Astronomy:7440 Závist
| Discovery [1] | |
|---|---|
| Discovered by | M. Tichý |
| Discovery site | Kleť Obs. |
| Discovery date | 1 March 1995 |
| Designations | |
| (7440) Závist | |
| Named after | Oppidum Závist (Celtic oppidum)[2] |
| 1995 EA · 1980 PL4 | |
| Minor planet category | main-belt · (middle) |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.94 yr (13,128 days) |
| |{{{apsis}}}|helion}} | 3.0137 AU |
| |{{{apsis}}}|helion}} | 2.1599 AU |
| 2.5868 AU | |
| Eccentricity | 0.1650 |
| Orbital period | 4.16 yr (1,520 days) |
| Mean anomaly | 185.65° |
| Mean motion | 0° 14m 12.84s / day |
| Inclination | 10.967° |
| Longitude of ascending node | 147.88° |
| 319.65° | |
| Physical characteristics | |
| Dimensions | 5.05±0.61 km[3] 5.07 km (calculated)[4] |
| Rotation period | 7.4365±0.0023 h[5] |
| Geometric albedo | 0.20 (assumed)[4] 0.363±0.094[3] |
| S [4] | |
| Absolute magnitude (H) | 13.4[1] · 13.84[4] · 13.2[3] · 13.390±0.005 (R)[5] · 13.73±0.36[6] |
7440 Závist, provisional designation 1995 EA, is a stony asteroid from the middle region of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 1 March 1995, by Czech astronomer Miloš Tichý at Kleť Observatory in South Bohemia.[7] The asteroid was named for the Celtic Oppidum Závist.[2]
Orbit and classification
Závist orbits the Sun in the central main-belt at a distance of 2.2–3.0 AU once every 4 years and 2 months (1,520 days). Its orbit has an eccentricity of 0.17 and an inclination of 11° with respect to the ecliptic.[1] The first precovery was taken at Palomar Observatory in 1980, extending the asteroid's observation arc by 15 years prior to its discovery.[7]
Physical characteristics
Rotation period
A rotational lightcurve was obtained from photometric observations made at the U.S. Palomar Transient Factory in September 2010. It gave a rotation period of 7.4365±0.0023 hours with a brightness amplitude of 0.55 in magnitude ({{{1}}}).[5]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Závist measures 5.05 kilometers in diameter and its surface has an exceptionally high albedo of 0.363±0.094.[3] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a nearly identical diameter of 5.07 kilometers with an absolute magnitude of 13.84.[4]
Naming
This minor planet was named for the Oppidum Závist (Oppidum Závist), a Celtic settlement south of Prague in Bohemia.[2]
The ancient ruins are located on a hill above Vltava river (also see the minor planets 2367 Praha and 2123 Vltava). The site consists of two parts named "Hradiště" and "Šance". The settlement existed between the 6th century BC and 1st century AD, and represents part of the most outstanding remnants of known Celtic history in the Czech Republic, especially its ramparts and moats, as well as its acropolis.[2] The official naming citation was published by the Minor Planet Center on 4 May 1999 (M.P.C. 34625).[8]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 7440 Zavist (1995 EA)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2007440.
- ↑ 2.0 2.1 2.2 2.3 Schmadel, Lutz D. (2007). "(7440) Závist". Dictionary of Minor Planet Names – (7440) Závist. Springer Berlin Heidelberg. p. 597. doi:10.1007/978-3-540-29925-7_6490. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 17 May 2016.
- ↑ 4.0 4.1 4.2 4.3 4.4 "LCDB Data for (7440) Zavist". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=7440%7CZavist.
- ↑ 5.0 5.1 5.2 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 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. 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 17 May 2016.
- ↑ 7.0 7.1 "7440 Zavist (1995 EA)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=7440.
- ↑ "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 (5001)-(10000) – Minor Planet Center
- 7440 Závist at AstDyS-2, Asteroids—Dynamic Site
- 7440 Závist at the JPL Small-Body Database
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