Celestial Atlas
(IC 3400 - 3449) ←     IC Objects: IC 3450 - 3499 Link for sharing this page on Facebook     → (IC 3500 - 3549)
Click here for Introductory Material
QuickLinks:
3450, 3451, 3452, 3453, 3454, 3455, 3456, 3457, 3458, 3459, 3460, 3461, 3462, 3463, 3464, 3465, 3466,
3467, 3468, 3469, 3470, 3471, 3472, 3473, 3474, 3475, 3476, 3477, 3478, 3479, 3480, 3481, 3482, 3483,
3484, 3485, 3486, 3487, 3488, 3489, 3490, 3491, 3492, 3493, 3494, 3495, 3496, 3497, 3498, 3499

Page last updated Jan 21, 2013
WORKING: Add historical/physical data

IC 3450 (= PGC 89616)
Discovered (Mar 23, 1903) by
Max Wolf (4-167)
A 16th-magnitude spiral galaxy (type Sd?) in Coma Berenices (RA 12 31 24.9, Dec +26 47 47)
Based on a recessional velocity of 6945 km/sec, IC 3450 is about 325 million light years away. Given that and its apparent size of 0.4 by 0.2 arcmin, it is about 35 thousand light years across.
SDSS image of spiral galaxy IC 3450
Above, a 2.4 arcmin wide closeup of IC 3450
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3450

IC 3451 (= PGC 41437)
Discovered (Mar 23, 1903) by
Max Wolf (4-168)
A 15th-magnitude lenticular galaxy (type S0) in Coma Berenices (RA 12 31 24.0, Dec +28 51 20)
Apparent size 0.75 by 0.55 arcmin.
SDSS image of lenticular galaxy IC 3451
Above, a 2.4 arcmin wide closeup of IC 3451
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3441
SDSS image of region near lenticular galaxy IC 3451, also showing lenticular galaxy IC 3441

IC 3452 (=
NGC 4497 = PGC 41457)
Discovered (Feb 23, 1784) by William Herschel (and later listed as NGC 4497)
Discovered (Sep 8, 1900) by Arnold Schwassmann (199) (and later listed as IC 3452)
A 13th-magnitude lenticular galaxy (type SAB0+(s)?) in Virgo (RA 12 31 32.6, Dec +11 37 30)
(Herschel and Schwassmann's positions are both excellent, so the identification is certain, and the double listing is due to simple oversight; for anything else, see NGC 4497.)

IC 3453 (= PGC 41466)
Discovered (May 7, 1904) by
Royal Frost (942)
A 15th-magnitude irregular galaxy (type IBm?) in Coma Berenices (RA 12 31 37.8, Dec +14 51 34)
Apparent size 1.25 by 0.35 arcmin. Listed as a member (VCC 1374) of the Virgo Cluster.
SDSS image of irregular galaxy IC 3453
Above, a 2.4 arcmin wide closeup of IC 3453
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near irregular galaxy IC 3453

IC 3454 (= PGC 41468)
Discovered (Mar 23, 1903) by
Max Wolf (4-169)
A 15th-magnitude spiral galaxy (type Sb?) in Coma Berenices (RA 12 31 38.7, Dec +27 29 47)
Apparent size 1.25 by 0.25 arcmin.
SDSS image of spiral galaxy IC 3454
Above, a 2.4 arcmin wide closeup of IC 3454
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3454

IC 3455 (= SDSS J123144.55+254709.8)
Discovered (Mar 23, 1903) by
Max Wolf (4-170)
A 16th-magnitude spiral galaxy (type S0/a?) in Coma Berenices (RA 12 31 44.6, Dec +25 47 07)
Apparent size 0.4 by 0.2 arcmin.
SDSS image of spiral galaxy IC 3455
Above, a 2.4 arcmin wide closeup of IC 3455
Below, a 12 arcmin wide region centered on the galaxy, also showing NGC 4494
SDSS image of region near spiral galaxy IC 3455, also showing elliptical galaxy NGC 4494

