sponsored by psychohistorian.org
Online tools
Coordinates
1. Precession: Convert RA and Dec from one epoch to another.
2. In Constellation?: Given the co-ordinate of a point, determine which constellation it is in.
The Moon
1. Phases: Calculate the instance of lunar phases for a calendar month.
2. Deep Time: Show when the Moon interferes with proper observing.
Constellations
1. Sky region visibility: Explore the visibility of a region of the sky.
2. In Constellation?: Given the co-ordinate of a point, determine which constellation it is in.
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.
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.