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
- 1 2 3 4 5 "JPL Small-Body Database Browser: 2005 TN74". Retrieved 2012-07-26.
- ↑ Most SDOs have a perihelion distance greater than 35AU and an eccentricity of more than 0.3.
- ↑ Orbit Fit and Astrometric record for 05TN74
- ↑ 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.
- ↑ 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.
- ↑ "Absolute Magnitude (H)". Retrieved 2008-05-11.
External links
- Orbital simulation from JPL (Java) / Ephemeris
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