Discovered by C. H. F. Peters Observation arc 136.18 yr (49739 d) Perihelion 2.3597 AU (353.01 Gm) Discovered 9 September 1878 Discovery site Litchfield Observatory | Discovery date 9 September 1878 Aphelion 2.5415 AU (380.20 Gm) Semi-major axis 2.4506 AU (366.60 Gm) Orbits Sun Asteroid group Asteroid belt | |
Discoverer Christian Heinrich Friedrich Peters Spectral type S-type asteroid (Asteroid spectral types) Similar 188 Menippe, 167 Urda, 196 Philomela, 165 Loreley, 264 Libussa | ||
189 Phthia is a bright-coloured, rocky main belt asteroid that was discovered by German-American astronomer Christian Heinrich Friedrich Peters on September 9, 1878 in Clinton, New York and named after Phthia, a region of Ancient Greece.
Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico during 2008 gave a light curve with a period of 22.346 ± 0.001 hours and a brightness variation of 0.26 ± 0.02 in magnitude.
References
189 Phthia Wikipedia(Text) CC BY-SA