IC 3456
Recorded (Mar 23, 1903) by
Max Wolf
A lost or nonexistent object in Coma Berenices (RA 12 31 43.7, Dec +28 21 29)
Per Dreyer, IC 3456 (Wolf list IV #171, 1860 RA 12 24 46, NPD 60 52.1) is "very faint, pretty small, irregular figure". The position precesses to RA 12 31 43.7, Dec +28 21 29 (whence the position above), but there is nothing there nor anywhere near there. Per Corwin, there is nothing near the position even on Wolf's original plate, so the entry must be the result of a measurement or reduction error; but with hundreds of faint stars and galaxies on the plate, there is no way to know which if any of them are what Wolf recorded. So the IC object can only be listed as lost or nonexistent.
SDSS image of region centered on the apparently nonexistent IC 3456
Above, a 12 arcmin wide region centered on the position of the apparently nonexistent IC 3456

IC 3457 (= PGC 41494)
Discovered (May 10, 1904) by
Royal Frost (943)
A 14th-magnitude elliptical galaxy (type dE4?) in Virgo (RA 12 31 51.4, Dec +12 39 26)
Apparent size 1.2 by 0.7 arcmin. Listed as a member (VCC 1386) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3457
Above, a 2.4 arcmin wide closeup of IC 3457
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3457

IC 3458 (= SDSS J123144.00+280850.5)
Discovered (Mar 23, 1903) by
Max Wolf (4-172)
A 15th-magnitude spiral galaxy (type SABb?) in Coma Berenices (RA 12 31 44.0, Dec +28 08 50)
Apparent size 0.45 by 0.35 arcmin.
SDSS image of spiral galaxy IC 3458
Above, a 2.4 arcmin wide closeup of IC 3458
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3458

IC 3459 (= PGC 41505)
Discovered (Sep 13, 1900) by
Arnold Schwassmann (200)
A 14th-magnitude elliptical galaxy (type dE3?) in Virgo (RA 12 31 55.9, Dec +12 10 29)
Apparent size 1.15 by 0.8 arcmin. Listed as a member (VCC 1392) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3459
Above, a 2.4 arcmin wide closeup of IC 3459
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3459

IC 3460 (= PGC 41492)
Discovered (Mar 23, 1903) by
Max Wolf (4-173)
A 15th-magnitude spiral galaxy (type Sd?) in Coma Berenices (RA 12 31 50.4, Dec +27 23 14)
Apparent size 0.8 by 0.15 arcmin.
SDSS image of spiral galaxy IC 3460
Above, a 2.4 arcmin wide closeup of IC 3460
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3460

IC 3461 (= PGC 41529)
Discovered (Sep 13, 1900) by
Arnold Schwassmann (201)
A 14th-magnitude elliptical galaxy (type dE2?) in Virgo (RA 12 32 02.8, Dec +11 53 23)
Apparent size 0.8 by 0.65 arcmin. Listed as a member (VCC 1407) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3461
Above, a 2.4 arcmin wide closeup of IC 3461
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3466
SDSS image of region near elliptical galaxy IC 3461, also showing spiral galaxy IC 3466

IC 3462 (= PGC 41544)
Discovered (May 7, 1904) by
Royal Frost (944)
A 15th-magnitude elliptical galaxy (type dE5?) in Coma Berenices (RA 12 32 09.6, Dec +15 18 04)
Apparent size 0.75 by 0.4 arcmin. Listed as a member (VCC 1417) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3462
Above, a 2.4 arcmin wide closeup of IC 3462
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3462

IC 3463
Recorded (Sep 13, 1900) by
Arnold Schwassmann
A pair of 15th-magnitude stars in Virgo (RA 12 32 05.0, Dec +12 19 17)
Per Dreyer, IC 3463 (Schwassmann 202, 1860 RA 12 25 00, NPD 76 54.3) is "very faint, considerably small, extended 40". The position precesses to RA 12 32 05.0, Dec +12 19 17, between the pair of stars listed above, and their relative positions fit the 40 extension, so the identification is certain.
SDSS image of region near the pair of stars listed as IC 3463
Above, a 12 arcmin wide region centered on IC 3463

