(50719) 2000 EG140

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(50719) 2000 EG140
Discovery [1]
Discovered by CSS
Discovery site Mount Lemmon Obs.
Discovery date 1 March 2000
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)
0° 14m 13.92s / day
Inclination 14.297°
Physical characteristics
Dimensions 3.307 km[3][4]
3.40 km (calculated)[2]
1256.0159±63.4351 h[5]
0.21 (assumed)[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[edit]

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[edit]

Slow rotator[edit]

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[edit]

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[edit]

This minor planet was numbered by the Minor Planet Center on 20 November 2002.[8] As of 2018, it has not been named.[7]


  1. ^ a b c d "JPL Small-Body Database Browser: 50719 (2000 EG140)" (2017-03-25 last obs.). Jet Propulsion Laboratory. Retrieved 28 May 2017. 
  2. ^ a b c d e f "LCDB Data for (50719)". Asteroid Lightcurve Database (LCDB). Retrieved 3 September 2016. 
  3. ^ 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 3 September 2016. 
  4. ^ a b c 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. arXiv:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 14 December 2016. 
  5. ^ 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 3 September 2016. 
  6. ^ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 3 September 2016. 
  7. ^ a b c "50719 (2000 EG140)". Minor Planet Center. Retrieved 3 September 2016. 
  8. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018. 

External links[edit]