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
IC 3791
IC 3791
History and Accurate Positions for the NGC/IC Objects (Corwin 2004)
IC 3791 = NGC 4695. Swift found the IC object on 23 May 1897. That same night, he found two other objects: IC 2976 and IC 4205 (both of which see). I2976 is NGC 3979, and I4205 is IC 853. For I3791, he notes "[NGC] 4732 in field." That can't be right as N4732 is 1.5 degrees south of Swift's position for I3791. (The galaxy in the field is actually N4686). This was not a particularly good night for Lewis Swift.
His position for I3791 shares with that for I4205 a declination which is about five arcmin too far north; the right ascensions are very close to correct in both cases. (I2976, on the other hand, has a declination that is very close to the modern value, while its RA is 1.5 minutes too small.) Since his descriptions are also appropriate for the galaxies, I have little doubt about the identities I've suggested here.
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.