(39546) 1992 DT5
| Discovery [1] | |
|---|---|
| Discovered by | UESAC |
| Discovery site | La Silla Obs. |
| Discovery date | 29 February 1992 |
| Designations | |
| MPC designation | (39546) 1992 DT5 |
| 1992 DT5 · 1999 TA162 | |
| main-belt · (outer) [2] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24.27 yr (8,864 days) |
| Aphelion | 2.8584 AU |
| Perihelion | 2.7239 AU |
| 2.7911 AU | |
| Eccentricity | 0.0241 |
| 4.66 yr (1,703 days) | |
| 148.39° | |
| 0° 12m 41.04s / day | |
| Inclination | 5.2627° |
| 150.60° | |
| 305.35° | |
| Physical characteristics | |
| Dimensions | 5.34 km (calculated)[2] |
| 1167.3602±100.0594 h[3] | |
| 0.057 (assumed)[2] | |
| C [2] | |
|
14.641±0.007 (R)[3] 14.7[1] 14.88±0.30[4] 15.09[2] | |
|
| |
(39546) 1992 DT5 is a carbonaceous asteroid and exceptionally slow rotator from the outer region of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 29 February 1992, by the Uppsala–ESO Survey of Asteroids and Comets (UESAC) at ESO's La Silla astronomical observatory site in northern Chile.[5]
The C-type asteroid orbits the Sun at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,703 days). Its orbit has an eccentricity of 0.02 and an inclination of 5° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with its discovery observation in February 1992.[5]
In September 2013, a rotational light-curve was obtained for this asteroid from photometric observations at the U.S Palomar Transient Factory in California. It gave a rotation period of 1167 hours with an estimated error margin of ±100 hours. According to the Light Curve Data Base (LCDB),[2] it is the 8th slowest rotating minor planet known to exist. With a high amplitude of 0.80 magnitude for its light-curve, the body is likely to have a non-spheroidal shape (U=2).[3]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 5.3 kilometers, based on an absolute magnitude of 15.09.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 39546 (1992 DT5)" (2016-06-06 last obs.). Jet Propulsion Laboratory. Retrieved 13 September 2016.
- 1 2 3 4 5 6 7 "LCDB Data for (39546)". Asteroid Lightcurve Database (LCDB). Retrieved 13 September 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. arXiv:1504.04041
. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 13 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. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 13 September 2016.
- 1 2 "39546 (1992 DT5)". Minor Planet Center. Retrieved 13 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 (35001)-(40000) – Minor Planet Center
- (39546) 1992 DT5 at the JPL Small-Body Database