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2797 Teucer

Trojan asteroid

Field	Value
minorplanet	yes
name	2797 Teucer
background	#C2FFFF
discovery_ref
discoverer	E. Bowell
discovery_site	Anderson Mesa Stn.
discovered	4 June 1981
mpc_name	(2797) Teucer
alt_names	1981 LK1940 YG
1978 EQ
adjective	Teucerian (Teucrian)
pronounced
named_after	Teucer (Greek mythology)
mp_category	Jupiter trojan
Greekbackground
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
uncertainty	0
observation_arc	77.40 yr (28,272 d)
aphelion	5.5519 AU
perihelion	4.6574 AU
semimajor	5.1046 AU
eccentricity	0.0876
period	11.53 yr (4,213 d)
mean_anomaly	173.90°
mean_motion	/ day
inclination	22.391°
asc_node	69.934°
arg_peri	49.042°
jupiter_moid	0.0174 AU
tisserand	2.8440
dimensions	(occ.)
mean_diameter

rotation
albedo

spectral_type	D (Pan-STARRS)
D (SDSS-MOC)
V–I
abs_magnitude	8.40
8.7

1978 EQ Greekbackground

D (SDSS-MOC) V–I
8.7

2797 Teucer is a large Jupiter trojan from the Greek camp, approximately 110 km in diameter. It was discovered on 4 June 1981, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States. The dark D-type asteroid belongs to the 20 largest Jupiter trojans and has a rotation period of 10.15 hours. It was named after the Greek hero and great archer, Teucer.

Orbit and classification

Teucer is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of its 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 4.7–5.6 AU once every 11 years and 6 months (4,213 days; semi-major axis of 5.1 AU). Its orbit has an eccentricity of 0.09 and an inclination of 22° with respect to the ecliptic.

The body's observation arc begins with its first observation as ** at Turku Observatory in December 1940, more than 40 years prior to its official discovery observation at Anderson Mesa.

Naming

This minor planet was named after the Greek hero Teucer, from Greek mythology. The son of King Telamon was a great archer and half-brother of Ajax, with whom he fought alongside in the Trojan War. The official naming citation was published by the Minor Planet Center on 17 February 1984 (M.P.C. 8543).

Physical characteristics

Teucer has been characterized as a dark D-type asteroid by Pan-STARRS' survey as well as in the SDSS-based taxonomy. It is also an assumed C-type asteroid.

Rotation period

Several rotational lightcurves of Teucer have been obtained from photometric observations since 1992. Analysis of the best-rated lightcurve from September 2010, by Daniel Coley at the Center for Solar System Studies gave a well-defined rotation period of hours with a brightness amplitude of 0.20 magnitude ().

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Teucer measures between 89.43 and 113.99 kilometers in diameter and its surface has an albedo between 0.059 and 0.073.

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0435 and a diameter of 110.72 kilometers based on an absolute magnitude of 8.8. In June 2014, an observed asteroid occultation gave a cross-section of (poor fit).

Notes

References

Noah Webster (1884) ''A Practical Dictionary of the English Language''

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.

jupiter-trojans-(greek-camp) discoveries-by-edward-l.-g.-bowell named-minor-planets astronomical-objects-discovered-in-1981

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