of material a few hundred thousand years or so ago (one suggestion is that a passing galaxy may have both distorted IC 2497 and provided the material to energize the quasar), then "turned off" when all the material had fallen through its event horizon. Regions at about the same distance in light years as the time since the quasar was lit up are seen brightly glowing, while regions closer to the galaxy or further away have either stopped glowing, or have yet to glow as the light of the quasar continues to spread through the gaseous extension. Hanny's Voorwerp was discovered by a Dutch schoolteacher in 2007 as part of the Galaxy Zoo project, in which members of the general public are encouraged to examine galaxy images and see if they can find previously unnoticed oddities.
SDSS image of spiral galaxy IC 2497 and its tidally distorted extension, Hanny's Voorwerp
Above, a 2.4 arcmin wide SDSS image of IC 2497 and Hanny's Voorwerp
Below, a HST image of the region (Image Credits: ESA, W. Keel (University of Alabama), the Galaxy Zoo Team, NASA)
HST image of spiral galaxy IC 2497 and its tidally distorted extension, Hanny's Voorwerp
Below, a 12 arcmin wide SDSS image centered on IC 2497
SDSS image of region near spiral galaxy IC 2497

IC 2498 (= PGC 27668)
Discovered (Apr 30, 1896) by
Stephane Javelle (1119)
A magnitude 14.5 spiral galaxy (type Sb??) in Leo (RA 09 41 21.9, Dec +28 06 52)
Apparent size 0.6 by 0.2 arcmin?

IC 2499 (= PGC 1820853)
Discovered (May 23, 1903) by
Stephane Javelle (1120)
A magnitude 15.4 spiral galaxy (type SB(rs)a?) in Leo (RA 09 41 24.5, Dec +27 53 45)
Apparent size 0.6 by 0.3 arcmin.
SDSS image of spiral galaxy IC 2499
Above, a 1.2 arcmin wide SDSS image of IC 2499
Below, a 12 arcmin wide SDSS image centered on the galaxy
SDSS image of region near spiral galaxy IC 2499
Celestial Atlas
(IC 2400 - 2449) ←     IC Objects: IC 2450 - 2499     → (IC 2500 - 2549)