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1869 Philoctetes

Trojan asteroid

Field	Value
minorplanet	yes
name	1869 Philoctetes
background	#C2FFFF
discovery_ref
discovered	24 September 1960
discoverer	C. J. van Houten
I. van Houten-G.
T. Gehrels
discovery_site	Palomar Obs.
mpc_name	(1869) Philoctetes
alt_names	4596 P-L
pronounced
named_after	Philoctetes
(Greek mythology)
mp_category	Jupiter trojan
(Greek camp)
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	56.61 yr (20,677 days)
aphelion	5.5755 AU
perihelion	4.8600 AU
semimajor	5.2178 AU
eccentricity	0.0686
period	11.92 yr (4,353 days)
mean_anomaly	247.19°
inclination	3.9745°
asc_node	43.984°
arg_peri	321.66°
jupiter_moid	0.0807 AU
tisserand	2.9900
dimensions	km
albedo
abs_magnitude	11.2

I. van Houten-G. T. Gehrels (Greek mythology) (Greek camp)

1869 Philoctetes is a Jupiter trojan from the Greek camp, approximately 23 kilometers in diameter.

It was discovered on September 24, 1960, by the Dutch and Dutch–American astronomers Cornelis van Houten, Ingrid van Houten-Groeneveld and Tom Gehrels at Palomar Observatory on Palomar Mountain, California. The asteroid was named after Philoctetes from Greek mythology. On the same night, the same group also discovered 1868 Thersites.

Orbit and classification

Philoctetes orbits in the Lagrangian point of the Sun–Jupiter system, in the "Greek Camp" of Trojan asteroids. It orbits the Sun at a distance of 4.9–5.6 AU once every 11 years and 11 months (4,353 days). Its orbit has an eccentricity of 0.07 and an inclination of 4° with respect to the ecliptic.

Physical characteristics

According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Philoctetes measures 22.7 kilometers in diameter, and its surface has an albedo of 0.104.

As of 2017, the body's rotation period and shape remain unknown.

Survey designation

The survey designation P-L stands for Palomar–Leiden, named after Palomar Observatory and Leiden Observatory, which collaborated on the fruitful Palomar–Leiden survey in the 1960s. Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld at Leiden Observatory. The trio are credited with several thousand asteroid discoveries.

Naming

This minor planet was named after the Greek mythological figure Philoctetes, famed archer and participant in the Trojan War, where he killed Paris, son of the Trojan King Priam. The official was published by the Minor Planet Center on 1 June 1975 (M.P.C. 3826).

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.

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