145534 Jhongda
| Discovery [1] | |
|---|---|
| Discovered by |
T.-C. Yang Q.-Z. Ye |
| Discovery site | Lulin Obs. |
| Discovery date | 1 April 2006 |
| Designations | |
| MPC designation | 145534 Jhongda |
Named after | National Central University (in Taiwan)[2] |
| 2006 GJ | |
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.44 yr (8,562 days) |
| Aphelion | 3.0901 AU |
| Perihelion | 2.3236 AU |
| 2.7069 AU | |
| Eccentricity | 0.1416 |
| 4.45 yr (1,627 days) | |
| 85.351° | |
| 0° 13m 16.68s / day | |
| Inclination | 6.2015° |
| 105.82° | |
| 189.52° | |
| Physical characteristics | |
| Dimensions | 3.54 km (calculated)[3] |
| 4.490±0.040 h[4] | |
| 0.057 (assumed)[3] | |
| C [3] | |
|
15.5[5] · 15.530±0.230 (R)[4] 15.6[1] · 15.75±0.39[6] 15.98[3] | |
|
| |
145534 Jhongda, provisional designation 2006 GJ, is a carbonaceous asteroid from the middle region of the asteroid belt, approximately 3.5 kilometers in diameter. It was discovered by Taiwanese astronomers Yang Tingzhang and Ye Quanzhi at Lulin Observatory on 1 April 2006.[2]
The C-type asteroid orbits the Sun at a distance of 2.3–3.1 AU once every 4 years and 5 months (1,627 days). Its orbit has an eccentricity of 0.14 and an inclination of 6° with respect to the ecliptic.[1] The first precovery was taken at Steward Observatory (Kitt Peak) in 1992, extending the asteroid's observation arc by 14 years prior to its discovery.[2]
In January 2014, a rotational light-curve was obtained for this asteroid from photometric observation at the Palomar Transient Factory in California. It gave a rotation period of 4.490±0.040 hours with a brightness variation of 0.67 in magnitude (U=2).[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 3.54 kilometers, based on an absolute magnitude of 15.98.[3]
The minor planet was named after the Taiwanese National Central University, which controls the discovering Lulin Observatory. "Jhongda" is the University's abbreviation in Mandarin Chinese.[2] Naming citation was published on 2 April 2007 (M.P.C. 59389).[7]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 145534 Jhongda (2006 GJ)" (2015-08-05 last obs.). Jet Propulsion Laboratory. Retrieved 2 December 2016.
- 1 2 3 4 "145534 Jhongda (2006 GJ)". Minor Planet Center. Retrieved 12 September 2016.
- 1 2 3 4 5 6 "LCDB Data for (145534) Jhongda". Asteroid Lightcurve Database (LCDB). Retrieved 12 September 2016.
- 1 2 3 Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series. 219 (2): 19. arXiv:1506.08493
. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved 12 September 2016. - ↑ Tholen (20 April 2008). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0. Planetary Data System. Retrieved 12 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 12 September 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 12 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 (145001)-(150000) – Minor Planet Center
- 145534 Jhongda at the JPL Small-Body Database
