4833 Meges
Discovery [1] | |
---|---|
Discovered by | C. Shoemaker |
Discovery site | Palomar Obs. |
Discovery date | 8 January 1989 |
Designations | |
MPC designation | (4833) Meges |
Pronunciation | /ˈmiːdʒiːz/ · MEE-jeez |
Named after | Meges (Greek mythology)[1] |
1989 AL2 · 1975 XN5 | |
Jupiter trojan [1][2][3] Greek [4][5] · background [5] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 28.73 yr (10,492 d) |
Aphelion | 5.7298 AU |
Perihelion | 4.7596 AU |
5.2447 AU | |
Eccentricity | 0.0925 |
12.01 yr (4,387 d) | |
255.69° | |
0° 4m 55.56s / day | |
Inclination | 34.708° |
101.74° | |
279.09° | |
Jupiter MOID | 0.0611 AU |
TJupiter | 2.6360 |
Physical characteristics | |
Mean diameter |
±0.94 km 80.16[6] ±5.8 km 87.33[7] km 87.52(derived)[3] ±2.27 km 89.39[8] |
±0.026 h 14.250[9] ±0.002 h 14.266[10][lower-alpha 1] ±0.004 h 14.285[11][lower-alpha 1] | |
±0.008 0.0531[7] ±0.003 0.054[8] 0.0635(derived)[3] ±0.012 0.076[6] | |
D (S3OS2)[12] C (assumed)[3] V–I = ±0.022 0.940[3] | |
8.9[1][2][3][6] 9.10[7][8] ±0.27 9.14[13] | |
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4833 Meges (/ˈmiːdʒiːz/ MEE-jeez), provisional designation 1989 AL2, is a large Jupiter trojan from the Greek camp, approximately 85 kilometers (53 miles) in diameter. It was discovered on 8 January 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California.[1] The D-type asteroid belongs to the 40 largest Jupiter trojans and has a rotation period of 14.25 hours.[3] It was named after Meges from Greek mythology.[1]
Orbit and classification
Meges is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[5][14]
It orbits the Sun at a distance of 4.8–5.7 AU once every 12.01 years (4,387 days; semi-major axis of 5.24 AU). Its orbit has an eccentricity of 0.09 and an inclination of 35° with respect to the ecliptic.[2] The asteroid was first observed as 1975 XN5 at Crimea–Nauchnij in December 1975. The body's observation arc begins with its official discovery observation at Palomar in January 1989.[1]
Physical characteristics
In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Meges is a dark D-type asteroid, the most common spectral type in the Jovian asteroid population, especially in the Greek camp.[14][12] Its V–I color index of 0.94 is typical for most Jupiter trojans. It is also an assumed C-type asteroid.[3]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Meges measures between 80.16 and 89.39 kilometers in diameter and its surface has an albedo between 0.053 and 0.076.[6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0635 and a diameter of 87.52 kilometers based on an absolute magnitude of 8.9.[3]
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Rotation period
In August 1995, a rotational lightcurve of Meges was obtained by ESO astronomers Stefano Mottola and Hans-Josef Schober using the Bochum 0.61-metre Telescope at La Silla Observatory in Chile. Lightcurve analysis gave a well-defined rotation period of 14.250 hours with a brightness variation of 0.13 magnitude (U=3).[3][9]
Photometric observation of this asteroid by Robert Stephens and Daniel Coley at the Center for Solar System Studies during 2016 and 2017, gave two lightcurves with a concurring period of 14.266 and 14.285 hours and an amplitude of 0.27 and 0.44, respectively (U=3-/3).[3][10][11][lower-alpha 1]
Naming
This minor planet was named by the discoverer from Greek mythology after Meges, commander of the Greek contingent from Dulichium and Echinae who brought 40 ships to the Trojan War. Together with Thoas, after whom 4834 Thoas was named, he helped to persuaded Achilles to rejoin the Trojan War.[1] Meges was one of the men to enter the wooden Trojan Horse. The official naming citation was published by the Minor Planet Center on 25 August 1991 (M.P.C. 18647).[15]
Notes
- 1 2 3 Lightcurve plots of (4833) Meges from April 2016 and June 2017 by Daniel Coley and Robert Stephens at the Center for Solar System Studies (U80) and (U81). Quality code is 3/3 (lightcurve rating at CS3). Summary figures at the LCDB and CS3.
References
- 1 2 3 4 5 6 7 8 "4833 Meges (1989 AL2)". Minor Planet Center. Retrieved 12 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 4833 Meges (1989 AL2)" (2017-09-30 last obs.). Jet Propulsion Laboratory. Retrieved 12 June 2018.
- 1 2 3 4 5 6 7 8 9 10 11 "LCDB Data for (4833) Meges". Asteroid Lightcurve Database (LCDB). Retrieved 12 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 12 June 2018.
- 1 2 3 "Asteroid (4833) Meges – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 5 June 2018.
- 1 2 3 4 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" (PDF). The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 9 June 2018. (online catalog)
- 1 2 3 4 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. Bibcode:2004PDSS...12.....T. Retrieved 15 June 2018.
- 1 2 3 4 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. Retrieved 15 June 2018. (online, AcuA catalog p. 153)
- 1 2 Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170. Retrieved 12 June 2018.
- 1 2 Stephens, Robert D.; Coley, Daniel R.; Warner, Brian D.; French, Linda, M. (October 2016). "Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies". The Minor Planet Bulletin. 43 (4): 323–331. Bibcode:2016MPBu...43..323S. ISSN 1052-8091. Retrieved 12 June 2018.
- 1 2 Stephens, Robert D.; Warner, Brian D. (October 2017). "Lightcurve Analysis of L4 Trojan Asteroids at the Center for Solar System Studies 2017 April-June". The Minor Planet Bulletin. 44 (4): 312–316. Bibcode:2017MPBu...44..312S. ISSN 1052-8091. Retrieved 12 June 2018.
- 1 2 Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S3OS2: the visible spectroscopic survey of 820 asteroids" (PDF). Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 12 June 2018.
- ↑ 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" (PDF). Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 12 June 2018.
- 1 2 "Asteroid 4833 Meges". Small Bodies Data Ferret. Retrieved 12 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 12 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- (4833) Meges, Dictionary of Minor Planet Names
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 4833 Meges at AstDyS-2, Asteroids—Dynamic Site
- 4833 Meges at the JPL Small-Body Database