Astronomy:4090 Říšehvězd
| Discovery [1] | |
|---|---|
| Discovered by | A. Mrkos |
| Discovery site | Kleť Obs. |
| Discovery date | 2 September 1986 |
| Designations | |
| (4090) Říšehvězd | |
| Named after | Říše hvězd (astronomy journal)[2] |
| 1986 RH1 · 1931 FF 1971 KB · 1982 KX 1988 AR3 · 1989 GU | |
| Minor planet category | main-belt · (inner) [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 86.03 yr (31,421 days) |
| |{{{apsis}}}|helion}} | 2.8513 AU |
| |{{{apsis}}}|helion}} | 1.8632 AU |
| 2.3573 AU | |
| Eccentricity | 0.2096 |
| Orbital period | 3.62 yr (1,322 days) |
| Mean anomaly | 252.91° |
| Mean motion | 0° 16m 20.28s / day |
| Inclination | 1.3288° |
| Longitude of ascending node | 266.55° |
| 4.4078° | |
| Physical characteristics | |
| Dimensions | 6.27 km (calculated)[3] 7.195±0.299 km[4][5] |
| Rotation period | 4.5312±0.0090 h (R)[6] 4.550±0.020 h (R)[7] 4.5553±0.0090 h (R)[6] |
| Geometric albedo | 0.149±0.032[4][5] 0.20 (assumed)[3] |
| S [3] | |
| Absolute magnitude (H) | 12.91±0.24[8] · 13.080±0.160 (R)[7] · 13.114±0.002 (R)[6] · 13.2[1] · 13.38[3] · 13.4[4] |
4090 Říšehvězd, provisional designation 1986 RH1, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter.
It was discovered by Czech astronomer Antonín Mrkos at Kleť Observatory on 2 September 1986. Named for the astronomy journal Říše hvězd, it is known as having had the most diacritics in its name among all named minor planets before the naming of 229762 Gǃkúnǁʼhòmdímà.[2][9]
Classification and orbit
The S-type asteroid orbits the Sun at a distance of 1.9–2.9 AU once every 3 years and 7 months (1,322 days). Its orbit has an eccentricity of 0.21 and an inclination of 1° with respect to the ecliptic.[1] The first observation was made at the U.S. Yerkes Observatory in 1931, extending the asteroid's observation arc by 55 years prior to its official discovery.[9]
Physical characteristics
In 2009 and 2014, several rotational lightcurves were obtained for this asteroid at the Palomar Transient Factory. They gave a concurring rotation period between 4.53 and 4.56 hours with a brightness variation between 0.32 and 0.41 magnitude ({{{1}}}).[6][7]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 7.2 kilometers in diameter and its surface has an albedo of 0.149,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 6.3 kilometers, based on an absolute magnitude of 13.38.[3]
Naming
This minor planet was named after the periodically released Czech popular astronomy journal Říše hvězd ("the realm of stars"), which was initially published by the Czech Astronomical Society.[2]
Říše hvězd reported discoveries in the fields of astronomy, astrophysics and space exploration and supplied information about the Czech–Slovak astronomical community. The body's name was proposed by Jana Tichá, Miloš Tichý and Zdeněk Moravec.[2] Naming citation was published on 28 August 1996 (M.P.C. 27734).[10]
See also
- Jiří Grygar, chairman of the Czech Astronomical Society and editor at Říše hvězd
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 4090 Risehvezd (1986 RH1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004090.
- ↑ 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(4090) Říšehvězd". Dictionary of Minor Planet Names – (4090) Říšehvězd. Springer Berlin Heidelberg. p. 349. doi:10.1007/978-3-540-29925-7_4067. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (4090) Říšehvězd". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4090%7CŘíšehvězd.
- ↑ 4.0 4.1 4.2 4.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ 5.0 5.1 5.2 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. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 5 December 2016.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 25 October 2016.
- ↑ 7.0 7.1 7.2 Chang, Chan-Kao (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series 219 (2): 19. doi:10.1088/0067-0049/219/2/27. Bibcode: 2015ApJS..219...27C. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJS..219...27C. Retrieved 25 October 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. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 25 October 2016.
- ↑ 9.0 9.1 "4090 Risehvezd (1986 RH1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4090.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
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 (1)-(5000) – Minor Planet Center
- 4090 Říšehvězd at the JPL Small-Body Database
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