405 Thia


405 Thia is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material. This object was discovered by Auguste Charlois on July 23, 1895, in Nice, and was named after Theia, a Titaness in Greek mythology.
In 2002, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.31 AU. The resulting data yielded an effective diameter of. NEOWISE data suggests the asteroid is 110 km in diameter.
On 4 May 1990 Thia passed from Earth and will pass that close again on 29 April 2073.
405 Thia currently has a Minimum orbit intersection distance with Earth of. On 2 June 2023 the asteroid reached perihelion.
Date & time of
closest approach		Earth distance
Sun distance
Velocity
wrt Earth
Velocity
wrt Sun
Uncertainty
region
Reference
2023-03-20 19:406.823.3± 16 km