2015 HM10

2015 HM₁₀
Discovery
Discovered by	DeCam–DES
Discovery site	Cerro Tololo Obs.
Discovery date	19 April 2015
Designations
MPC designation	2015 HM10
Minor planet category	NEO · Apollo; Amor
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 3
Observation arc	0.39 yr (141 days)
Aphelion	4.0411 AU
Perihelion	1.0085 AU
Semi-major axis	2.5248 AU
Eccentricity	0.6006
Orbital period (sidereal)	4.01 yr (1,465 days)
Mean anomaly	195.53°
Mean motion	0° 14m 44.52s / day
Inclination	1.4699°
Longitude of ascending node	283.27°
Argument of perihelion	353.48°
Earth MOID	0.0022 AU · 0.9 LD
Physical characteristics
Dimensions	0.057 km (calculated)
Synodic rotation period	0.3761±0.0001 h; 0.3763±0.0003 h
Geometric albedo	0.20 (assumed)
Spectral type	S (assumed)
Absolute magnitude (H)	23.6

2015 HM₁₀ is an irregular shaped asteroid and sub-kilometer near-Earth object that passed near the Earth on 7 July 2015, at a distance of 442,000 kilometers or 1.15 lunar distances.

First observed on 19 April 2015, by astronomers of the Dark Energy Survey at Cerro Tololo Observatory in Chile, the asteroid measures approximately 60 meters in diameter and is classified as a member of the Apollo and Amor group, respectively. It is a fast rotator with a rotation period of 22.6 minutes.

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