IC 3464
Recorded (Mar 23, 1903) by
Max Wolf
A 17th-magnitude star in Coma Berenices (RA 12 32 00.3, Dec +26 00 16)
Per Dreyer, IC 3464 (Wolf list IV #174, 1860 RA 12 25 02, NPD 63 13.3) is "extremely faint, very small, brighter middle, spiral". The position precesses to RA 12 32 00.8, Dec +26 00 17, just east of the star listed above. Per Corwin, a print of the original plate shows a defect superimposed on the star, "so it is not surprising that Wolf mistook it for a faint nebula", and the identification is certain.
SDSS image of region near the star listed as IC 3464
Above, a 12 arcmin wide region centered on IC 3464

IC 3465 (= PGC 41548)
Discovered (May 10, 1904) by
Royal Frost (945)
A 16th-magnitude elliptical galaxy (type dE4 N?) in Virgo (RA 12 32 12.3, Dec +12 03 41)
Apparent size 0.55 by 0.35 arcmin. Listed as a member (VCC 1420) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3465
Above, a 2.4 arcmin wide closeup of IC 3465
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3465

IC 3466 (= PGC 41536)
Discovered (May 10, 1904) by
Royal Frost (946)
A 15th-magnitude spiral galaxy (type Sm pec?) in Virgo (RA 12 32 05.6, Dec +11 49 03)
Apparent size 0.65 by 0.46 arcmin. Listed as a member (VCC 1411) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3466
Above, a 2.4 arcmin wide closeup of IC 3466
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3461 and 3467
SDSS image of region near spiral galaxy IC 3466, also showing elliptical galaxy IC 3461 and spiral galaxy IC 3467

IC 3467 (= PGC 41572)
Discovered (May 10, 1904) by
Royal Frost (947)
A 15th-magnitude spiral galaxy (type Scd?) in Virgo (RA 12 32 24.5, Dec +11 47 15)
Apparent size 1.1 by 0.25. Listed as a member (VCC 1429) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3467
Above, a 2.4 arcmin wide closeup of IC 3467
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3461 and 3466
SDSS image of region near spiral galaxy IC 3467, also showing spiral galaxy IC 3466 and part of elliptical galaxy IC 3461

IC 3468 (= PGC 41552)
Discovered (May 10, 1904) by
Royal Frost (948)
A 13th-magnitude elliptical galaxy (type E2 N?) in Virgo (RA 12 32 14.1, Dec +10 15 07)
Apparent size 1.7 by 1.3 arcmin. Listed as a member (VCC 1422) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3468
Above, a 2.4 arcmin wide closeup of IC 3468
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3468

IC 3469 (= SDSS J123210.95+254810.2)
Discovered (Mar 23, 1903) by
Max Wolf (4-175)
A 17th-magnitude compact galaxy (type S/S0?) in Coma Berenices (RA 12 32 11.1, Dec +25 48 10)
Apparent size 0.2 by 0.15 arcmin.
SDSS image of compact galaxy IC 3469
Above, a 2.4 arcmin wide closeup of IC 3469
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near compact galaxy IC 3469

IC 3470 (= PGC 41573)
Discovered (May 10, 1904) by
Royal Frost (950)
A 13th-magnitude lenticular galaxy (type E/S0?) in Virgo (RA 12 32 23.3, Dec +11 15 48)
Apparent size 0.95 by 0.85 arcmin. Listed as a member (VCC 1431) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3470
Above, a 2.4 arcmin wide closeup of IC 3470
Below, a 12 arcmin wide region centered on the galaxy, also showing NGC 4503
SDSS image of region near lenticular galaxy IC 3470, also showing lenticular galaxy NGC 4503

