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5027 Androgeos

Asteroid in the orbit of Jupiter

Field	Value
minorplanet	yes
name	5027 Androgeos
background	#C2FFFF
image	005027-asteroid shape model (5027) Androgeos.png
caption	Shape model of Androgeos from its lightcurve
discovery_ref
discoverer	C. Shoemaker
discovery_site	Palomar Obs.
discovered	21 January 1988
mpc_name	(5027) Androgeos
alt_names
adjective	Androge(i)an
pronounced
named_after	Androgeos
(Greek mythology)
mp_category	Jupiter trojan
Greekbackground
orbit_ref
epoch	31 May 2020 (JD 2459000.5)
uncertainty	0
observation_arc	67.75 yr (24,747 d)
aphelion	5.6520 AU
perihelion	4.9516 AU
semimajor	5.3018 AU
eccentricity	0.0660
period	12.21 yr (4,459 d)
mean_anomaly	284.47°
mean_motion	/ day
inclination	31.445°
asc_node	78.221°
arg_peri	344.641°
jupiter_moid	0.1283 AU
tisserand	2.7000
mean_diameter

rotation
albedo

spectral_type	D (Pan-STARRS)
D (SDSS-MOC)
V–I
abs_magnitude	9.4
9.6

(Greek mythology) Greekbackground

D (SDSS-MOC) V–I
9.6

5027 Androgeos is a large Jupiter trojan from the Greek camp, approximately 59 km in diameter. It was discovered on 21 January 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The dark D-type asteroid is one of the 70 largest Jupiter trojans and has a rotation period of 11.4 hours. It was named after the warrior Androgeos from Greek mythology, who was killed by Aeneas.

Orbit and classification

Androgeos is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance . It is also a non-family asteroid in the Jovian background population.

It orbits the Sun at a distance of 4.95–5.65 AU once every 12 years and 3 months (4,459 days; semi-major axis of 5.30 AU). Its orbit has an eccentricity of 0.07 and an inclination of 31° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Palomar.

Naming

This minor planet was named, by the discoverer, after the Greek warrior Androgeos from Greek mythology, who was killed by Aeneas in the burning city of Troy. Aeneas and his Trojan men then took the armor of Androgeos and his killed troops to disguise themselves and escape to safety. The official naming citation was published by the Minor Planet Center on 4 June 1993 (M.P.C. 22248).

Physical characteristics

Androgeos has been characterized as a dark D-type asteroid by Pan-STARRS' survey and in the SDSS-based taxonomy.

Rotation period

In May 2016, a rotational lightcurve of Androgeos was obtained from photometric observations by Robert Stephens at the Center for Solar System Studies in California. Lightcurve analysis gave a rotation period of hours with a brightness amplitude of 0.37 magnitude ().

This result supersedes similar period determinations with an amplitude of 0.31 and 0.64 by Stefano Mottola (1992) Stephens (2015), respectively ().

Diameter and albedo

According to the survey carried out by the Infrared Astronomical Satellite IRAS and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Androgeos measures 57.86 and 59.79 kilometers in diameter and its surface has an albedo of 0.091 and 0.071, respectively. The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0767 and a diameter of 57.68 kilometers based on an absolute magnitude of 9.6.

Notes

References

Noah Webster (1884) ''A Practical Dictionary of the English Language''
(October 2016). "Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies". Minor Planet Bulletin. link
(January 2016). "Large L5 Jovian Trojan Asteroid Lightcurves from the Center for Solar System Studies". Minor Planet Bulletin. link

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.

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