(470599) 2008 OG₁₉

(470599) 2008 OG₁₉ is a trans-Neptunian object and a possible dwarf planet located in the scattered disc.[3] It was discovered on 30 July 2008 through the Palomar Observatory.[4] It displays a large light curve amplitude of 0.437±0.011 magnitudes, implying that it is highly elongated in shape, similar to 20000 Varuna. Based on models for its light curve amplitude, they obtained an approximate density of 0.609 g/cm³ and aspect ratios of b/a = 0.513 and c/a = 0.39.[2]

(470599) 2008 OG₁₉

Discovery
Discovered by	Palomar Observatory team
Discovery site	Palomar Observatory
Discovery date	30 July 2008
Designations
MPC designation	(470599) 2008 OG19
Alternative designations	2008 OG19
Minor planet category	scattered disc
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	2596 days (7.11 yr)
Aphelion	94.004 AU (14.0628 Tm)
Perihelion	38.576 AU (5.7709 Tm)
Semi-major axis	66.290 AU (9.9168 Tm)
Eccentricity	0.41807
Orbital period	539.73 yr (197137 d)[1]
Mean anomaly	1.5681°
Mean motion	0° 0^m 6.574^s /day
Inclination	13.167°
Longitude of ascending node	164.02°
Argument of perihelion	140.53°
Physical characteristics
Dimensions	619+56 −113 km (assuming albedo of 0.081)[2] 394+57 −63 km (assuming albedo of 0.199)[2]
Mean density	0.609±0.004 g/cm^3[2] 0.544+0.042 −0.004 g/cm^3 (minimum)[2]
Sidereal rotation period	8.727±0.003 h[2]
Geometric albedo	0.081 (assumed as typical SDO albedo)[2] 0.199 (assumed)[2]
Spectral type	V–R=0.64[2]
Absolute magnitude (H)	4.39±0.07 (R-band)[2]

References

1. "JPL Small-Body Database Browser: 470599 (2008 OG19)" (2015-09-08 last obs.). Jet Propulsion Laboratory. Retrieved 1 August 2017.
2. Fernández-Valenzuela, Estela; Ortiz, Jose Luis; Duffard, René (2015). "2008 OG19: A highly elongated Trans-Neptunian Object". Monthly Notices of the Royal Astronomical Society. 456 (3): 2354–2360. arXiv:1511.06584. Bibcode:2016MNRAS.456.2354F. doi:10.1093/mnras/stv2739. S2CID 73720001.
3. "List of Known Trans-Neptunian objects". JohnstonsArchive. Retrieved 12 April 2015.
4. "470599 (2008 OG19)". Minor Planet Center. Retrieved 1 August 2017.

External links

• (470599) 2008 OG19 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters