2020 HA₁₀

2020 HA₁₀
Discovery
Discovered by	Mount Lemmon Survey
Discovery site	Mount Lemmon Obs.
Discovery date	28 April 2020; (first observed only)
Designations
MPC designation	2020 HA10
Minor planet category	NEO · Atira
Orbital characteristics
	Epoch 30 April 2020 (JD 2458969.5)
	Uncertainty parameter 8
Observation arc	5 days
Aphelion	0.9471 AU
Perihelion	0.6937 AU
Semi-major axis	0.8204 AU
Eccentricity	0.1544
Orbital period (sidereal)	0.74 yr (271.4 d)
Mean anomaly	117.5°
Mean motion	1° 19m 33.6s / day
Inclination	49.66°
Longitude of ascending node	103.46°
Argument of perihelion	27.1°
Earth MOID	0.087 AU
Physical characteristics
Mean diameter	100–500 m (est. at 0.05–0.15)
Absolute magnitude (H)	19.1±0.8

2020 HA₁₀ is a near-Earth object of the Atira group. It was discovered at G=20.4 mag on 2020 April 28 by the Mount Lemmon Survey using the 0.5 m reflector + 10 K CCD.^[3]

2020 HA₁₀ orbits the Sun at a distance of 0.7–0.9 AU once every 9 months (271 days; semi-major axis of 0.82 AU). Its orbit has an eccentricity of 0.15 and an unusually high inclination of 50° with respect to the ecliptic.^[2] The orbital evolution of 2020 HA₁₀ leads the object into the Aten orbital realm periodically.^[4]

References

^ ^a ^b "2020 HA10". Minor Planet Center. Retrieved 17 August 2020.
^ ^a ^b ^c "JPL Small-Body Database Browser: (2020 HA10)" (2020-05-03 last obs.). Jet Propulsion Laboratory. Retrieved 17 August 2020.
^ "MPEC 2020-J11 : 2020 HA10". Minor Planet Electronic Circular. 1 May 2020. Retrieved 18 August 2020.
^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (30 July 2020). "Near the Edge of the Atira Orbital Realm: Short-term Dynamical Evolution of 2020 HA₁₀ and 2020 OV₁". Research Notes of the American Astronomical Society. 4 (7): 123. Bibcode:2020RNAAS...4..123D. doi:10.3847/2515-5172/abaa4f. S2CID 225388347.

External links

2020 HA10 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
2020 HA10 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[MPC-object-1] "2020 HA10". Minor Planet Center. Retrieved 17 August 2020.

[jpldata-2] "JPL Small-Body Database Browser: (2020 HA10)" (2020-05-03 last obs.). Jet Propulsion Laboratory. Retrieved 17 August 2020.

[MPEC-3] "MPEC 2020-J11 : 2020 HA10". Minor Planet Electronic Circular. 1 May 2020. Retrieved 18 August 2020.

[de_la_Fuente_Marcos-2020-4] Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (30 July 2020). "Near the Edge of the Atira Orbital Realm: Short-term Dynamical Evolution of 2020 HA₁₀ and 2020 OV₁". Research Notes of the American Astronomical Society. 4 (7): 123. Bibcode:2020RNAAS...4..123D. doi:10.3847/2515-5172/abaa4f. S2CID 225388347.

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