(50719) 2000 EG140
| Discovery [1] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 1 March 2000 |
| Designations | |
| MPC designation | (50719) 2000 EG140 |
| 2000 EG140 · 2001 MV3 | |
| main-belt · Eunomia [2] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 18.44 yr (6,735 days) |
| Aphelion | 2.9328 AU |
| Perihelion | 2.2361 AU |
| 2.5844 AU | |
| Eccentricity | 0.1348 |
| 4.15 yr (1,518 days) | |
| 290.94° | |
| 0° 14m 13.92s / day | |
| Inclination | 14.297° |
| 262.85° | |
| 30.119° | |
| Physical characteristics | |
| Dimensions |
3.307 km[3][4] 3.40 km (calculated)[2] |
| 1256.0159±63.4351 h[5] | |
|
0.21 (assumed)[2] 0.370±0.065[3][4] | |
| S [2] | |
| 14.1[3] · 14.2[1] · 14.204±0.004 (R)[5] · 14.40±0.18[6] · 14.65[2] | |
|
| |
(50719) 2000 EG140 is a stony Eunomian asteroid and exceptionally slow rotator from the middle region 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.[7]
Classification and orbit
The stony S-type asteroid 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 (1,518 days). Its orbit has an eccentricity of 0.13 and an inclination of 14° with respect to the ecliptic.[1] A first precovery was taken at Lowell Observatory (LONEOS) in 1998, extending the asteroid's observation arc by 2 years prior to its discovery.[7]
Physical characteristics
Slow rotator
In August 2010, a rotational lightcurve 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).[5] This makes the asteroid the 5th slowest rotating minor planet known to exist.
Diameter and albedo
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][4] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.21 and calculates a diameter of 3.4 kilometers with an absolute magnitude of 14.65.[2]
Naming
As of 2017, this minor planet remains unnamed.[7]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 50719 (2000 EG140)" (2017-03-25 last obs.). Jet Propulsion Laboratory. Retrieved 28 May 2017.
- 1 2 3 4 5 6 "LCDB Data for (50719)". Asteroid Lightcurve Database (LCDB). Retrieved 3 September 2016.
- 1 2 3 4 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. Bibcode:2011ApJ...741...90M. arXiv:1109.6407
. doi:10.1088/0004-637X/741/2/90. Retrieved 3 September 2016. - 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. Bibcode:2011ApJ...741...68M. arXiv:1109.4096 . doi:10.1088/0004-637X/741/2/68. Retrieved 14 December 2016.
- 1 2 3 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. Bibcode:2015AJ....150...75W. arXiv:1504.04041 . 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. Bibcode:2015Icar..261...34V. arXiv:1506.00762 . doi:10.1016/j.icarus.2015.08.007. Retrieved 3 September 2016.
- 1 2 3 "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) 2000 EG140 at the JPL Small-Body Database
