3873 Roddy

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3873 Roddy
Discovery 
SMASS = S[1] · S[4] · L[13]
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

  1. ^ 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.
  2. ^ .
  3. ^ a b c "3873 Roddy (1984 WB)". Minor Planet Center. Retrieved 25 March 2016.
  4. ^ a b c d e f "LCDB Data for (3873) Roddy". Asteroid Lightcurve Database (LCDB). Retrieved 25 May 2016.
  5. ^
    ISSN 1052-8091
    . Retrieved 1 March 2016.
  6. ^ . Retrieved 5 December 2016.
  7. ^ )
  8. ^ . Retrieved 1 March 2016.
  9. ^ . Retrieved 5 December 2016.
  10. ^ . Retrieved 1 March 2016.
  11. ^ . Retrieved 1 March 2016.
  12. ^ . Retrieved 1 March 2016.
  13. ^ . Retrieved 5 December 2016.
  14. . Retrieved 1 March 2016.
  15. . Retrieved 1 March 2016.
  16. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 25 May 2016.

External links