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511 Davida (da-vee'-da ?) is a large main belt asteroid. It was discovered by R. S. Dugan in 1903. It is thought to be the fifth largest known asteroid, measuring 326 km in diameter and comprising an estimated 1.6% of the total mass of the asteroid belt. It is a C-type asteroid, which means that it is dark in colouring with a carbonate composition.
Davida is one of the few main belt asteroids whose shape has been determined by ground-based visual observation. In 2002, astronomers at the Keck Observatory used the Keck II telescope, which is fitted with adaptive optics, to photograph Davida. The image revealed a semi-oblong object with at least two flat facets. Its rotation period is about 5 hours.
Davida is named after David Peck Todd, an astronomy professor at Amherst College.
Aspects
| Stationary, than retrograde | Opposition | Distance to earth | Brightness | Stationary, than prograde | Conjunction to sun | |
|---|---|---|---|---|---|---|
| 10th April 2005 | 7th June 2005 | 2,73453 AE | 11,6 mag | 7th August 2005 | 2nd January 2006 | |
| 9th June 2006 | 31st July 2006 | 2,53332 AE | 11,2 mag | 26th September 2006 | 28th February 2007 | |
| 7th September 2007 | 19th October 2007 | 1,87396 AE | 10,4 mag | 13th December 2007 | 14th June 2008 | |
| 31st December 2008 | 9th February 2009 | 1,80046 AE | 10,1 mag | 31st March 2009 | 30th September 2009 | |
| 11th March 2010 | 2nd May 2010 | 2,54593 AE | 11,4 mag | 3th July 2010 | 2nd December 2010 | |
| 29th April 2011 | 27th June 2011 | 2,72809 AE | 11,4 mag | 25th August 2011 | 21st January 2012 | |
| 8th July 2012 | 23th August 2012 | 2,33268 AE | 11,1 mag | 19th October 2012 | 30th March 2013 | |
| 15th October 2013 | 29th November 2013 | 1,65151 AE | 9,9 mag | 17th January 2014 | 30th July 2014 | |
| 2nd February 2015 | 16th March 2015 | 2,10313 AE | 10,8 mag | 13th May 2015 | 27th October 2015 | |
| 28th March 2016 | 23th May 2016 | 2,68460 AE | 11,6 mag | 24th July 2016 | 19th December 2016 | |
| 20th May 2017 | 15th July 2017 | 2,64543 AE | 11,3 mag | 11th September 2017 | 10th February 2018 | |
| 11th August 2018 | 21st September 2018 | 2,08275 AE | 10,7 mag | 18th November 2018 | 10th May 2019 | |
| 28th November 2019 | 11th January 2020 | 1,63769 AE | 9,5 mag | 25th February 2020 | 6th September 2020 |
Main Belt asteroids | C-type asteroids
Davida (Asteroid) | (511) Davida | 511 Davida | 511 Davida | 511 Davida | 511 Davida
"511 Davida"