IC 3471 (= PGC 41567)
Discovered (May 7, 1904) by
Royal Frost (949)
A 15th-magnitude spiral galaxy (type Sdm?) in Coma Berenices (RA 12 32 22.7, Dec +16 01 06)
Apparent size 0.95 by 0.55 arcmin. Listed as a member (VCC 1427) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3471
Above, a 2.4 arcmin wide closeup of IC 3471
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3471

IC 3472 (= PGC 86418)
Discovered (Mar 23, 1903) by
Max Wolf (4-176)
A 17th-magnitude spiral galaxy (type Sd pec?) in Coma Berenices (RA 12 32 18.8, Dec +24 43 42)
Apparent size 0.4 by 0.3 arcmin.
SDSS image of spiral galaxy IC 3472
Above, a 2.4 arcmin wide closeup of IC 3472
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3472

IC 3473 (= PGC 41558)
Discovered (May 7, 1904) by
Royal Frost (951)
A 14th-magnitude spiral galaxy (type Sdm?) in Coma Berenices (RA 12 32 19.0, Dec +18 14 40)
Apparent size 1.3 by 0.8 arcmin.
SDSS image of spiral galaxy IC 3473
Above, a 2.4 arcmin wide closeup of IC 3473
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3473

IC 3474 (= PGC 41599)
Discovered (Apr 29, 1892) by
Isaac Roberts
A 14th-magnitude spiral galaxy (type Sd?) in Virgo (RA 12 32 36.8, Dec +02 39 45)
Apparent size 2.4 by 0.4 arcmin. Listed as a member (VCC 1442) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3474
Above, a 2.4 arcmin wide closeup of IC 3474
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3474

IC 3475 (= PGC 41606)
Discovered (May 10, 1904) by
Royal Frost (952)
A 13th-magnitude elliptical galaxy (type E2?) in Virgo (RA 12 32 40.6, Dec +12 46 10)
Apparent size 2.2 by 1.7 arcmin. Listed as a member (VCC 1448) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3475
Above, a 3 arcmin wide closeup of IC 3475
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3475

IC 3476 (= PGC 41608)
Discovered (Nov 22, 1900) by
Arnold Schwassmann (288)
A 13th-magnitude irregular galaxy (type IB(s)m?) in Coma Berenices (RA 12 32 41.8, Dec +14 03 00)
Apparent size 2.2 by 1.5 arcmin. Listed as a member (VCC 1450) of the Virgo Cluster.
SDSS image of irregular galaxy IC 3476
Above, a 2.4 arcmin wide closeup of IC 3476
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near irregular galaxy IC 3476

IC 3477
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 32 38.3, Dec +26 02 18)
Per Dreyer, IC 3477 (Wolf list IV #177, 1860 RA 12 25 40, NPD 63 11.1) is "very faint, very small, brighter middle, spiral". The position precesses to RA 12 32 38.5, Dec +26 02 30, just north of the star listed above, and there is nothing else nearby, so the identification is reasonably certain.
SDSS image of region near the star listed as IC 3477
Above, a 12 arcmin wide region centered on IC 3477

IC 3478 (= PGC 41614)
Discovered (Nov 22, 1900) by
Arnold Schwassmann (289)
A 13th-magnitude lenticular galaxy (type SA0?) in Coma Berenices (RA 12 32 44.2, Dec +14 11 46)
Apparent size 1.3 by 1.0 arcmin. Listed as a member (VCC 1453) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3478
Above, a 2.4 arcmin wide closeup of IC 3478
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3478

IC 3479 (= PGC 89618)
Discovered (Mar 23, 1903) by
Max Wolf (4-178)
A 16th-magnitude spiral galaxy (type S?) in Coma Berenices (RA 12 32 41.0, Dec +25 24 22)
Apparent size 0.3 by 0.15 arcmin. Recessional velocity and distance unknown, but undoubtedly large.
SDSS image of spiral galaxy IC 3479
Above, a 2.4 arcmin wide closeup of IC 3479
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3479

