(189) Phthia Main-belt Asteroid
Discovered on 9 September 1878 by C. H. F. Peters at Clinton.
Where Phthia is today
Seen from above the solar system on 2026-10-14: Phthia is 2.53 au from the Sun and 3.47 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 189 |
| Provisional designation | A878 RA |
| Orbit class | Main-belt Asteroid |
| Diameter | 38.5 km (#1,015 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.170 |
| Rotation period | 22.3 hours |
| Spectral type | S |
| Absolute magnitude (H) | 9.37 |
| Orbital period | 3.83 years |
| Semi-major axis | 2.45 au |
| Perihelion – aphelion | 2.36 – 2.54 au |
| Eccentricity | 0.0374 |
| Inclination | 5.17° |
| Closest distance between its orbit and Earth's (MOID) | 1.36 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
More named asteroids discovered by C. H. F. Peters
- (72) Feronia
- (75) Eurydike
- (77) Frigga
- (85) Io
- (88) Thisbe
- (92) Undina
- (98) Ianthe
- (102) Miriam
- (109) Felicitas
- (111) Ate
- (112) Iphigenia
- (114) Kassandra
← (188) Menippe · (190) Ismene →