(469987) 2006 HJ₁₂₃

(469987) 2006 HJ₁₂₃
Discovery
Discovered by	Marc W. Buie
Discovery date	27 April 2006
Designations
Alternative designations	2006 HJ123
Minor planet category	TNO (plutino)
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 3
Observation arc	1838 days (5.03 yr)
Aphelion	51.444 AU (7.6959 Tm)
Perihelion	27.626 AU (4.1328 Tm)
Semi-major axis	39.535 AU (5.9144 Tm)
Eccentricity	0.30123
Orbital period (sidereal)	248.59 yr (90798.1 d)
Mean anomaly	309.05°
Mean motion	0° 0m 14.273s /day
Inclination	12.433°
Longitude of ascending node	222.53°
Time of perihelion	≈ 26 April 2051; ±1 days
Argument of perihelion	101.59°
Earth MOID	26.636 AU (3.9847 Tm)
Jupiter MOID	22.7401 AU (3.40187 Tm)
Physical characteristics
Dimensions	283.1+142.3; −110.8 km
Geometric albedo	0.136+0.308; −0.089
Temperature	~44 K
Absolute magnitude (H)	5.32 ± 0.66, 5.7

2006 HJ₁₂₃ (also written 2006 HJ123) is a trans-Neptunian object (TNO). It was discovered in 2006 by Marc W. Buie. The object is a plutino (in 2:3 resonance with Neptune).^[2]

The size of 2006 HJ₁₂₃ was measured by the Herschel Space Telescope to be 283⁺¹⁴²
₋₁₁₁ km.^[5]

References

^ "List Of Transneptunian Objects". IAU Minor Planet Center. Retrieved 14 May 2012.
^ ^a ^b Marsden, Brian G. (11 June 2006). "MPEC 2006-L50 : 2006 HF123, 2006 HG123, 2006 HH123, 2006 HJ123". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Retrieved 14 May 2012.
^ ^a ^b "JPL Small-Body Database Browser: (2006 HJ123)" (2012-05-14 last obs). Retrieved 30 March 2016.
^ JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
^ ^a ^b ^c ^d Mommert, Michael; Harris, A. W.; Kiss, C.; Pál, A.; Santos-Sanz, P.; Stansberry, J.; Delsanti, A.; Vilenius, E.; Müller, T. G.; Peixinho, N.; Lellouch, E.; Szalai, N.; Henry, F.; Duffard, R.; Fornasier, S.; Hartogh, P.; Mueller, M.; Ortiz, J. L.; Protopapa, S.; Rengel, M.; Thirouin, A. (May 2012). "TNOs are cool: A survey of the trans-Neptunian region—V. Physical characterization of 18 Plutinos using Herschel-PACS observations". Astronomy & Astrophysics. 541: A93. arXiv:1202.3657. Bibcode:2012A&A...541A..93M. doi:10.1051/0004-6361/201118562.