2005 TN74

From Wikipedia, the free encyclopedia
Jump to: navigation, search
2005 TN74
Discovery
Discovered by Scott S. Sheppard, Chad Trujillo
Designations
2005 TN74
3:5 resonant TNO
Orbital characteristics[1]
Epoch September 30, 2012
Aphelion 53.36325 AU
Perihelion 32.12130 AU
42.74228 AU
Eccentricity 0.24849
279.44 yr
347.25631°
Inclination 2.16681°
179.16811°
224.40180°
Physical characteristics
Dimensions 85–240 km
7.2[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 2012-07-26. 
  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]