12714 Alkimos

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12714 Alkimos
Discovery [1]
Discovered byC. S. Shoemaker
E. M. Shoemaker
Discovery sitePalomar Obs.
Discovery date15 April 1991
Designations
(12714) Alkimos
Pronunciation/ˈælkɪmɒs, -əs/[5]
Named after
Alcimus [1]
(Greek mythology)
1991 GX1 · 1990 EY1
Minor planet category
Jupiter trojan [1][2]
Greek [3] · background [4]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc26.36 yr (9,629 d)
Aphelion5.4180 AU
Perihelion5.0443 AU
5.2312 AU
Eccentricity0.0357
11.96 yr (4,370 d)
197.17°
0° 4m 56.64s / day
Inclination9.5083°
298.90°
164.29°
Jupiter MOID0.1981 AU
TJupiter2.9710
Physical characteristics
Mean diameter
47.82±1.16 km[6]
54.62±4.20 km[7]
61.04±5.4 km[8]
28.48±0.01 h[9]
0.036±0.007[8]
0.045±0.007[7]
0.070±0.014[6]
C (assumed)[10]
Absolute magnitude (H)
10.1[1][2][6]
10.30[7][8]

12714 Alkimos /ˈælkɪmɒs/ is a large Jupiter trojan from the Greek camp, approximately 54 kilometers (34 miles) in diameter. It was discovered on 15 April 1991, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California.[1] The dark Jovian asteroid has a rotation period of 28.5 hours.[10] It was named from Greek mythology after Alcimus, son of Ares and companion of Achilles.[1]

Orbit and classification[]

Alkimos is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's L4 Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[4]

It orbits the Sun at a distance of 5.0–5.4 AU once every 12 years (4,370 days; semi-major axis of 5.23 AU). Its orbit has an eccentricity of 0.04 and an inclination of 10° with respect to the ecliptic.[2] The body's observation arc begins with its first observation at the La Silla Observatory in February 1990, or 14 months prior to its official discovery observation at Palomar.[1]

Physical characteristics[]

Alkimos is an assumed C-type asteroid, while most larger Jupiter trojans are D-types.[10]

Rotation period[]

In January 2012, a rotational lightcurve of Alkimos was obtained from photometric observations by Robert Stephens at GMARS (G79) in California. Lightcurve analysis gave a rotation period of 28.48±0.01 hours with a brightness amplitude of 0.27 magnitude (U=3-).[10][9]

Diameter and albedo[]

According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the Japanese Akari satellite and the Infrared Astronomical Satellite IRAS, Alkimos measures between 47.82 and 61.04 kilometers in diameter and its surface has an albedo between 0.036 and 0.070.[6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0431 and a diameter of 61.13 kilometers based on an absolute magnitude of 10.1.[10]

100+ largest Jupiter trojans

Naming[]

This minor planet was named from Greek mythology after the hero Alcimus, son of Ares. After Patroclus had died, he and Automedon were the two most favored by Achilles.[1] The official naming citation was published by the Minor Planet Center on 13 October 2000 (M.P.C. 41386).[11]

References[]

  1. ^ Jump up to: a b c d e f g h "12714 Alkimos (1991 GX1)". Minor Planet Center. Retrieved 23 June 2018.
  2. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 12714 Alkimos (1991 GX1)" (2016-07-06 last obs.). Jet Propulsion Laboratory. Retrieved 23 June 2018.
  3. ^ "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 23 June 2018.
  4. ^ Jump up to: a b "Asteroid (12714) Alkimos – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 23 June 2018.
  5. ^ 'Alcimus' in Noah Webster (1884) A Practical Dictionary of the English Language
  6. ^ Jump up to: a b c d 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. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. S2CID 119101711. Retrieved 23 June 2018. (online catalog)
  7. ^ Jump up to: a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
  8. ^ Jump up to: a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 23 June 2018.
  9. ^ Jump up to: a b French, Linda M.; Stephens, Robert D.; Coley, Daniel R.; Megna, Ralph; Wasserman, Lawrence H. (July 2012). "Photometry of 17 Jovian Trojan Asteroids". The Minor Planet Bulletin. 39 (3): 183–187. Bibcode:2012MPBu...39..183F. ISSN 1052-8091. Retrieved 23 June 2018.
  10. ^ Jump up to: a b c d e "LCDB Data for (12714) Alkimos". Asteroid Lightcurve Database (LCDB). Retrieved 23 June 2018.
  11. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 23 June 2018.

External links[]

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