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2939 Coconino

Stony Nysian asteroid from the inner regions of the asteroid belt

Field	Value
minorplanet	yes
name	2939 Coconino
background	#D6D6D6
discovery_ref
discovered	21 February 1982
discoverer	E. Bowell
discovery_site	Anderson Mesa Stn.
mpc_name	(2939) Coconino
alt_names	1982 DP

named_after	Coconino County
(U.S. county in Arizona)
mp_category	main-beltNysa
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	40.69 yr (14,861 days)
aphelion	2.8399 AU
perihelion	2.0394 AU
semimajor	2.4396 AU
eccentricity	0.1641
period	3.81 yr (1,392 days)
mean_anomaly	47.539°
inclination	3.9489°
asc_node	349.97°
arg_peri	237.31°
dimensions	km
9.40 km (calculated)
rotation	h
albedo	0.20 (assumed)

spectral_type	S
abs_magnitude	12.512.6

(U.S. county in Arizona) 9.40 km (calculated)

2939 Coconino, provisional designation , is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 6 kilometers in diameter. It was discovered on 21 February 1982, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station in Flagstaff, United States. It is named after the Coconino County in Arizona.

Orbit and classification

Coconino is a stony S-type asteroid and a member of the main-belt's Nysa family, which is named after its largest member 44 Nysa. It orbits the Sun in the inner main-belt at a distance of 2.0–2.8 AU once every 3 years and 10 months (1,392 days). Its orbit has an eccentricity of 0.16 and an inclination of 4° with respect to the ecliptic. It was first identified as at McDonald Observatory in 1952, extending the body's observation arc by 30 years prior to its official discovery observation at Flagstaff.

Physical characteristics

Rotation period

In February 2005, a rotational lightcurve of Coconino was obtained from photometric observations by astronomer Horácio Correia. Lightcurve analysis gave a well-defined rotation period of 4.68138 hours with a brightness amplitude of 0.46 magnitude ().

Diameter and albedo

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Coconino measures 5.607 kilometers in diameter and its surface has a high albedo of 0.512, while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and consequently calculates a larger diameter of 9.40 kilometers, using an absolute magnitude of 12.5.

Naming

This minor planet was named after the U.S. Coconino County, Arizona, of which the city of Flagstaff with its discovering observatory is the county seat. The word "Coconino" derives from the language of the Hopi Tribe of Arizona. The official naming citation was published by the Minor Planet Center on 17 February 1984 (M.P.C. 8544).

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

nysa-asteroids discoveries-by-edward-l.-g.-bowell named-minor-planets astronomical-objects-discovered-in-1982

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