2015 SO2

2015 SO2
Discovery
Discovered byČrni Vrh Obs.
Discovery date21 September 2015
Designations
2015 SO2
Orbital characteristics[2][3][4]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 1
Observation arc342 days
Aphelion1.10688036 AU (165.586945 Gm)
Perihelion0.890962 AU (133.2860 Gm)
0.99892124 AU (149.436491 Gm)
Eccentricity0.108076
1.00 yr (364.66602 d)
208.3767°
0° 59m 13.937s / day
Inclination9.1750°
182.9293°
290.0678°
Earth MOID0.0191611 AU (2.86646 Gm)
Physical characteristics
50–111 m[a][5]
23.9[2]

2015 SO2 (astronomical naming convention: 2015 SO2) is an Aten asteroid that is a temporary horseshoe companion to the Earth, the ninth known Earth horseshoe librator.[6] Prior to its most recent close encounter with our planet (2015 September 30) it was an Apollo asteroid.

  1. ^ List Of Aten Minor Planets
  2. ^ a b c "2015 SO2". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3728565. Retrieved 4 April 2016.
  3. ^ AstDys-2 on 2015 SO2 Retrieved 2015-11-28
  4. ^ NEODyS-2 on 2015 SO2 Retrieved 2015-11-28
  5. ^ Cite error: The named reference h was invoked but never defined (see the help page).
  6. ^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). "From horseshoe to quasi-satellite and back again: the curious dynamics of Earth co-orbital asteroid 2015 SO2". Astrophysics and Space Science. 361 (1): 16. arXiv:1511.08360. Bibcode:2016Ap&SS.361...16D. doi:10.1007/s10509-015-2597-8. S2CID 189842725.