86,540
தொகுப்புகள்
Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8.6
(Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8.5) |
(Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8.6) |
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* [http://www.minorplanetcenter.net/iau/info/Astrometry.html MPC Guide to Minor Body Astrometry]
* [http://ad.usno.navy.mil/ Astrometry Department of the U.S. Naval Observatory] {{Webarchive|url=https://web.archive.org/web/20110724055402/http://ad.usno.navy.mil/ |date=2011-07-24 }}
** [http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod USNO Astrometric Catalog and related Products] {{Webarchive|url=https://web.archive.org/web/20150826005049/http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod |date=2015-08-26 }}
* {{cite web
| url = http://www.astro.virginia.edu/~rjp0i/museum/engines.html
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