IC 3480 (not =
IC 3490)
Recorded (Mar 23, 1903) by Max Wolf
A 16th- and 17th-magnitude pair of stars in Coma Berenices (RA 12 32 41.4, Dec +26 49 42)
Per Dreyer, IC 3480 (Wolf list IV #179, 1860 RA 12 25 44, NPD 62 23.9) is "very faint, small, extended 90, brighter middle". The position precesses to RA 12 32 42.1, Dec +26 49 42, just east of the pair of stars listed above, and since there is nothing else nearby and the relative orientation of the stars agrees with "extended 90", the identification seems certain. (Per Corwin, IC 3480 was mistakenly equated with IC 3490 in the MOL (Master List of Nonstellar Optical Astronomical Objects), possibly as the result of a typographical error; that is the reason for the warning in the title for this entry.)
SDSS image of region near the pair of stars listed as IC 3480
Above, a 12 arcmin wide region centered on IC 3480

IC 3481 (= PGC 41634,
and with
IC 3483 and PGC 41646 = Arp 175 = Zwicky's Triplet)
Discovered (May 10, 1904) by Royal Frost (953)
A 13th-magnitude lenticular galaxy (type SAB0-? pec) in Virgo (RA 12 32 52.2, Dec +11 24 17)
Apparent size 1.1 by 1.0 arcmin. Listed as a member (VCC 1462) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3481 and spiral galaxy PGC 41646, which are part of Arp 175, which is also known as Zwicky's Triplet
Above, a 2.4 arcmin wide image of IC 3481 and PGC 41646
Below, a 7 arcmin wide view of Arp 175
SDSS image of Arp 175 (also known as Zwicky's Triplet), consisting of lenticular galaxy IC 3481 and spiral galaxies IC 3483 and PGC 41646
Below, a 12 arcmin wide region centered on IC 3481 and PGC 41646, also showing IC 3483
SDSS image of region near lenticular galaxy IC 3481 and spiral galaxy PGC 41646, also showing spiral galaxy IC 3483, with which they comprise Arp 175, which is also known as Zwicky's Triplet

PGC 41646 (= "IC 3481A",
and with
IC 3481 and 3483 = Arp 175 = Zwicky's Triplet)
Not an IC object but sometimes called IC 3481A due to its proximity to IC 3481
A 13th-magnitude spiral galaxy (type Sa? pec) in Virgo (RA 12 32 56.7, Dec +11 23 26)
Apparent size 0.7 by 0.4 arcmin. Although part of Arp 175 (= Zwicky's Triplet), PGC 41646 is not actually connected to either of its apparent companions, as it is much further away. Given that, the tracery between IC 3481 (which see for images) and IC 3483 that passes in front of PGC 41646 is merely a coincidental overlap.

IC 3482 (= PGC 1819127)
Discovered (Mar 23, 1903) by
Max Wolf (4-180)
A 15th-magnitude spiral galaxy (type Sb?) in Coma Berenices (RA 12 33 01.0, Dec +27 49 50)
Apparent size 0.4 by 0.15 arcmin.
SDSS image of spiral galaxy IC 3482
Above, a 2.4 arcmin wide closeup of IC 3482
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3482

IC 3483 (= PGC 41670,
and with
IC 3481 and PGC 41646 = Arp 175 = Zwicky's Triplet)
Discovered (May 10, 1904) by Royal Frost (955)
A 15th-magnitude spiral galaxy (type SAB(rs)b pec?) in Virgo (RA 12 33 10.0, Dec +11 20 49)
Apparent size 0.9 by 0.5 arcmin. Listed as a member (VCC 1486) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3483
Above, a 2.4 arcmin wide closeup of IC 3483
Below, a 12 arcmin wide region centered on the galaxy, also showing IC 3481 and PGC 41646
SDSS image of region near spiral galaxy IC 3483, also showing lenticular galaxy IC 4381 and spiral galaxy PGC 41646, with which it comprises Arp 175, also known as Zwicky's Triplet

