M 98 (NGC 4192) Galaxy in Coma Berenices

Located at: RA 12 hours 13 minutes 48 seconds, Dec +14 degrees 54 minutes 00 seconds

Size: 9.8' x 2.7'; Magnitude: 11.0 blue; Class: SAB(s)ab

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, 430 minutes (43 x 10 minute subs), 05/16/17/18/19/2009; seeing 1.8-3.0 FWHM per CCDStack
Processing:

CCDStack 1.6.0.2, Photoshop 7.0
Location:

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)
Notes: From the NGC / IC Project:

NGC 4186 (1.0'x0.8', 14.6p mag, Cl:SA(s)ab:) is the 'bright' little galaxy 11 minutes off the Southeastern (lower left) tip of M 98.

Contemporary Visual Observation(s) for NGC 4192
NGC 4192 = M98 = U07231 = MCG +03-31-079 = CGCG 098-108 = PGC 39028
12 13 48.2 +14 54 01
V = 10.1;  Size 9.9x2.2;  SB = 13.6;  PA = 155d

17.5": bright, very large, very elongated 4:1 NNW-SSE, 6'x1.5', small bright 
core, stellar nucleus.  A faint knot is highly suspected near the south tip.  
N4186 lies 11' SSE.  Located 30' W of 6 Comae Berenices (V = 5.1).

13": bright, large, very elongated, small bright nucleus, impressive.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 4192
NGC 4192.  See NGC 4186. - Dr. Harold G. Corwin, Jr.

Contemporary Visual Observation(s) for NGC 4186

NGC 4186 = UGC 07240 = MCG +03-31-081 = CGCG 098-111 = PGC 39057
12 14 06.5 +14 43 33
V = 13.8;  Size 1.1x0.9;  SB = 13.5;  PA = 60d

17.5": faint, small, slightly elongated.  Located 11.0' SSE of M98.

13": faint, small, slightly elongated SW-NE, 11' SSE of M98.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 4186
NGC 4186.  Tempel mentions this object in two of his papers (AN 2212 and AN
2439).  In the earlier paper, the offset from M98 (= N4192 = GC2786) is given
as -10s and -10', leading to a position listed as 12 06 15 +15 32 (1855) [12
06 30 +15 30 (1860)] which is 10s off the NGC place (12 06 20 +15 31).
However, the later paper lists the offset as +20s, -9.5m which gives 12 07 00
+15 31 (1860).  This position agrees with that from Zwicky for an Sa galaxy
with mp = 14.9; this was also earlier mentioned by Carlson (1940).  The
mistake seems to have been Dreyer's:  he applied the right ascension offset
(from Tempel's later paper) with the wrong sign.

Carlson and RC2 are correct; RNGC, UGC, and VCC are incorrect.
 - Dr. Harold G. Corwin, Jr.