(385695) 2005 TO74

2005 TO₇₄

Discovery
Discovery date	8 October 2005[1]
Designations
Minor planet category	Trojan asteroid
Orbital characteristics[2][3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	3661 days (10.02 yr)
Aphelion	31.677 AU (4.7388 Tm)
Perihelion	28.441 AU (4.2547 Tm)
Semi-major axis	30.059 AU (4.4968 Tm)
Eccentricity	0.053826
Orbital period	164.81 yr (60195.5 d)
Mean anomaly	278.95°
Mean motion	0° 0^m 21.53^s / day
Inclination	5.2607°
Longitude of ascending node	169.470°
Argument of perihelion	307.37°
Earth MOID	27.4601 AU (4.10797 Tm)
Jupiter MOID	23.1858 AU (3.46855 Tm)
Jupiter Tisserand parameter	4.953
Physical characteristics
Dimensions	~100 km
Absolute magnitude (H)	8.3[2]

(385695) 2005 TO₇₄ (also written 2005 TO74) is the fourth Neptune trojan discovered.^[4] It orbits near Neptune's L₄ Lagrangian point about 60 degrees ahead of Neptune and thus has the about same orbital period as Neptune. The Neptune-resonance should keep it more than 19 AU from Neptune for 14,000 years.^[1] As of 2016, it is 25.5 AU from Neptune. 2005 TO₇₄ is located close to the boundary separating stable orbits from unstable ones, and it may be influenced by a secular resonance.^[5] It was discovered by Scott S. Sheppard and Chadwick A. Trujillo on 8 October 2005 near apparent magnitude 23.^[1]

References

1. MPEC 2005-U97 : 2005 TN74, 2005 TO74
2. "JPL Small-Body Database Browser: 385695 (2005 TO74)". Retrieved 12 April 2016.
3. AstDys-2 about 2005 TO₇₄
4. List Of Neptune Trojans
5. Zhou, Li-Yong; Dvorak, Rudolf; Sun, Yi-Sui (2011). "The dynamics of Neptune Trojans – II. Eccentric orbits and observed objects". Monthly Notices of the Royal Astronomical Society 430 (3): 1849–1860. arXiv:1007.5362. Bibcode:2011MNRAS.410.1849Z. doi:10.1111/j.1365-2966.2010.17566.x.

External links

• (385695) 2005 TO74 at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters