2005 TN74

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2005 TN74
Discovery
Discovered by Scott S. Sheppard, Chad Trujillo
Designations
2005 TN74
3:5 resonant TNO
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc 1805 days (4.94 yr)
Aphelion 52.49343 AU (7.852905 Tm)
Perihelion 32.11131 AU (4.803784 Tm)
42.30237 AU (6.328344 Tm)
Eccentricity 0.24091
275.14 yr (100495 d)
351.03607°
0° 0m 12.896s /day
Inclination 2.17385°
179.25692°
224.79728°
Earth MOID 31.1197 AU (4.65544 Tm)
Jupiter MOID 27.1241 AU (4.05771 Tm)
Physical characteristics
Dimensions 85–240 km
7.3[1]

2005 TN74 (also written 2005 TN74) is a trans-Neptunian object (TNO)[2] in a 3:5 resonance with Neptune.[3][4] It was discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2005.

It was initially suspected of being a Neptune trojan since the first observations gave it a semi-major axis of 30 AU and an orbital eccentricity of 0.16,[5] but further observations showed it to have a semi-major axis of 42.7 AU, a perihelion of 32.1 AU, and an aphelion of 53.4 AU.[1]

With an absolute magnitude of 7.2,[1] it has an expected diameter in the range of 85 to 240 km.[6]

It has been observed 19 times over four oppositions.[1]

References[edit]

  1. ^ a b c d e "JPL Small-Body Database Browser: 2005 TN74". Retrieved 30 March 2016. 
  2. ^ Most SDOs have a perihelion distance greater than 35AU and an eccentricity of more than 0.3.
  3. ^ Orbit Fit and Astrometric record for 05TN74
  4. ^ Wasserman, L. H.; Buie, M. W.; Marsden, B. G. (2006-10-05). "MPEC 2006-T35 : 2005 PR21, 2005 PT21, 2005 PU21, 2005 TN74". Minor Planet Center. Retrieved 2008-05-12. 
  5. ^ Sheppard, S. S.; Trujillo, C. A.; Marsden, B. G. (2005-10-31). "MPEC 2005-U97 : 2005 TN74, 2005 TO74". Minor Planet Center. Retrieved 2008-05-12. 
  6. ^ "Absolute Magnitude (H)". Retrieved 2008-05-11. 

External links[edit]