sponsored by psychohistorian.org
Type: galaxy (in group), E
Mag: B=14.1, V=?
Size: 1.479′ x 1.23′
Synonyms: H III-551
Discovered on May 1, 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Two [NGC 5546 & NGC 5549] Both eF, vS. The place is that of the following. The first precedes the last 3 or 4'." In the Notes to the 'Catalogue of a Second Thousand of New Nebulae and Cluster of Stars' a comment reads: "The distance was underestimated, if they were h.1770 and h.1772, delta R.A. of which is 30 seconds, the second being 11' south. A second observation of May 12, 1793 (Sweep 1042) has only one, pB, S, BN. This agrees perfectly with the correct place of h.1772 and differs only 2' from the first observation. It is, however, very probably that H. in 1786 observed NGC 5542 and NGC 5546 (h.1770), 4' pf., but in that case his RA was 30 seconds too great and P.D. 12' too great. He adds: 'A little inaccurate. I would not stay to verify it properly, so that there remains some little doubt.' "
The RNGC (Sulentic and Tifft 1973) notes that this is a 14.0 mag galaxy. Their coded description reads E,R,BM.
Observer: Adam Albino Your skills: Intermediate (some years) Date/time of observation: 5/20/98 LMT=9:36, UT=2:36 Location of site: Norwell, MA (Lat 42m 16.9s, Elev ) Site classification: Exurban Sky darkness: 5.5 Limiting magnitude Seeing: 7 1-10 Seeing Scale (10 best) Moon presence: None - moon not in sky Instrument: 8" f/10 Ultima 8 PEC SCT - 80mm Mak f/10 Magnification: 45, 96,169,406 Filter(s): UHC Object(s): NGC 5546 Category: External galaxy. Constellation: Vir Data: mag 12.3 size 1.3'x1.1" Position: RA 14:18.1.5 DEC 07:3449
Description: "Stumbled across this rather bright galaxy which I had never viewed before while star hoping. Unexpectedly large with a mottled surface texture. Gave me the appearance of an IR galaxy. Some brightening of the core, but very slight and evenly. Atlas shows many faint galaxies in FOV (around mag 15+) but out of reach for the 8"."
The Messier objects
The Bennett objects
The Caldwell list
DOCdb is still in beta-release.
Known issues, feature requests, and updates on bug fixes, are here:
Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!
DOCdb is a free online resource that exists to promote deep sky observing.
You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.
Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.