147 Protogeneia
Synodic rotation period | 7.8528 h (0.32720 d)[3][5] | |
| 0.0492±0.004[3] | ||
| Temperature | ~157 K | |
| C | ||
| 12.4 to 14.5 | ||
| 8.27[5] 8.8[3] | ||
Protogeneia (
Karl L. Littrow in allusion to the fact that this was the first asteroid discovered by an astronomer who was already known for work in other fields of astronomy.[6]
This object has a low
Tholen classification as a C-type asteroid,[8] which indicates that it has a dark surface and probably a primitive composition of carbonaceous
material.
Yunnan Observatory in China, finding a matching period of 7.852 hours and a brightness variation of 0.25 magnitude. They estimate the ratio of the lengths for the asteroid's major and minor axes is at least 1.26:1.[9]
There is one reported stellar occultation by Protogeneia, on May 28, 2002, from Texas.[citation needed]
References
- ^ 'Protogenea' in Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "The Asteroid Orbital Elements Database". astorb. Lowell Observatory.
- ^ NASA Jet Propulsion Laboratory, retrieved 6 May 2016.
- ^ . See Table 1.
- ^ ISSN 1052-8091.
- ISBN 3540002383.
- doi:10.1086/125066.
- Bibcode:1991KPCB....7f...8B.
- S2CID 55204167.
External links
- 147 Protogeneia at AstDyS-2, Asteroids—Dynamic Site
- 147 Protogeneia at the JPL Small-Body Database
