21873 Jindřichůvhradec
| Discovery [1] | |
|---|---|
| Discovered by | J. Tichá M. Tichý |
| Discovery site | Kleť Observatory |
| Discovery date | 29 October 1999 |
| Designations | |
| 21873 Jindřichůvhradec | |
Named after | Jindřichův Hradec (Czech town)[2] |
| 1999 UU3 · 1982 SN8 1988 XA5 | |
| main-belt · (outer) [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 33.21 yr (12,131 days) |
| Aphelion | 3.8060 AU |
| Perihelion | 2.5004 AU |
| 3.1532 AU | |
| Eccentricity | 0.2070 |
| 5.60 yr (2,045 days) | |
| 18.878° | |
| 0° 10m 33.6s / day | |
| Inclination | 4.4626° |
| 238.02° | |
| 131.00° | |
| Physical characteristics | |
| Dimensions | 7.183±0.136 km[4] 10.44 km (calculated)[3] |
| 50.5874±0.0664 h[5] | |
| 0.057 (assumed)[3] 0.2368±0.0879[4] | |
| C [3] · X [6] | |
| 12.9[4] 12.90±0.17[6] 13.1[1] 13.184±0.005 (R)[5] 13.63[3] | |
21873 Jindřichůvhradec, provisional designation 1999 UU3, is a dark asteroid and relatively slow rotator from the outer region of the asteroid belt, approximately 8 kilometers in diameter. It was discovered by Czech astronomers Jana Tichá and Miloš Tichý at the South Bohemian Kleť Observatory on 29 October 1999.[7]
The asteroid orbits the Sun at a distance of 2.5–3.8 AU once every 5 years and 7 months (2,045 days). Its orbit has an eccentricity of 0.21 and an inclination of 4° with respect to the plane of the ecliptic.[1] The first precovery was obtained at Crimea–Nauchnij in 1982, extending the asteroid's observation arc by 17 years prior to its discovery.[7]
According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 7.2 kilometers in diameter and its surface has an albedo of 0.23.[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous C-type asteroids of 0.057, and calculates a diameter of 10.4 kilometers, as the lower the albedo, the larger a body's diameter, at a constant absolute magnitude.[3] A large-scale survey by Pan-STARRS, however, classifies the body as a X-type asteroid, which metallic core group has an intermediate albedo between stony and carbonaceous bodies.[6] In September 2010, a photometric light-curve analysis at the U.S. Palomar Transient Factory, California, gave a long rotation period of 50.5874±0.0664 hours with a brightness variation of 0.61 in magnitude (U=2).[5] This makes it a relatively slow rotator for an asteroid of its size, which normally have periods of just a few hours rather than several days.
The minor planet is named for Jindřichův Hradec, a south Bohemian town in the Czech Republic. Founded in the 13th century, it is known for its Renaissance château and Gothic church, which is exactly built on the 15th meridian east of Greenwich. A line marks the course of the meridian in its paving stones.[2] Naming citation was published on 28 January 2002 (M.P.C. 44595).[8]
References
- ^ a b c d "JPL Small-Body Database Browser: 21873 Jindrichuvhradec (1999 UU3)" (2015-12-06 last obs.). Jet Propulsion Laboratory. Retrieved April 2016.
{{cite web}}: Check date values in:|accessdate=(help) - ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (21873) Jindřichůvhradec. Springer Berlin Heidelberg. p. 868. ISBN 978-3-540-00238-3. Retrieved April 2016.
{{cite book}}: Check date values in:|accessdate=(help) - ^ a b c d e f "LCDB Data for (21873) Jindrichuvhradec". Asteroid Lightcurve Database (LCDB). Retrieved May 2016.
{{cite web}}: Check date values in:|accessdate=(help) - ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved May 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b c 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 May 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b c 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 May 2016.
{{cite journal}}: Check date values in:|access-date=(help) - ^ a b "21873 Jindrichuvhradec (1999 UU3)". Minor Planet Center. Retrieved April 2016.
{{cite web}}: Check date values in:|accessdate=(help) - ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved May 2016.
{{cite web}}: Check date values in:|accessdate=(help)
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 (20001)-(25000) – Minor Planet Center
- 21873 Jindřichůvhradec at the JPL Small-Body Database