11252 Laërtes

11252 Laërtes
Discovery [1]
Discovered by C. J. van Houten
I. van Houten-G.
T. Gehrels
Discovery site Palomar Obs.
Discovery date 19 September 1973
Designations
MPC designation 11252 Laërtes
Pronunciation leɪˈɜːrtiːz
(lay-ur'-teez)
Named after
 Laërtes
(Greek mythology)[2]
1973 SA2 · 1977 AY2
Jupiter trojan[3]
(Greek camp)[4]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 64.60 yr (23,594 days)
Aphelion 5.2959 AU
Perihelion 4.9918 AU
5.1438 AU
Eccentricity 0.0296
11.67 yr (4,261 days)
205.06°
0° 5m 4.2s / day
Inclination 5.8580°
78.322°
325.45°
Jupiter MOID 0.0509 AU
Jupiter Tisserand parameter 2.9890
Physical characteristics
Dimensions 41.093±5.971[5][6]
42.23 km (calculated)[7]
9.15±0.03 h[8]
0.057 (assumed)[7]
0.060±0.030[5][6]
C [7]
10.6[1][7][5] · 10.76±0.25[9]

    11252 Laërtes (lay-UR'-teez), provisional designation 1973 SA2, is a carbonaceous Jupiter trojan from the Greek camp, approximately 42 kilometers in diameter. It was discovered on 19 September 1973, by Dutch astronomer couple Ingrid and Cornelis van Houten on photographic plates taken by Dutch–American astronomer Tom Gehrels at the U.S. Palomar Observatory in California.[3]

    The dark C-type asteroid 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 at a distance of 5.0–5.3 AU once every 11 years and 8 months (4,261 days). Its orbit has an eccentricity of 0.03 and an inclination of 6° with respect to the ecliptic.[1] The first precovery was taken at the discovering observatory in 1951, extending the asteroid's observation arc by 22 years prior to its discovery.[3]

    In March 2015, a rotational light-curve was obtained by astronomer Robert Stephens at the U.S. Center for Solar System Studies (CS3), California. The photometric observations showed a rotation period of 9.15±0.03 hours with a brightness variation of 0.18 in magnitude (U=2).[8] According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 41.1 kilometers in diameter, and its surface has an albedo of 0.060.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous bodies of 0.057 and calculates a diameter of 42.2 kilometers, based on an absolute magnitude of 10.6.[7]

    As an anomaly, the asteroid did not receive a typical survey designation, although it was discovered in 1973, when the discovering trio of astronomers were conducting their second Palomar–Leiden Trojan survey (T-2).

    The minor planet was named for Laërtes, the king of Ithaca, Argonaut, husband of Anticleia, and father of Odysseus. The father of Laërtes was Arcisius, a son of the sky and thunder god and ruler of Mount Olympus, Zeus. The minor planets 651 Antikleia, 1143 Odysseus, 1151 Ithaka, 5731 Zeus were all named after these figures and places from Greek mythology.[2] Naming citation was published on 24 January 2000 (M.P.C. 38200).[10]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 11252 Laertes (1973 SA2)" (2016-06-13 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
    2. 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (11252) Laërtes. Springer Berlin Heidelberg. p. 757. ISBN 978-3-540-00238-3. Retrieved 9 April 2016.
    3. 1 2 3 "11252 Laertes (1973 SA2)". Minor Planet Center. Retrieved 9 April 2016.
    4. ↑ "List of Jupiter Trojans". Minor Planet Center. 20 June 2016. Retrieved 4 December 2016.
    5. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016.
    6. 1 2 3 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. doi:10.1088/0004-637X/759/1/49. Retrieved 4 December 2016.
    7. 1 2 3 4 5 "LCDB Data for (11252) Laertes". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
    8. 1 2 Stephens, Robert D.; Coley, Daniel, R.; French, Linda M. (January 2016). "Large L5 Jovian Trojan Asteroid Lightcurves from the Center for Solar System Studies". The Minor Planet Bulletin. 43 (1): 15–22. Bibcode:2016MPBu...43...15S. ISSN 1052-8091. Retrieved 17 May 2016.
    9. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 17 May 2016.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.

    External links

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