(30704) Phegeus

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Asteroid
(30704) Phegeus
Properties of the orbit ( animation )
Epoch:  February 16, 2017 ( JD 2,457,800.5)
Orbit type Jupiter Trojan (L 5 )
Major semi-axis 5.2273  AU
eccentricity 0.0373
Perihelion - aphelion 5.0322 AU - 5.4224 AU
Inclination of the orbit plane 14.9116 °
Length of the ascending node 20.5149 °
Argument of the periapsis 287.8645 °
Sidereal period 11.95 a
Mean orbital velocity 13.09 km / s
Physical Properties
Medium diameter 27.002 ± 0.362 km
Albedo 0.088
Absolute brightness 11.3 mag
history
Explorer Cornelis Johannes van Houten ,
Ingrid van Houten-Groeneveld ,
Tom Gehrels
Date of discovery October 16, 1977
Another name 3250 T-3 , 1999 RG 246 , 2000 RN 38
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

(30704) Phegeus is an asteroid belonging to the group of Jupiter Trojans . This describes asteroids that orbit the sun on the Lagrange points on the orbit of the planet Jupiter . It is assigned to the Lagrange point L 5 , that is, (30704) Phegeus follows Jupiter in its orbit around the sun by 60 °.

The asteroid was discovered on October 16, 1977 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery took place during the 3rd Trojan survey, during which Tom Gehrels surveyed field plates recorded by the 120 cm Oschin Schmidt telescope of the Palomar observatory at the University of Leiden , 17 years after the start of the Palomar-Leiden- Surveys .

(30704) Phegeus was named on March 18, 2003 after Phegeus , a son of Dares who was a Hephaestus priest in Troy . In the case of asteroids, trailing Trojans are named after Trojan heroes.

See also

Web links