3873 Roddy
Discovery | |
---|---|
12.00[7][13] · 12.8[1] · 13.1[4][14] | |
3873 Roddy, provisional designation 1984 WB, is a stony Hungarian
Carolyn Shoemaker at the Palomar Observatory in California, United States.[3] It was named after American astrogeologist David Roddy.[2]
Orbit and classification
Roddy is a member of the
Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.6–2.1 AU once every 2 years and 7 months (951 days). Its orbit has an eccentricity of 0.13 and an inclination of 23° with respect to the ecliptic.[1] The first precovery was taken at the discovering observatory in 1953, extending the asteroid's observation arc by 31 years prior to its discovery.[3]
Physical characteristics
In the
SMASS classification, Roddy is a common S-type asteroid. It has also been characterized as a rare L-type asteroid.[13]
Diameter and albedo
According to the surveys carried out by NASA's
albedo of 0.419 and 0.512, respectively,[6][7] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 7.1 kilometers with an absolute magnitude of 13.1.[4]
Moon and lightcurve
A large number of photometric observations by American astronomer
U=3).[15] Other lightcurve observations gave a similar period between 2.478 and 2.486 hours.[5][8][9][10][11][12]
While there is strong evidence for an
asteroid moon orbiting Roddy, its existence is still uncertain as of 2016. Based on one observation/solution, the satellite has an orbital period of 19.24±0.02 hours and measures about 27% of Roddy's diameter, which is slightly less than 2 kilometers (Ds/Dp ratio of 0.27±0.02). However, an alternative orbital period of 23.8 hours is also possible.[5]
Naming
This
M.P.C. 15574).[16]
References
- ^ a b c d e f "JPL Small-Body Database Browser: 3873 Roddy (1984 WB)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2017.
- ^ ISBN 978-3-540-00238-3.
- ^ a b c "3873 Roddy (1984 WB)". Minor Planet Center. Retrieved 25 March 2016.
- ^ a b c d e f "LCDB Data for (3873) Roddy". Asteroid Lightcurve Database (LCDB). Retrieved 25 May 2016.
- ^ ISSN 1052-8091. Retrieved 1 March 2016.
- ^ . Retrieved 5 December 2016.
- ^ )
- ^ ISSN 1052-8091. Retrieved 1 March 2016.
- ^ ISSN 1052-8091. Retrieved 5 December 2016.
- ^ ISSN 1052-8091. Retrieved 1 March 2016.
- ^ ISSN 1052-8091. Retrieved 1 March 2016.
- ^ ISSN 1052-8091. Retrieved 1 March 2016.
- ^ . Retrieved 5 December 2016.
- ISSN 1052-8091. Retrieved 1 March 2016.
- ISSN 1052-8091. Retrieved 1 March 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 May 2016.
External links
- Center for Solar System Studies CS3
- The Palmer Divide Observatory: Tour given by Brian Warner on YouTube(time 4:03 min.)
- Lightcurve plot of 3873 Roddy, Palmer Divide Observatory, B. D. Warner (2009)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 3873 Roddy at AstDyS-2, Asteroids—Dynamic Site
- 3873 Roddy at the JPL Small-Body Database