(6545) 1986 TR6

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(6545) 1986 TR6
Discovery[1]
Discovered byM. Antal
Discovery sitePiwnice Obs.
Discovery date5 October 1986
Designations
(6545) 1986 TR6
1986 TR6 · 1989 EY4
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 arc29.75 yr (10,867 d)
Aphelion5.4068 AU
Perihelion4.8876 AU
5.1472 AU
Eccentricity0.0504
11.68 yr (4,265 d)
240.78°
0° 5m 3.84s / day
Inclination11.988°
278.02°
148.94°
Jupiter MOID0.1462 AU
TJupiter2.9540
Physical characteristics
Mean diameter
50.95±0.57 km[5]
56.96±6.8 km[6]
16.26±0.01 h[7][a]
0.0545±0.016[6]
0.068±0.009[5]
D (Pan-STARRS)[8][9]
D (SDSS-MOC)[10]
B–V = 0.734±0.041[11]
V–R = 0.499±0.042[11]
V–I = 0.910±0.064[8]
Absolute magnitude (H)
10.0[5]
10.1[1][2][8]
10.26±0.25[9]

(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 (see Trojans in astronomy).[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 16.26±0.01 hours with a brightness amplitude of 0.31 magnitude (U=2+).[7][8][a]

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]

100+ largest Jupiter trojans

Notes[]

  1. ^ Jump up to: a b Lightcurve plot of (6545) 1986 TR6 from Mar 2013 by Robert Stephens at the Center for Solar System Studies (U81). Quality code is not available (lightcurve rating at CS3). Summary figures at the LCDB and CS3.

References[]

  1. ^ Jump up to: a b c d e f "6545 (1986 TR6)". Minor Planet Center. Retrieved 20 June 2018.
  2. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 6545 (1986 TR6)" (2016-07-06 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2018.
  3. ^ Jump up to: a b "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 20 June 2018.
  4. ^ Jump up to: a b "Asteroid (6545) 1986 TR6 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 20 June 2018.
  5. ^ 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. (online catalog)
  6. ^ Jump up to: a b c d "Asteroid (6545) 1986 TR6". Small Bodies Data Ferret. Retrieved 20 June 2018.
  7. ^ Jump up to: a b 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.
  8. ^ Jump up to: a b c d e f g h "LCDB Data for (6545)". Asteroid Lightcurve Database (LCDB). Retrieved 20 June 2018.
  9. ^ Jump up to: a b c 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339.
  10. ^ Jump up to: a b 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 30 October 2019. (PDS data set)
  11. ^ Jump up to: a b Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited". Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. S2CID 54776793.
  12. ^ Jump up to: a b "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 June 2018.

External links[]

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