157 Dejanira
|
A three-dimensional model of 157 Dejanira based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | A. Borrelly |
| Discovery date | 1875 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch August 27, 2011 (JD 2455800.5) | |
| Aphelion | 461.730 Gm (3.086 AU) |
| Perihelion | 310.251 Gm (2.074 AU) |
| 385.991 Gm (2.580 AU) | |
| Eccentricity | 0.196 |
| 1513.824 d (4.14 a) | |
Average orbital speed | 18.36 km/s |
| 244.361° | |
| Inclination | 12.162° |
| 62.100° | |
| Physical characteristics | |
| Dimensions | 19.1 km |
| Mass | 7.3×1015 kg |
Mean density | 2.0 g/cm³ |
Equatorial surface gravity | 0.0053 m/s² |
Equatorial escape velocity | 0.0101 km/s |
| 0.10 | |
| Temperature | ~173 K |
| 10.6 | |
|
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157 Dejanira is a main belt asteroid that was discovered by Alphonse Borrelly on December 1, 1875, and named after the warlike princess Deianira in Greek mythology (Δηιάνειρα in Greek). The Dejanira family of asteroids is named after it.
Photometric observations of this asteroid were made in early 2009 at the Organ Mesa Observatory in Las Cruces, New Mexico. The resulting light curve shows a synodic rotation period of 15.825 ± 0.001 hours.[2]
References
- ↑ Yeomans, Donald K., "157 Dejanira", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30.
- ↑ Pilcher, Frederick (July 2009), "Rotation Period Determinations for 120 Lachesis, 131 Vala 157 Dejanira, and 271 Penthesilea", The Minor Planet Bulletin 36 (3), pp. 100–102, Bibcode:2009MPBu...36..100P.
External links
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