511 Davida
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| Discovery A | |
|---|---|
| Discoverer | R. S. Dugan |
| Discovery date | May 30, 1903 |
| Alternate designations B |
1903 LU |
| Category | Main belt |
| Orbital elements C | |
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| Eccentricity (e) | 0.185 |
| Semi-major axis (a) | 473.742 Gm (3.167 AU) |
| Perihelion (q) | 385.946 Gm (2.580 AU) |
| Aphelion (Q) | 561.538 Gm (3.754 AU) |
| Orbital period (P) | 2058.370 d (5.64 a) |
| Mean orbital speed | 16.59 km/s |
| Inclination (i) | 15.936° |
| Longitude of the ascending node (Ω) |
107.683° |
| Argument of perihelion (ω) |
338.694° |
| Mean anomaly (M) | 124.997° |
| Physical characteristics D | |
| Dimensions | 326.1 km |
| Mass | 3.6×1019 kg |
| Density | 2.0 g/cm³ |
| Surface gravity | 0.0911 m/s² |
| Escape velocity | 0.1724 km/s |
| Rotation period | 0.2137 d 1 |
| Spectral class | C |
| Absolute magnitude | 6.22 |
| Albedo (geometric) | 0.054–0.066 2 |
| Mean surface temperature |
~160 K |
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 sixth largest asteroid, measuring 326 km in diameter and comprising an estimated 1.3% 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.
[edit] Aspects
| Stationary, then retrograde | Opposition | Distance to earth | Brightness | Stationary, then prograde | Conjunction to sun | |
|---|---|---|---|---|---|---|
| 10th April 2005 | 7th June 2005 | 2.73453 AU | 11.6 mag | 7th August 2005 | 2nd January 2006 | |
| 9th June 2006 | 31st July 2006 | 2.53332 AU | 11.2 mag | 26th September 2006 | 28th February 2007 | |
| 7th September 2007 | 19th October 2007 | 1.87396 AU | 10.4 mag | 13th December 2007 | 14th June 2008 | |
| 31st December 2008 | 9th February 2009 | 1.80046 AU | 10.1 mag | 31st March 2009 | 30th September 2009 | |
| 11th March 2010 | 2nd May 2010 | 2.54593 AU | 11.4 mag | 3th July 2010 | 2nd December 2010 | |
| 29th April 2011 | 27th June 2011 | 2.72809 AU | 11.4 mag | 25th August 2011 | 21st January 2012 | |
| 8th July 2012 | 23th August 2012 | 2.33268 AU | 11.1 mag | 19th October 2012 | 30th March 2013 | |
| 15th October 2013 | 29th November 2013 | 1.65151 AU | 9.9 mag | 17th January 2014 | 30th July 2014 | |
| 2nd February 2015 | 16th March 2015 | 2.10313 AU | 10.8 mag | 13th May 2015 | 27th October 2015 | |
| 28th March 2016 | 23th May 2016 | 2.68460 AU | 11.6 mag | 24th July 2016 | 19th December 2016 | |
| 20th May 2017 | 15th July 2017 | 2.64543 AU | 11.3 mag | 11th September 2017 | 10th February 2018 | |
| 11th August 2018 | 21st September 2018 | 2.08275 AU | 10.7 mag | 18th November 2018 | 10th May 2019 | |
| 28th November 2019 | 11th January 2020 | 1.63769 AU | 9.5 mag | 25th February 2020 | 6th September 2020 |
| Minor planets | ||
|---|---|---|
| Previous minor planet | 511 Davida | Next minor planet |
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| Vulcanoids | Near-Earth asteroids | Main belt | Jupiter Trojans | Centaurs | Damocloids | Comets | Trans-Neptunians (Kuiper belt · Scattered disc · Oort cloud) |
| For other objects and regions, see: asteroid groups and families, binary asteroids, asteroid moons and the Solar system For a complete listing, see: List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names. |
