(5476) 1989 TO11

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(5476) 1989 TO11
Discovery[1]
Discovered byS. J. Bus
Discovery siteCTIO
Discovery date2 October 1989
Designations
(5476) 1989 TO11
1989 TO11 · 1990 UW13
Minor planet category
Jupiter trojan[1][2]
Trojan[3] · background[4]
Orbital characteristics[2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc65.65 yr (23,980 d)
Aphelion5.4814 AU
Perihelion4.7357 AU
5.1086 AU
Eccentricity0.0730
11.55 yr (4,217 d)
235.27°
0° 5m 7.44s / day
Inclination13.704°
198.55°
95.356°
Jupiter MOID0.1169 AU
TJupiter2.9390
Physical characteristics
Mean diameter
35.10±0.47 km[5]
5.780±0.001 h[6]
0.099±0.019[5]
C (assumed)[7]
Absolute magnitude (H)
10.4[5]
10.6[1][2][7]

(5476) 1989 TO11, provisional designation 1989 TO11 is a mid-sized Jupiter trojan from the Trojan camp, approximately 35 kilometers (22 miles) in diameter. It was discovered on 2 October 1989, by American astronomer Schelte Bus at the Cerro Tololo Inter-American Observatory in Chile.[1] The dark Jovian asteroid has a rotation period of 5.8 hours. It has not been named since its numbering in March 1993.[8]

Classification and orbit[]

1989 TO11 is a Jupiter trojan which stays in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's L5 Lagrangian point, 60° behind its orbit (see Trojans in astronomy).[3] It is also a non-family asteroid of the Jovian background population.[4]

It orbits the Sun at a distance of 4.7–5.5 AU once every 11 years and 7 months (4,217 days; semi-major axis of 5.11 AU). Its orbit has an eccentricity of 0.07 and an inclination of 14° with respect to the ecliptic.[2] The asteroid was first observed at Palomar Observatory in August 1952. One year later, the body's observation arc begins at Palomar in August 1953, or more than 36 years prior to its official discovery observation at Cerro Tololo.[1]

Physical characteristics[]

1989 TO11 is an assumed C-type asteroid.[7] Jovian asteroids are typically D-types, with the remainder being mostly carbonaceous C- and primitive P-type asteroids.

Rotation period[]

Four nights of photometric observations of this asteroid were used to build a lightcurve showing a rotation period of 5.780±0.001 hours with a brightness variation of 0.30 magnitude. The well-defined lightcurve was obtained during February 1994 by Stefano Mottola and Anders Erikson using the ESO 1-metre telescope at the La Silla Observatory in Chile (U=3).[6][7]

Diameter and albedo[]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 35.1 kilometers in diameter and its surface has an albedo of 0.099,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a larger diameter of 42.2 kilometers.[7]

100+ largest Jupiter trojans

Numbering and naming[]

This minor planet was numbered by the Minor Planet Center on 8 March 1993 (M.P.C. 21774).[8] As of 2018, it has not been named.[1]

References[]

  1. ^ Jump up to: a b c d e f "5476 (1989 TO11)". Minor Planet Center. Retrieved 22 June 2018.
  2. ^ Jump up to: a b c d "JPL Small-Body Database Browser: 5476 (1989 TO11)" (2018-04-20 last obs.). Jet Propulsion Laboratory. Retrieved 22 June 2018.
  3. ^ Jump up to: a b "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 22 June 2018.
  4. ^ Jump up to: a b "Asteroid (5476) 1989 TO11 – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 22 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 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.
  7. ^ Jump up to: a b c d e "LCDB Data for (5476)". Asteroid Lightcurve Database (LCDB). Retrieved 22 June 2018.
  8. ^ Jump up to: a b "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 22 June 2018.

External links[]

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