Astronomy:157 Dejanira
From HandWiki
Short description: Main-belt asteroid
.png) A three-dimensional model of 157 Dejanira based on its light curve. | |
| Discovery[1] | |
|---|---|
| Discovered by | A. Borrelly |
| Discovery date | 1 December 1875 |
| Designations | |
| (157) Dejanira | |
| Pronunciation | /dɛdʒəˈnaɪərə/[2] |
| A875 XA; 1904 VB; 1978 TS1 | |
| Minor planet category | Main belt |
| Orbital characteristics[3][4] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 111.13 yr (40590 d) |
| |{{{apsis}}}|helion}} | 3.0852 astronomical unit|AU (461.54 Gm) |
| |{{{apsis}}}|helion}} | 2.07801 AU (310.866 Gm) |
| 2.58161 AU (386.203 Gm) | |
| Eccentricity | 0.19507 |
| Orbital period | 4.15 yr (1515.1 d) |
| Average Orbital speed | 18.36 km/s |
| Mean anomaly | 312.135° |
| Mean motion | 0° 14m 15.396s / day |
| Inclination | 12.160° |
| Longitude of ascending node | 62.070° |
| 46.282° | |
| Earth MOID | 1.11241 AU (166.414 Gm) |
| Jupiter MOID | 2.16656 AU (324.113 Gm) |
| TJupiter | 3.366 |
| 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 |
| Rotation period | 15.825 h (0.6594 d) |
| Geometric albedo | 0.10 |
| Physics | ~173 K |
| Absolute magnitude (H) | 11.2 |
Dejanira (minor planet designation: 157 Dejanira) is a main belt asteroid that was discovered by Alphonse Borrelly on 1 December 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.[5]
References
- ↑ "Discovery Circumstances: Numbered Minor Planets". The International Astronomical Union Minor Planet Center. https://minorplanetcenter.net//iau/lists/NumberedMPs.html. Retrieved 17 March 2021.
- ↑ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
- ↑ Yeomans, Donald K., "157 Dejanira", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=157, retrieved 12 May 2016.
- ↑ "The Asteroid Orbital Elements Database". Lowell Observatory. http://ftp.lowell.edu/pub/elgb/astorb.html.
- ↑ 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
- Lightcurve plot of 157 Dejanira, Palmer Divide Observatory, B. D. Warner (2005)
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 157 Dejanira at AstDyS-2, Asteroids—Dynamic Site
- 157 Dejanira at the JPL Small-Body Database
 |  |