IC 3484 (= PGC 41655)
Discovered (May 7, 1904) by
Royal Frost (954)
A 15th-magnitude spiral galaxy (type Sc(s)) in Coma Berenices (RA 12 33 05.3, Dec +17 24 11)
Apparent size 0.8 by 0.5 arcmin. Listed as a member (VCC 1476) of the Virgo Cluster.
SDSS image of spiral galaxy IC 3484
Above, a 2.4 arcmin wide closeup of IC 3484
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3484

IC 3485
Recorded (Feb 15, 1900) by
Arnold Schwassmann
A 15th-magnitude star in Virgo (RA 12 33 11.2, Dec +09 13 05)
Per Dreyer, IC 3485 (Schwassmann 112, 1860 RA 12 26 05, NPD 80 00.5) is "extremely faint, small; questionable". The position precesses to RA 12 33 11.2, Dec +09 13 07, right on the star listed above, and there is nothing else nearby, so the identification seems certain.
SDSS image of region near the star listed as IC 3485
Above, a 12 arcmin wide region centered on IC 3485

IC 3486 (= PGC 41682)
Discovered (Apr 29, 1892) by
Isaac Roberts
A 14th-magnitude elliptical galaxy (type dE3?) in Virgo (RA 12 33 14.0, Dec +12 51 26)
Apparent size 0.9 by 0.6 arcmin. Listed as a member (VCC 1491) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3486 and lenticular galaxy IC 3492
Above, a 2.5 arcmin wide closeup of IC 3486 and IC 3492
Below, a 12 arcmin wide region centered on the galaxies
SDSS image of region near elliptical galaxy IC 3486 and lenticular galaxy IC 3492

IC 3487 (= PGC 41680)
Discovered (Feb 15, 1900) by
Arnold Schwassmann (113)
A 14th-magnitude elliptical galaxy (type dE5?) in Virgo (RA 12 33 13.4, Dec +09 23 49)
Apparent size 1.1 by 0.6 arcmin. Listed as a member (VCC 1488) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3487
Above, a 2.4 arcmin wide closeup of IC 3487
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3487

IC 3488 (= PGC 41671)
Discovered (Mar 23, 1903) by
Max Wolf (4-181)
A 15th-magnitude lenticular galaxy (type S0?) in Coma Berenices (RA 12 33 08.4, Dec +26 20 59)
Apparent size 0.7 by 0.65 arcmin.
SDSS image of lenticular galaxy IC 3488
Above, a 2.4 arcmin wide closeup of IC 3488
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3488

IC 3489 (= PGC 41683)
Discovered (May 10, 1904) by
Royal Frost (956)
A 14th-magnitude spiral galaxy (type SAB(rs)bc?) in Virgo (RA 12 33 13.7, Dec +12 14 49)
Apparent size 0.5 by 0.5 arcmin. Listed as a member (VCC 1490) of the Virgo Cluster, but not actually a member, since much further away.
SDSS image of spiral galaxy IC 3489
Above, a 2.4 arcmin wide closeup of IC 3489
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3489

IC 3490 (= PGC 41681)
Discovered (May 10, 1904) by
Royal Frost (957)
A 16th-magnitude elliptical galaxy (type dE5?) in Virgo (RA 12 33 13.9, Dec +10 55 42)
Apparent size 0.9 by 0.45 arcmin. Listed as a member (VCC 1489) of the Virgo Cluster.
SDSS image of elliptical galaxy IC 3490
Above, a 2.4 arcmin wide closeup of IC 3490
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near elliptical galaxy IC 3490

IC 3491 (= PGC 86322)
Discovered (Mar 23, 1903) by
Max Wolf (4-182)
A 15th-magnitude spiral galaxy (type Sbc?) in Coma Berenices (RA 12 33 09.0, Dec +27 05 41)
Apparent size 1.0 by 0.2 arcmin.
SDSS image of spiral galaxy IC 3491
Above, a 2.4 arcmin wide closeup of IC 3491
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3491

