(5836) 1993 MF
| Discovery [1] | |
|---|---|
| Discovered by | E. F. Helin K. J. Lawrence |
| Discovery site | Palomar Obs. |
| Discovery date | 22 June 1993 |
| Designations | |
| (5836) 1993 MF | |
| 1993 MF | |
| Amor · NEO [1][2] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.34 yr (12,907 days) |
| Aphelion | 3.7496 AU |
| Perihelion | 1.1315 AU |
| 2.4406 AU | |
| Eccentricity | 0.5364 |
| 3.81 yr (1,393 days) | |
| 3.9539° | |
| 0° 15m 30.6s / day | |
| Inclination | 7.9487° |
| 238.78° | |
| 77.997° | |
| Earth MOID | 0.1844 AU |
| Physical characteristics | |
| Dimensions | 2.79 km (derived)[3] 3.8 km[4] |
| 4.948±0.005 h[a] 4.9543±0.0002 h[b] 4.959 h[4] 4.96±0.01 h[5] | |
| 0.20 (assumed)[3] | |
| SMASS = S [1] · S [3] | |
| 14.65±0.2 (R)[b] 14.7[1] 15.01±0.16[5] 15.03±0.05[4] 15.141±0.139[3][6] 15.43±0.40[7] | |
(5836) 1993 MF is a highly eccentric, stony asteroid, classified as a near-Earth object of the Amor group of asteroids, approximately 3 kilometers in diameter. It was discovered on 22 June 1993, by American astronomers Eleanor Helin and Kenneth Lawrence at the U.S. Palomar Observatory in California.[2]
The stony S-type asteroid orbits the Sun at a distance of 1.1–3.7 AU once every 3 years and 10 months (1,393 days). Its orbit has an eccentricity of 0.54 and an inclination of 8° with respect to the ecliptic.[1] It has an Earth minimum orbital intersection distance of nearly 0.184 AU (27,500,000 km)*, which corresponds to 71.8 lunar distances. As it crosses the orbit of Mars, it may also be classified as a Mars-crosser, and, on 28 November 2023, it will pass 0.02535 AU (3,792,000 km) from the Red Planet.[1] The first precovery was taken at the Australian Siding Spring Observatory in 1981, extending the body's observation arc by 12 years prior to its discovery.[2]
Since the 1990s, and up to June 2016, four well-defined rotational light-curves were obtained for this asteroid from photometric observations, giving a rotation period of approximately 4.95 hours with a high brightness variation between 0.53 and 0.82 in magnitude, indicating that the asteroid has a non-spheroidal shape. In the 1990s, Italian astronomer Stefano Mottola obtained a light-curve at La Silla during the EUNEASO, a European near-Earth object search and follow-up observation program to determine additional physical parameters (U=3).[4] Further light-curves were obtained by Polish astronomer Wiesław Z. Wiśniewski at UA's LPL in October 1993, and by Czech astronomer Petr Pravec at Ondřejov Observatory in September 1997 (U=3/3).[5][b] In June 2016, the fourth and most recent photometric observation was made by American astronomer Brian D. Warner at his Palmer Divide Station, Colorado, which gave a period of 4.948±0.005 hours with an amplitude of 0.82 in magnitude (U=3).[a]
While in the 1990s, Stefano Mottola estimated the asteroid to measure 3.8 kilometers in diameter (H = 15.03),[4] the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a shorter diameter of 2.8 kilometers, based on an absolute magnitude of 15.14.[3]
References
- ^ a b Warner (2016) web: observation date: 2016-06-07. Rotation period of 4.948±0.005 hours with a brightness amplitude of 0.82 mag (U=3). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (5836)
- ^ a b c Pravec (1997) web: observation date: 1997-11-04. Rotation period of 4.948±0.005 hours with a brightness amplitude of 0.74 mag and an absolute magnitude of 14.65 in the R-band (U=3). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (5836) and Pravec, P.; Wolf, M.; Sarounova, L. (1997)
- ^ a b c d e f g "JPL Small-Body Database Browser: 5836 (1993 MF)" (2016-08-27 last obs.). Jet Propulsion Laboratory. Retrieved 30 August 2016.
- ^ a b c "5836 (1993 MF)". Minor Planet Center. Retrieved 30 August 2016.
- ^ a b c d e "LCDB Data for (5836)". Asteroid Lightcurve Database (LCDB). Retrieved 30 August 2016.
- ^ a b c d e Mottola, S.; de Angelis, G.; di Martino, M.; Erikson, A.; Harris, A. W.; Hahn, G.; et al. (March 1995). "The EUNEASO Photometric Follow-up Program". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1003M. Retrieved 30 August 2016.
- ^ a b c Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved 30 August 2016.
- ^ Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved 30 August 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 30 August 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 (5001)-(10000) – Minor Planet Center
- (5836) 1993 MF at the JPL Small-Body Database
