(99) Dike

Asteroid (99) Dike
3-dimensional model of 99 Dike based on light reflection curves.
Properties of the orbit ( animation )
Orbit type	Main belt asteroid
Major semi-axis	2,664  AU
eccentricity	0.197
Perihelion - aphelion	2.139 AU - 3.189 AU
Inclination of the orbit plane	13.9 °
Length of the ascending node	41.6 °
Argument of the periapsis	195.7 °
Time of passage of the perihelion	January 6, 2012
Sidereal period	4 a 127 d
Mean orbital velocity	18.1 km / s
Physical Properties
Medium diameter	72 km
Albedo	0.06
Rotation period	10.4 h
Absolute brightness	9.4 mag
Spectral class	C.
history
Explorer	A. Borrelly
Date of discovery	May 28, 1868
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.

(99) Dike is a main belt asteroid discovered by French astronomer Alphonse Borrelly in Marseille on May 28, 1868 .

The celestial body was named after Dike , one of the three ears from Greek mythology .

There are various details about the period of rotation of the body, which belongs to the C class of asteroids. A study by E. Sharidan in 2009 showed a pediode of 10.360h. In 2011 F. Pilcher determined a period of 18.127h.

See also

• List of asteroids

Individual evidence

1. ^ Discovery Circumstances: Numbered Minor Planets. The international Astronomical Union - Minor Planet Center, accessed July 26, 2020 . 
2. ↑ Lightcurve Results for 99 Dike, 313 Chaldaea, 872 Holda 1274 Delportia, and 7304 Namiki. The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 36, No. 2, p. 55–56 (2009), accessed July 27, 2020 . 
3. ↑ Rotation Period Determinations. The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 38, No. 4, p. 183-185 (2011), accessed July 27, 2020 .