astro.wikisort.org - Asteroid
14974 Počátky, provisional designation 1997 SK1, is a stony background asteroid from the middle region of the asteroid belt, approximately 4 kilometers in diameter. It was discovered by Czech astronomer Miloš Tichý at Kleť Observatory in the Czech Republic on 22 September 1997, and named for the Czech town Počátky.[8]
| Discovery[1] | |
|---|---|
| Discovered by | M. Tichý |
| Discovery site | Kleť Obs. |
| Discovery date | 22 September 1997 |
| Designations | |
MPC designation | (14974) Počátky |
Named after | Počátky (Czech town)[2] |
Alternative designations | 1997 SK1 · 1991 FF2 |
Minor planet category | main-belt · (middle)[3] background |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 26.13 yr (9,543 days) |
| Aphelion | 2.8575 AU |
| Perihelion | 2.4047 AU |
Semi-major axis | 2.6311 AU |
| Eccentricity | 0.0860 |
Orbital period (sidereal) | 4.27 yr (1,559 days) |
Mean anomaly | 100.11° |
Mean motion | 0° 13m 51.24s / day |
| Inclination | 3.8704° |
Longitude of ascending node | 338.42° |
Argument of perihelion | 158.25° |
| Physical characteristics | |
| Dimensions | 4.040±0.831 km[4][5] 4.88 km (calculated)[3] |
Synodic rotation period | 21.7079±0.0320 h[6] 21.7277±0.0320 h[6] |
Geometric albedo | 0.10 (assumed)[3] 0.226±0.100[4][5] |
Spectral type | S[3] |
Absolute magnitude (H) | 14.2[1][4] · 14.225±0.009 (R)[6] · 14.226±0.005 (R)[6] · 14.43±0.19[7] · 14.67[3] |
Classification and orbit
Počátky is a stony S-type asteroid, that orbits the Sun in the middle main-belt at a distance of 2.4–2.9 AU once every 4 years and 3 months (1,559 days). Its orbit has an eccentricity of 0.09 and an inclination of 4° with respect to the ecliptic.[1] A first precovery was taken at ESO's La Silla Observatory in 1991, extending the asteroid's observation arc by 6 years prior to its discovery.[8]
Physical characteristics
Two rotational lightcurves for this asteroid were obtained from photometric observations made at the U.S Palomar Transient Factory, California, in August 2010 and February 2012. The lightcurves gave a rotation period of 21.7277±0.0320 and 21.7079±0.0320 hours with a brightness amplitude of 0.57 and 0.68 in magnitude, respectively (U=2/2).[6]
According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Počátky measures 4.0 kilometers in diameter and its surface has an albedo of 0.23,[4][5] while the Collaborative Asteroid Lightcurve Link (CALL) assumes an untypically low albedo for stony asteroids of 0.10, and thus calculates a larger diameter of 4.9 kilometers.[3]
Naming
This minor planet was named after the south Bohemian town of Počátky, Czech Republic. It is the birthplace of the discoverer Miloš Tichý.[2] The approved naming citation was published by the Minor Planet Center on 11 November 2000 (M.P.C. 41572).[9]
References
- "JPL Small-Body Database Browser: 14974 Pocatky (1997 SK1)" (2017-05-05 last obs.). Jet Propulsion Laboratory. Retrieved 5 July 2017.
- Schmadel, Lutz D. (2007). "(14974) Počátky". Dictionary of Minor Planet Names – (14974) Počátky. Springer Berlin Heidelberg. p. 819. doi:10.1007/978-3-540-29925-7_9074. ISBN 978-3-540-00238-3.
- "LCDB Data for (14974) Pocatky". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
- 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 17 May 2016.
- Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 3 December 2016.
- 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 17 May 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 17 May 2016.
- "14974 Pocatky (1997 SK1)". Minor Planet Center. Retrieved 6 April 2016.
- "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- 14974 Počátky at AstDyS-2, Asteroids—Dynamic Site
- 14974 Počátky at the JPL Small-Body Database
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