M 49 (NGC 4472, Arp 134) Galaxy in Virgo

Located at: RA 12 hours 29 minutes 47 seconds. Dec +07 degrees 59 minutes 58 seconds

Size: 9.3' x 7.0' Magnitude: 9.4 blue Class: E2/S0

North is up

West to the right

Telescope:

8" f5 Newtonian reflector

Camera:

ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

 Lumicon Red filter, 720 minutes (72 x 10 minute subs), 05/19/20/21/22/2012; seeing FWHM 2.4-3.3 per CCDStack

Processing:

CCDStack 2.66.4490.32361, Photoshop CS5.1

Location:

Rolling Roof Observatory, Thousand Oaks, California 91360 (+34d 13m 29s -118h 52m 20s)

Notes: M 49 itself is not too interesting (Arp classed it as an elliptical galaxy with nearby fragments), but there are five surrounding NGC galaxies ... clockwise from the northwest (upper right) are NGC 4464 (1.1'x1.0', 12.5v mag, Cl:S?), NGC 4465 (0.4'x0.2', 15.6 mag, Cl:Sc), NGC 4467 (0.5', 14.8b, Cl:E2), NGC 4470 (1.4'x0.9', 13.0b, Cl:Sa?) and NGC 4492 (2.0', 12.6v, Cl:SA(s)a?). See this map for NGC identifications. There are many more faint galaxies in this field.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 4472
NGC 4472 = M49 = U07629 = MCG +01-32-083 = Arp 134 = PGC 41220
12 29 46.8 +08 00 01
V = 8.4;  Size 10.2x8.3;  SB = 13.2;  PA = 155d

17.5": very bright, fairly large, sharp concentration to a compact very bright 
nucleus, large halo slightly elongated ~N-S fades at the edges.  A mag 12 star 
is superimposed at the E edge 0.8' from center.  A faint galaxy N4467 lies 5' W.

- by Steve Gottlieb
Contemporary Visual Observation(s) for NGC 4464
NGC 4464 = UGC 07619 = MCG +01-32-078 = PGC 41148
12 29 21.3 +08 09 23
V = 12.5;  Size 1.1x0.8;  SB = 12.2;  PA = 0d

17.5": moderately bright but very small, irregularly round, high surface 
brightness, small bright core, possible stellar nucleus.  M49 is at the edge of 
the 220x field 11.5' SE.

- by Steve Gottlieb
Contemporary Visual Observation(s) for NGC 4465 (no description)
Contemporary Visual Observation(s) for NGC 4467
NGC 4467 = MCG +01-32-080 = PGC 41169
12 29 30.2 +07 59 34
V = 13.8;  Size 1.2x0.9;  SB = 13.9

17.5": very faint, very small, almost round.  Located 6' W of M49!  A mag 12.5 
star is just off the W edge 34" from the center.  Forms a pair with extremely 
faint N4467 2.8' NW.

NGC position is a perfect match though not found on plate by Schwassmann (IC 2 
notes).  Although listed as a galaxy in the RNGC, the new description equates 
this number with N4465.  Described as an E4 galaxy in Carlson.

- by Steve Gottlieb

Contemporary Visual Observation(s) for NGC 4470

NGC 4470 = UGC 07627 = MCG +01-32-082 = CGCG 042-132 = N4610 = PGC 41189
12 29 37.9 +07 49 25
V = 12.1;  Size 1.3x0.9;  SB = 12.2;  PA = 0d

17.5": moderately bright, fairly small, oval N-S, pretty even surface 
brightness.  Located 14' SSW of M49.

- by Steve Gottlieb

=================================================================
NGC 4610 = N4470 = U07627 = MCG +01-32-082 = CGCG 042-132 = PGC 41189
12 29 37.9 +07 49 25

See observing notes for N4470.

Discovered by WH (II 19).  In Scientific Papers of WH, Dreyer writes "there is 
no nebula in the place of GC 3147 (N4610) (Ann Harvard Coll Obs, xiii p 81 and 
Max Wolf, List II).  M49 is most probably I 7 (confused by WH with M61), has a 
smaller nebula (II 498) 9s p, 10.5' s and the agreement of the sketch with the 
appearance of M49, the star following it and II 498 = N4470) is perfect.  
Reinmuth repeats II 19 = N4470 = N4610.  See Corwin's write-up in NGCBUGS.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 4470
NGC 4610 = NGC 4470.  Dreyer, in his notes in the Scientific Papers, shows 
convincingly that H II 19 = N4610 is the same galaxy as NGC 4470, and that WH
himself was at least aware that he had made a mistake in identifying one of
Messier's nebulae in the Virgo Cluster.  Dreyer reproduces one of WH's 
sketches of the I 7 and II 19 field -- it matches the appearance of M49, an
accompanying star, and NGC 4470 perfectly. - Dr. Harold G. Corwin, Jr.
================================================================================
NGC 4470 = NGC 4610, which see.  This may also be IC 3281 (which see), but 
that is extremely unlikely.  It is certainly not IC 3417 (which see) -- that
is a star 2.3 arcmin north of the galaxy. - Dr. Harold G. Corwin, Jr.

Contemporary Visual Observation(s) for NGC 4492

NGC 4492 = UGC 07656 = MCG +01-32-089 = IC 3438 = PGC 41383
12 30 59.7 +08 04 40
V = 12.6;  Size 1.7x1.6;  SB = 13.5

17.5": fairly faint, small, round, bright core.  A mag 12.5 star is very close 
NE 45" from center and a brighter mag 11.5 star is 1.8' SE.  Located 19' ENE of 
M49.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 4492
IC 3438 = NGC 4492.  Schwassmann has two entries for the galaxy in his table,
but from different plates.  The descriptions are comparable, and the positions
are about 10 arcsec different, but still within the boundaries of the image of
the galaxy.

The identity was first suggested by Adelaide Ames in her Virgo Cluster list
of the 1930's.  It was picked up by the de Vaucouleurs for RC1, and also by
Zwicky, Herzog, and Wild for CGCG.  Wolfgang adopted the identity for his 
list, and Bob Erdmann also noticed the identity.  He alerted me, and I have
finally got the two galaxies equated here.  Sometimes, it takes more than a 
village. - Dr. Harold G. Corwin, Jr.
=================================================================
IC 3438. 
POSS. O-1563. 
Schwassmann #65.  12hr 28m 27.789s + 08 21' 21.115" (1950).
12hr 31m 00.292s + 08 04' 47.133" (2000). 
This is equal to NGC 4492 (H 499-2) :   CGCG, Steinicke, APL, NED, SIMBAD, UGC, 
RC2,MOL, Carlson and PGC all correctly make IC 3438 = NGC 4492.  MCG gives only the 
identity NGC 4492. - Malcolm J. Thomson