(219774) 2001 YY145
| Discovery [1] | |
|---|---|
| Discovered by | LONEOS |
| Discovery site | Anderson Mesa Stn. |
| Discovery date | 18 December 2001 |
| Designations | |
| MPC designation | (219774) 2001 YY145 |
| 2001 YY145 · 2005 TA170 | |
| main-belt · (inner) [2] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 14.50 yr (5,297 days) |
| Aphelion | 2.9204 AU |
| Perihelion | 2.2409 AU |
| 2.5806 AU | |
| Eccentricity | 0.1316 |
| 4.15 yr (1,514 days) | |
| 265.44° | |
| 0° 14m 15.72s / day | |
| Inclination | 9.6009° |
| 315.62° | |
| 18.648° | |
| Physical characteristics | |
| Dimensions | 1.54 km (calculated)[2] |
| 1007.6706±86.3718 h[3] | |
| 0.20 (assumed)[2] | |
| S [2] | |
|
15.9[1] 15.977±0.011 (R)[3] 16.43[2] | |
|
| |
(219774) 2001 YY145 is a stony asteroid and exceptionally slow rotator from the inner regions of the asteroid belt, approximately 1.5 kilometers in diameter. It was discovered on 18 December 2001, by the U.S. Lowell Observatory Near-Earth-Object Search (LONEOS) at Anderson Mesa Station near Flagstaff, Arizona.[4]
The S-type asteroid orbits the Sun at a distance of 2.2–2.9 AU once every 4 years and 2 months (1,514 days). Its orbit has an eccentricity of 0.13 and an inclination of 10° with respect to the ecliptic.[1] The first precovery was taken at Lincoln Lab's ETS in October 2001, extending the asteroid's observation arc by 2 months prior to its discovery observation.[4]
A rotational light-curve was obtained for this asteroid from photometric observations at the Californian Palomar Transient Factory in October 2013. It gave a rotation period of 1007.7 hours with an estimated error margin of ±86 hours. According to the Light Curve Data Base, it is the 11th slowest rotating minor planet known to exist. Due to its high brightness variation of 0.86 magnitude, the body is likely to have a non-spheroidal shape (U=2).[3]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 1.54 kilometers, based on an absolute magnitude of 16.43.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 219774 (2001 YY145)" (2016-04-26 last obs.). Jet Propulsion Laboratory. Retrieved 13 September 2016.
- 1 2 3 4 5 6 "LCDB Data for (219774)". 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. - 1 2 "219774 (2001 YY145)". 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 (215001)-(220000) – Minor Planet Center
- (219774) 2001 YY145 at the JPL Small-Body Database