(6545) 1986 TR6
Discovery [1] | |
---|---|
Discovered by | M. Antal |
Discovery site | Piwnice Obs. |
Discovery date | 5 October 1986 |
Designations | |
MPC designation | (6545) 1986 TR6 |
1986 TR6 · 1989 EY4 | |
Jupiter trojan [1][2] Greek [3] · background [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 29.75 yr (10,867 d) |
Aphelion | 5.4068 AU |
Perihelion | 4.8876 AU |
5.1472 AU | |
Eccentricity | 0.0504 |
11.68 yr (4,265 d) | |
240.78° | |
0° 5m 3.84s / day | |
Inclination | 11.988° |
278.02° | |
148.94° | |
Jupiter MOID | 0.1462 AU |
TJupiter | 2.9540 |
Physical characteristics | |
Mean diameter |
±0.57 km 50.95[5] ±6.8 km 56.96[6] |
±0.01 h 16.26[7][lower-alpha 1] | |
±0.016 0.0545[6] ±0.009 0.068[5] | |
D (Pan-STARRS)[8][9] D (SDSS-MOC)[10] B–V = ±0.041 0.734[11] V–R = ±0.042 0.499[11] V–I = ±0.064 0.910[8] | |
10.0[5] 10.1[1][2][8] ±0.25 10.26[9] | |
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(6545) 1986 TR6, provisional designation 1986 TR6, is a Jupiter trojan from the Greek camp, approximately 53 kilometers (33 miles) in diameter. It was discovered on 5 October 1986, by Slovak astronomer Milan Antal at the Piwnice Astronomical Observatory in Poland.[1] The dark D-type asteroid has a rotation period of 16.3 hours and belongs to the 90 largest Jupiter trojans.[8] It has not been named since its numbering in September 1995.[12]
Orbit and classification
1986 TR6 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 .[3] It is also a non-family asteroid in the Jovian background population.[4] It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 8 months (4,265 days; semi-major axis of 5.15 AU). Its orbit has an eccentricity of 0.05 and an inclination of 12° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation at Piwnice in October 1986.[1]
Numbering and naming
This minor planet was numbered on 9 September 1995 (M.P.C. 25628).[12] As of 2018, it has not been named.[1]
Physical characteristics
In the SDSS-based taxonomy, 1986 TR6 is dark D-type asteroid,[6][10] which agrees with the determined spectral type by Pan-STARRS.[8][9] Its V–I color index of 0.91 is typical for most larger Jupiter trojans (also see table below).[8]
Rotation period
In March 2013, a rotational lightcurve of 1986 TR6 was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies in Landers, California. Lightcurve analysis gave a rotation period of ±0.01 hours with a brightness amplitude of 0.31 16.26magnitude (U=2+).[7][8][lower-alpha 1]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer and the Infrared Astronomical Satellite IRAS, 1986 TR6 measures 50.95 and 56.96 kilometers in diameter and its surface has an albedo of 0.068 and 0.0545, respectively.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1.[8]
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Notes
References
- 1 2 3 4 5 6 "6545 (1986 TR6)". Minor Planet Center. Retrieved 20 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 6545 (1986 TR6)" (2016-07-06 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2018.
- 1 2 "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 20 June 2018.
- 1 2 "Asteroid (6545) 1986 TR6 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 20 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". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 20 June 2018. (online catalog)
- 1 2 3 4 "Asteroid (6545) 1986 TR6". Small Bodies Data Ferret. Retrieved 20 June 2018.
- 1 2 French, Linda M.; Stephens, Robert, D.; Coley, Daniel R.; Wasserman, Lawrence H.; Vilas, Faith; La Rocca, Daniel (October 2013). "A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids". The Minor Planet Bulletin. 40 (4): 198–203. Bibcode:2013MPBu...40..198F. ISSN 1052-8091. Retrieved 20 June 2018.
- 1 2 3 4 5 6 7 8 "LCDB Data for (6545)". Asteroid Lightcurve Database (LCDB). Retrieved 20 June 2018.
- 1 2 3 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 20 June 2018.
- 1 2 Carvano, J. M.; Hasselmann, P. H.; Lazzaro, D.; Mothé-Diniz, T. (February 2010). "SDSS-based taxonomic classification and orbital distribution of main belt asteroids". Astronomy and Astrophysics. 510: 12. Bibcode:2010A&A...510A..43C. doi:10.1051/0004-6361/200913322. Retrieved 20 June 2018.
- 1 2 Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited" (PDF). Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. Retrieved 20 June 2018.
- 1 2 "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- (6545) 1986 TR6 at AstDyS-2, Asteroids—Dynamic Site
- (6545) 1986 TR6 at the JPL Small-Body Database