|Discovered by||Eugene Delporte|
|Discovery date||February 12, 1936|
|Other names||1936 CA|
|Category||Apollo, Mars crosser|
|Reference date October 22, 2004 (JD 2453300.5)|
|Longest distance from the Sun||494.673 Gm (3.307 AU)|
|Shortest distance from the Sun||65.906 Gm (0.441 AU)|
|Longest distance from the center of its orbital path
|280.289 Gm (1.874 AU)|
|How long it takes to complete an orbit||936.742 d (2.56 a)|
|Average speed||18.10 km/s|
|Angle above the reference plane
|Size and other qualities|
|Measurements||0.5—1.2 km 1|
|Average density||2.0? g/cm³|
|Surface gravity||0.0001—0.0003 m/s²|
|Escape velocity||0.0003—0.0006 km/s|
|Rotation period||? d|
|How much light it reflects||0.20—0.04 1|
|Avg. surface temp.||197—207 K|
2101 Adonis was one of the first near-Earth asteroids to be found. It was found by Eugene Delporte in 1936 and named after Adonis, the beautiful youth with whom the goddess Venus fell in love. Adonis is thought to measure about 1 km in diameter.
In the close approach that led to the first time it was found, not enough sightings could be made to find out it's orbit, and Adonis was lost until 1977 when it was found once again by Charles T. Kowal.
It comes within 30 Gm of the Earth six times in the 21st century, the nearest being 5.3 Gm in 2036.