IC 3492 (= PGC 41698)
Discovered (Apr 29, 1892) by
Isaac Roberts
A 14th-magnitude lenticular galaxy (type dE/S0?) in Virgo (RA 12 33 19.7, Dec +12 51 14)
Apparent size 0.65 by 0.55 arcmin. Listed as a member (VCC 1499) of the Virgo Cluster. (See IC 3486 for images.)

IC 3493
Recorded (Feb 15, 1900) by
Arnold Schwassmann
Probably a nonexistent object in Virgo (RA 12 33 21.1, Dec +09 23 25)
Per Dreyer, IC 3493 (Schwassmann 114, 1860 RA 12 26 15, NPD 79 50.2) is "extremely faint, very small". The position precesses to RA 12 33 21.1, Dec +09 23 25 (whence the position above), a little to the east of IC 3487, and almost on top of a 12th-magnitude star. However, that star cannot be IC 3493, as (per Corwin) Schwassmann had a separate measurement of the position of that star accurate to within a few arcseconds (in other words, within the apparent size of its image). Corwin supposes that a plate defect might have been involved, but the plate has gone missing, and as a result he suggests that despite requiring a substantial measurement error, the most reasonable candidate for IC 3493 is the 13th-magnitude star at RA 12 33 18.9, Dec +09 23 35 (between the 12th-magnitude star and IC 3487), and that star is listed as IC 3493 in most catalogs. However, given the fact that Schwassmann measured the position of the brighter star and IC 3487 to within arcseconds of their actual positions, it seems unlikely that he would have made such a large positional error for the fainter star, and given the substantial number of IC2 objects that represent plate defects, I think that whatever the cause, IC 3493 must represent a nonexistent object.
SDSS image of region near the position (indicated by a box) of the apparently nonexistent IC 3493, also showing elliptical galaxy IC 3487
Above, a 12 arcmin wide region centered on the position of IC 3493, also showing IC 3487

IC 3494 (= PGC 1812401)
Discovered (Mar 23, 1903) by
Max Wolf (4-183)
A 17th-magnitude spiral galaxy (type Sc?) in Coma Berenices (RA 12 33 13.6, Dec +27 35 05)
Apparent size 0.25 by 0.25 arcmin.
SDSS image of spiral galaxy IC 3494
Above, a 2.4 arcmin wide closeup of IC 3494
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near spiral galaxy IC 3494

IC 3495
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 33 16.3, Dec +26 48 34)
Per Dreyer, IC 3495 (Wolf list IV #184, 1860 RA 12 26 19, NPD 62 25.2) is "very faint, considerably small, irregular figure, difficult". The position precesses to RA 12 33 16.8, Dec +26 48 25, just southeast of the star listed above, and there is nothing else nearby so the identification is considered certain. (Corwin states that when "I was young and naive" he suggested that PGC 86324 might be IC 3495, so the reader may run across that mistaken identification. Also, the star is usually listed as being a blended visual binary, but that is incorrect; as far as visual observations are concerned, it is a single star.)
SDSS image of region near the star listed as IC 3495, also showing the star that more or less represents IC 3496, spiral galaxy PGC 86324 (which is which is often misidentified as IC 3495) and spiral galaxy IC 3498 (which is often misidentified as IC 3496)
Above, a 12 arcmin wide region centered on IC 3495, also showing IC 3496, IC 3498 and PGC 86324

PGC 86324 (not =
IC 3495)
Not an IC object but listed here since often misidentified as IC 3495
A 17th-magnitude spiral galaxy (type Sc?) in in Coma Berenices (RA 12 33 30.0, Dec +26 46 47)
Apparent size 0.3 by 0.2 arcmin.
SDSS image of spiral galaxy PGC 86324, which may be misidentified as IC 3495
Above, a 2.4 arcmin wide closeup of PGC 86324; see IC 3495 for a wider view

