(315898) 2008 QD4

(315898) 2008 QD₄, prov. designation: 2008 QD₄, is a centaur orbiting in the outer Solar System with a perihelion greater than Jupiter and a semi-major axis less than Saturn.

(315898) 2008 QD₄

Centaur 2008 QD4 (apmag 19) as seen with 24" telescope
Discovery
Discovered by	Mallorca Obs.
Discovery site	La Sagra Obs.
Discovery date	25 August 2008
Designations
MPC designation	(315898) 2008 QD4
Minor planet category	centaur[1][2][3]
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 1
Observation arc	2744 days (7.51 yr)
Aphelion	11.364 AU (1.7000 Tm) (Q)
Perihelion	5.4531 AU (815.77 Gm) (q)
Semi-major axis	8.4087 AU (1.25792 Tm) (a)
Eccentricity	0.35149 (e)
Orbital period (sidereal)	24.38 yr (8906.16 d)
Mean anomaly	79.666° (M)
Mean motion	0° 2m 25.516s / day (n)
Inclination	42.028° (i)
Longitude of ascending node	344.70° (Ω)
Argument of perihelion	68.923° (ω)
Earth MOID	4.6941 AU (702.23 Gm)
Jupiter MOID	1.46448 AU (219.083 Gm)
TJupiter	2.387
Physical characteristics
Mean diameter	31 km[4]
Geometric albedo	0.05 (assumed)[4]
Absolute magnitude (H)	11.4[1]

Perihelion

2008 QD₄ is listed as a centaur by the Minor Planet Center,^[3] Jet Propulsion Laboratory,^[1] and the Deep Ecliptic Survey (DES).^[2] Of numbered objects listed as a centaur by all 3 major institutions, (315898) 2008 QD₄ has the smallest perihelion distance.^[3]

It came to perihelion in August 2010.^[1]

Of objects listed as a centaur by all 3 major institutions, (315898) 2008 QD₄ has the smallest perihelion distance. Due to a 41° orbital inclination, it is above the ecliptic plane when crossing Jupiter's orbit, and below the ecliptic when crossing Saturn's orbit.

See also

• List of centaurs (small Solar System bodies) § 315898