Astronomy:(50719) 2000 EG140
| Discovery [1] | |
|---|---|
| Discovered by | CSS |
| Discovery site | Mount Lemmon Obs. |
| Discovery date | 1 March 2000 |
| Designations | |
| (50719) 2000 EG140 | |
| 2000 EG140 · 2001 MV3 | |
| Minor planet category | main-belt · Eunomia [2] Maria |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 18.44 yr (6,735 days) |
| |{{{apsis}}}|helion}} | 2.9328 AU |
| |{{{apsis}}}|helion}} | 2.2361 AU |
| 2.5844 AU | |
| Eccentricity | 0.1348 |
| Orbital period | 4.15 yr (1,518 days) |
| Mean anomaly | 290.94° |
| Mean motion | 0° 14m 13.92s / day |
| Inclination | 14.297° |
| Longitude of ascending node | 262.85° |
| 30.119° | |
| Physical characteristics | |
| Dimensions | 3.307 km[3][4] 3.40 km (calculated)[2] |
| Rotation period | 1256.0159±63.4351 h[5] |
| Geometric albedo | 0.21 (assumed)[2] 0.370±0.065[3][4] |
| S [2] | |
| Absolute magnitude (H) | 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 ({{{1}}}).[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]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 20 November 2002.[8] As of 2018, it has not been named.[7]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 50719 (2000 EG140)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2050719. Retrieved 28 May 2017.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "LCDB Data for (50719)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/GenerateALCDEFPage_Local.php?AstInfo=50719%7C. Retrieved 3 September 2016.
- ↑ 3.0 3.1 3.2 3.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. https://arxiv.org/pdf/1109.6407v1.pdf. Retrieved 3 September 2016.
- ↑ 4.0 4.1 4.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 14 December 2016.
- ↑ 5.0 5.1 5.2 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 3 September 2016.
- ↑ 7.0 7.1 7.2 "50719 (2000 EG140)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=50719. Retrieved 3 September 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 24 February 2018.
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
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