IC 3496
Recorded (Mar 23, 1903) by
Max Wolf
A nonexistent object in Coma Berenices (RA 12 33 18.8, Dec +26 45 37)
Usually identified with the 17th-magnitude star at RA 12 33 19.3, Dec +26 45 20
Per Dreyer, IC 3496 (Wolf list IV #185, 1860 RA 12 26 21, NPD 62 28.0) is "very faint, considerably small, irregular figure, 15th magnitude star involved to south". The position precesses to RA 12 33 18.8, Dec +26 45 37 (whence the position above), just north of the 17th-magnitude star which as noted above is usually identified as the IC object. Per Corwin, on Wolf's plate that star appears considerably elongated to the north, so the "star involved to south" must be the 17th-magnitude star, and Wolf's IV-185 must be a plate defect superimposed on the image of the star. In other words, IC 3496 actually represents a nonexistent object, but given its "involvement" with the star, it isn't entirely unreasonable to treat the star as if it were the IC object. (Further complicating things, Corwin also notes that very early on he assigned a nearby galaxy to IC 3496, and although he has corrected his error (the galaxy is actually IC 3498), the galaxy is often misidentified as IC 3496.)
SDSS image of region near the star that more or less represents IC 3496, also showing the star listed as IC 3495, spiral galaxy PGC 86324 (which is which is often misidentified as IC 3495) and spiral galaxy IC 3498 (which is often misidentified as IC 3496)
Above, a 12 arcmin wide region centered on IC 3496, also showing IC 3495, IC 3498 and PGC 86324

IC 3497
Recorded (Mar 23, 1903) by
Max Wolf
A 16th-magnitude star in Coma Berenices (RA 12 33 28.5, Dec +25 29 19)
Per Dreyer, IC 3497 (Wolf list IV #186, 1860 RA 12 26 30, NPD 63 44.3) is "very faint, very small, round, brighter middle". The position precesses to RA 12 33 28.4, Dec +25 29 19, right on the star listed above, and there is nothing else nearby so the identification is certain. (Corwin states that the star is clearly seen on a print of the original plate.)
SDSS image of region near the star listed as IC 3497
Above, a 12 arcmin wide region centered on IC 3497

IC 3498 (= PGC 86323, and not =
IC 3496)
Discovered (Mar 23, 1903) by Max Wolf
A 15th-magnitude spiral galaxy (type Sbc?) in Coma Berenices (RA 12 33 29.1, Dec +26 44 19)
Per Dreyer, IC 3498 (Wolf list IV #187, 1860 RA 12 26 31, NPD 62 29.4) is "very faint, small, irregular figure". The position precesses to RA 12 33 28.8, Dec +26 44 13, right on the galaxy, so the identification is certain. However, Corwin notes that at one time he mistakenly assigned the galaxy to IC 3496, and the error was picked up by others and persists to this day; hence the warning in the title. Apparent size 0.75 by 0.25 arcmin.
SDSS image of spiral galaxy IC 3498
Above, a 2.4 arcmin wide closeup of IC 3498; see IC 3496 for a wide-field image

IC 3499 (= PGC 41738)
Discovered (May 10, 1904) by
Royal Frost (959)
A 13th-magnitude lenticular galaxy (type S0/a?) in Virgo (RA 12 33 45.0, Dec +10 59 44)
Apparent size 1.8 by 0.5 arcmin. Listed as a member (VCC 1521) of the Virgo Cluster.
SDSS image of lenticular galaxy IC 3499
Above, a 2.4 arcmin wide closeup of IC 3499
Below, a 12 arcmin wide region centered on the galaxy
SDSS image of region near lenticular galaxy IC 3499
Celestial Atlas
(IC 3400 - 3449) ←     IC Objects: IC 3450 - 3499     → (IC 3500 - 3549)