13062 Podarkes

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13062 Podarkes
Discovery [1]
Discovered by C. Shoemaker
E. Shoemaker
Discovery site Palomar Obs.
Discovery date 19 April 1991
Designations
MPC designation (13062) Podarkes
Named after
Podarkes
(Greek mythology)[2]
1991 HN · 1998 XC56
Jupiter trojan[1]
(Greek camp)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 24.40 yr (8,911 days)
Aphelion 5.2091 AU
Perihelion 5.1109 AU
5.1600 AU
Eccentricity 0.0095
11.72 yr (4,281 days)
288.44°
0° 5m 2.76s / day
Inclination 8.2307°
91.024°
282.50°
Jupiter MOID 0.0147 AU
Jupiter Tisserand parameter 2.9790
Physical characteristics
Dimensions 28.958±0.358[4]
40 km (est. at 0.05)[5]
0.084±0.018[4]
11.1[1]

13062 Podarkes, provisional designation 1991 HN, is a Jupiter trojan from the Greek camp, approximately 29 kilometers in diameter. It was discovered on 19 April 1991, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory, California, United States.[6]

Orbit and classification[edit]

The orbit of this Trojan asteroid is unstable.[7][8][9] It is orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy). It orbits the Sun in the outer main-belt at a distance of 5.1–5.2 AU once every 11 years and 9 months (4,281 days). Its orbit has an eccentricity of 0.01 and an inclination of 8° with respect to the ecliptic.[1] The first used precoveries were taken at Steward Observatory (Kitt Peak–Spacewatch), extending the asteroid's observation arc by just two weeks prior to its discovery.[6]

Physical characteristics[edit]

According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Podarkes measures 29.0 kilometers in diameter, and its surface has an albedo of 0.084,[4] while a generic diameter estimate, based on an absolute magnitude of 11.1 and an albedo at 0.05 gives a larger diameter of approximately 40 kilometers.[5]

Lightcurve[edit]

As of 2017, the asteroid's composition, rotation period and shape remain unknown.[1][10]

Naming[edit]

This minor planet is named after the Greek warrior Podarkes from Greek mythology, who took 40 ships to the Trojan War. He is the son of Ares and brother of Protesilaos, after whom the Jupiter trojan, 3540 Protesilaos, is named.[2] Protesilaos was the first Greek to set foot on the shores of Troy and to die in the war. The official naming citation was published by the Minor Planet Center on 13 October 2000 (M.P.C. 41386).[11]

References[edit]

  1. ^ a b c d e f "JPL Small-Body Database Browser: 13062 Podarkes (1991 HN)" (2015-08-14 last obs.). Jet Propulsion Laboratory. Retrieved 24 June 2017. 
  2. ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (13062) Podarkes. Springer Berlin Heidelberg. p. 792. ISBN 978-3-540-00238-3. Retrieved 6 April 2016. 
  3. ^ "List of Jupiter Trojans". Minor Planet Center. 20 June 2016. Retrieved 4 August 2016. 
  4. ^ a b c Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. Bibcode:2012ApJ...759...49G. arXiv:1209.1549Freely accessible. doi:10.1088/0004-637X/759/1/49. Retrieved 5 December 2016. 
  5. ^ a b "Absolute Magnitude (H)". NASA/JPL. Retrieved 6 April 2016. 
  6. ^ a b "13062 Podarkes (1991 HN)". Minor Planet Center. Retrieved 6 April 2016. 
  7. ^ Celestial Mechanics and Dynamical Astronomy, Volume 78, Numbers 1-4, 125-136, DOI: 10.1023/A:1011120413687
  8. ^ Pilat-Lohinger, E.; Dvorak, R.; Burger, Ch. (January 1999). "Trojans in Stable Chaotic Motion". Celestial Mechanics and Dynamical Astronomy (1/4): 117–126. Bibcode:1999CeMDA..73..117P. doi:10.1023/A:1008338811969. Retrieved 24 June 2017. 
  9. ^ Bonnie A. Steves & A. J. Maciejewski (2001). The restless universe: applications of gravitational n-body dynamics to planetary, stellar and galactic systems : proceedings of the fifty-fourth Scottish Universities Summer School in Physics, Blair Atholl, 23 July - 5 August 2000. Scottish Graduate. Scottish Universities Summer School in Physics, Institute of Physics. ISBN 9780750308229. 
  10. ^ "LCDB Data for (13062) Podarkes". Asteroid Lightcurve Database (LCDB). Retrieved 24 June 2017. 
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016. 

External links[edit]