2483 Guinevere

Guinevere

Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg
Discovery date	17 August 1928
Designations
MPC designation	2483
Named after	Guinevere
Alternative names	1928 QB
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	87.29 yr (31882 days)
Aphelion	5.0769684 AU (759.50366 Gm)
Perihelion	2.8680238 AU (429.05025 Gm)
Semi-major axis	3.972496 AU (594.2769 Gm)
Eccentricity	0.2780298
Orbital period	7.92 yr (2892.0 d)
Mean anomaly	290.07215°
Mean motion	0° 7^m 28.138^s / day
Inclination	4.498974°
Longitude of ascending node	252.05604°
Argument of perihelion	183.36129°
Earth MOID	1.88252 AU (281.621 Gm)
Jupiter MOID	0.231371 AU (34.6126 Gm)
Jupiter Tisserand parameter	2.983
Physical characteristics
Dimensions	44 km[1]
Mean radius	22.085 ± 1.95 km
Rotation period	14.733 h (0.6139 d)
Sidereal rotation period	14.733 h[1]
Geometric albedo	0.0433 ± 0.009[1]
Absolute magnitude (H)	10.8[1]

2483 Guinevere (1928 QB) is a 44 km outer main-belt asteroid discovered on August 17, 1928 by Max Wolf at Heidelberg.^[1] It is a member of the Hilda family of asteroids that are in a 3:2 orbital resonance with Jupiter. In a 1998 numerical integration by Dahlgren, Guinevere was the Hilda asteroid with the greatest chance of impacting with another asteroid.^[2] About 74% of the impact risk occurs when Guinevere is relatively close to perihelion and approaches the main-belt asteroids.

References

1. "JPL Small-Body Database Browser: 2483 Guinevere". Jet Propulsion Laboratory. Retrieved 15 April 2016.
2. Dahlgren, M. (1998). "A study of Hilda asteroids. III. Collision velocities and collision frequencies of Hilda asteroids". Astronomy and Astrophysics. 336: 1056–1064. Bibcode:1998A&A...336.1056D.

• Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.

External links

• 2483 Guinevere at the JPL Small-Body Database
  
  • Discovery · Orbit diagram · Orbital elements · Physical parameters