(50719) 2000 EG140

(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 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

    1. 1 2 3 4 "JPL Small-Body Database Browser: 50719 (2000 EG140)" (2016-04-30 last obs.). Jet Propulsion Laboratory. Retrieved 3 September 2016.
    2. 1 2 3 4 5 6 "LCDB Data for (50719)". Asteroid Lightcurve Database (LCDB). Retrieved 3 September 2016.
    3. 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. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 3 September 2016.
    4. 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. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 3 September 2016.
    5. ↑ 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.
    6. 1 2 "50719 (2000 EG140)". Minor Planet Center. Retrieved 3 September 2016.

    External links

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