(31669) 1999 JT₆

(31669) 1999 JT6
Discovery
Discovered by	LINEAR
Discovery site	Lincoln Lab's ETS
Discovery date	12 May 1999
Designations
MPC designation	(31669) 1999 JT6
Minor planet category	NEO · Apollo · PHA
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 0
Observation arc	5209 days (14.26 yr)
Aphelion	3.3709 AU (504.28 Gm)
Perihelion	0.90316 AU (135.111 Gm)
Semi-major axis	2.1370 AU (319.69 Gm)
Eccentricity	0.57737
Orbital period (sidereal)	3.12 yr (1141.1 d)
Average orbital speed	.3158 deg/day
Mean anomaly	167.37°
Mean motion	0° 18m 55.8s / day
Inclination	9.5420°
Longitude of ascending node	78.848°
Argument of perihelion	39.099°
Earth MOID	0.000613623 AU (91,796.7 km)
Physical characteristics
Synodic rotation period	5.807 h (0.2420 d)
Absolute magnitude (H)	16.0

(31669) 1999 JT₆ is an Earth-crossing asteroid belonging to the Apollo family of asteroids which also crosses the orbit of Mars. 1999 JT6 is the asteroid's temporary discovery name. It has now been assigned a permanent number from the Minor Planet Center (31669) indicating that its orbit has been confirmed, but has not (at least so far) been assigned a name. Only a small fraction of asteroids have been named.

It has an Earth minimum orbit intersection distance of 0.00354 AU (328,978 miles), which is close enough to classify it as a potentially hazardous asteroid (PHA). It will make a close approach to Earth on 14 December 2076 at 0.0260 AU (2,506,321 miles) and an even closer approach to the minor planet Ceres on 16 Feb 2084 at 0.0171 AU (1,587,064 miles).