Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/frag_build_banner.php on line 1
sponsored by psychohistorian.org
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/frag_build_menu.php on line 1
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/frag_build_browse_showobject.php on line 1
NGC 5557
NGC 5557, LEDA 51104, MCG+06-31-093, UGC 9161, I 99, h 1776, GC 3843
Type: galaxy, E
Mag: B=12.2, V=?
Size: 2.344′ x 1.584′
PA: 105°
Historical observations
William Herschel (c.1784)
Synonyms: H I-099
Discovered in 1785 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "vB, S, R, vsmbM."
Published comments
Burnham's Celestial Handbook
Burnham calls it a 12.6 mag elliptical galaxy in Bootes, measuring 0.9' by 0.8' which is suddenly much brighter in the middle, considerably bright, small and slightly elongated.
Sulentic & Tifft (1973)
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads E,R,BM.
Modern observations
Steve Coe
Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty large, little elongated 1.5 X 1 in PA 90 and much brighter in the middle with an almost stellar nucleus at 165X."
Tom Lorenzin
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.3M; 1.3' diameter; soft round glow with brighter, almost stellar nucleus 5' ESE of an 11M star; 1 degree S and a bit E is 5M SAO 64053; 25' WSW of star is SP GAL N5533 (12M; 2.5'x 1.5' extent)."
Brian Skiff
RC3: V=11.0/12.6
15cm - f, sm br nuc.
- mod br @ 80x w/ br center. 140x: circ or sl oval (elong NE-SW), 1'.5
diam. strong sharp concen to vbr *ar nuc. two m13 *s SE make triangle 5'
on-a-side. BS, 7Jun1991, Anderson Mesa.
25cm - easily seen, circ, broad core fades evenly to edge. 122x: 1' diam.
30cm - mod br, well concen @ 140x, *ar nuc and br core. 220x: br part 30" diam,
halo fairly extensive to 1'.1. br inner region makes nuc occas appear
dbl.
Contemporary observations
Magda Streicher
(no date)
Alldays (22.50S, 20.12E, 770m).
12-inch f/10 SCT (218x, 346x)
Round in appearance with bright a core, with fuzzy envelope around which is very much surround by nebulosity. In a NW-SE direction and about 2.2' in size.
Tom Bryant
2011 6 7 0:26:48
Observing site: Little Bennett Regional Park
Telescope: C-11
[14h 18m 24s, 36° 30m 0s] Small, round E? B: E1.
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/frag_right_bookmarks.php on line 1
Favourite lists
Lacaille's catalogue
The Messier objects
Dunlop's catalogue
The Bennett objects
The Caldwell list
Named DSOs
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/db_right_object_search.php on line 1
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/db_right_help.php on line 1
The Bug Report
DOCdb is still in beta-release.
Known issues, feature requests, and updates on bug fixes, are here:
Feedback
Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!
Help!
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.
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/db_bottom_maincontent.php on line 1
Notice: session_start(): Ignoring session_start() because a session is already active in /home/yivumoo/public_html/scripts/db_bottom_copyright.php on line 1
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.