(2100) Ra Shalom

from Wikipedia, the free encyclopedia
Asteroid
(2100) Ra Shalom
Properties of the orbit ( animation )
Orbit type near-Earth asteroid , Aten-type
Major semi-axis 0.832  AU
eccentricity 0.437
Perihelion - aphelion 0.469 AU - 1.195 AU
Inclination of the orbit plane 15.76 °
Length of the ascending node 170.86 °
Argument of the periapsis 356.02 °
Time of passage of the perihelion Template: FormatDate : Not a valid ISO date!Template: FormatDate / Maintenance / Error
Sidereal period 277  d
Mean orbital velocity 32.65 km / s
Physical Properties
Medium diameter ~ 1.7 km
Albedo 0.13 ± 0.03
Rotation period 19.8
Absolute brightness 16.1 mag
Spectral class C.
history
Explorer Eleanor Helin
Date of discovery September 10, 1978
Another name 1975 TB, 1978 RA
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.

(2100) Ra-Shalom is an asteroid from Aten type . This describes a group of asteroids whose orbits mostly run within the earth's orbit and cross it from within.

Ra-Shalom was discovered by Eleanor Helin at the Palomar Observatory in 1978 . The name is made up of the Egyptian sun god Ra and the Hebrew word for peace; he recalls the Camp David Agreement between Egypt and Israel .

Ra-Shalom moves on an eccentric orbit between 0.47 AU ( perihelion ) and 1.20 AU ( aphelion ) in 277 days around the sun . The orbital eccentricity is 0.44, the orbit is inclined 15.76 ° to the ecliptic .

Its size is estimated at 0.9 to 2.5 km. The albedo is 0.1. The asteroid rotates around its own axis in around 20 hours.

See also