Girish Mahajan (Editor)

103 Hera

Updated on
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Discovered by  James Craig Watson
Alternative names  1927 CV, 1950 CM
Observation arc  144.99 yr (52958 d)
Orbits  Sun
Discoverer  James Craig Watson
Discovery site  Detroit Observatory
Discovery date  7 September 1868
Minor planet category  Main belt
Discovered  7 September 1868
Spectral type  S-type asteroid
Named after  Hera
Aphelion  2.92042 AU (436.889 Gm)
Similar  80 Sappho, 114 Kassandra, 399 Persephone, 128 Nemesis, 161 Athor

103 Hera is a moderately large main-belt asteroid that was discovered by Canadian-American astronomer James Craig Watson on September 7, 1868, and named after Hera, queen and fifth in power of the Olympian gods in Greek mythology. It is an S-type asteroid with a silicate surface composition.

Photometric observations made in 2010 at the Organ Mesa Observatory at Las Cruces, New Mexico, and the Hunters Hill Observatory at Ngunnawal, Australian Capital Territory, give a synodic rotation period of 23.740 ± 0.001 hours. The bimodal light curve shows a maximum brightness variation of 0.45 ± 0.03 in magnitude.

Measurements made with the IRAS observatory give a diameter of 91.58 ± 4.14 km and a geometric albedo of 0.19 ± 0.02. By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 88.30 ± 8.51 km and a geometric albedo of 0.20 ± 0.04. When the asteroid was observed occulting a star, the results showed a diameter of 89.1 ± 1.1 km.


103 Hera Wikipedia