50719 Elizabethgriffin
| Discovery [1] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 1 March 2000 |
| Designations | |
| (50719) 2000 EG140 | |
| 2000 EG140 · 2001 MV3 | |
| main-belt · Eunomia [2] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 17.54 yr (6,406 days) |
| Aphelion | 2.9325 AU |
| Perihelion | 2.2332 AU |
| 2.5828 AU | |
| Eccentricity | 0.1354 |
| 4.15 yr (1,516 days) | |
| 195.81° | |
| 0° 14m 14.64s / day | |
| Inclination | 14.297° |
| 262.91° | |
| 30.287° | |
| Physical characteristics | |
| Dimensions | 3.307 km[3] 3.40 km (calculated)[2] |
| 1256.0159±63.4351 h[4] | |
| 0.21 (assumed)[2] 0.3701±0.0649[3] | |
| S [2] | |
| 14.1[3] 14.2[1] 14.204±0.004 (R)[4] 14.40±0.18[5] 14.65[2] | |
(50719) 2000 EG140 is a stony Eunomian asteroid and exceptionally slow rotator from the inner regions of the asteroid belt, approximately 3.3 kilometers in diameter. It was discovered on 1 March 2000, by astronomers of the U.S. Catalina Sky Survey, at Mount Lemmon Observatory, Arizona.[6]
The stony S-type asteroid is a member of the Eunomia family, the most prominent family in the intermediate main-belt. It orbits the Sun at a distance of 2.2–2.9 AU once every 4 years and 2 months (1,516 days). Its orbit has an eccentricity of 0.14 and an inclination of 14° with respect to the ecliptic.[1] The first precovery was taken at Lowell Observatory (LONEOS) in 1998, extending the asteroid's observation arc by 2 years prior to its discovery.[6]
In August 2010, a rotational light-curve was obtained for this asteroid from photometric observations at the U.S. Palomar Transient Factory (PTF) in California. It gave a rotation period of 1256 hours with a brightness variation of 0.42 magnitude (U=2).[4] This makes the asteroid the 5th slowest rotating minor planet known to exist.
According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 3.3 kilometers in diameter and its surface has an albedo of 0.37[3] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 3.4 kilometers, based on an absolute magnitude of 14.65.[2]
References
- ^ a b c d "JPL Small-Body Database Browser: 50719 (2000 EG140)" (2016-04-30 last obs.). Jet Propulsion Laboratory. Retrieved 3 September 2016.
- ^ a b c d e f "LCDB Data for (50719)". Asteroid Lightcurve Database (LCDB). Retrieved 3 September 2016.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 3 September 2016.
- ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 3 September 2016.
- ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 3 September 2016.
- ^ a b "50719 (2000 EG140)". Minor Planet Center. Retrieved 3 September 2016.
External links
- 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 (50001)-(55000) – Minor Planet Center
- 50719 Elizabethgriffin at the JPL Small-Body Database
