Astronomy:31641 Cevasco
| Discovery [1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 6 April 1999 |
| Designations | |
| (31641) Cevasco | |
| Named after | Hannah Olivia Cevasco (Broadcom MASTERS awardee)[2] |
| 1999 GW34 · 1993 RR14 | |
| Minor planet category | main-belt · (inner) [3] Nysa |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 23.42 yr (8,554 days) |
| |{{{apsis}}}|helion}} | 2.7515 AU |
| |{{{apsis}}}|helion}} | 2.1234 AU |
| 2.4374 AU | |
| Eccentricity | 0.1289 |
| Orbital period | 3.81 yr (1,390 days) |
| Mean anomaly | 347.07° |
| Inclination | 1.2136° |
| Longitude of ascending node | 278.36° |
| 215.87° | |
| Physical characteristics | |
| Dimensions | 2.737±0.168[4][5] 3.26 km (calculated)[3] |
| Rotation period | 2.6556±0.1936 h[3] 2.8167±0.0127 h[6] 2.820±0.010 h[7] |
| Geometric albedo | 0.20 (assumed)[3] 0.3108±0.0672[4] 0.311±0.067[5] |
| S [3] | |
| Absolute magnitude (H) | 14.8[1][3] · 14.940[7] |
31641 Cevasco (provisional designation 1999 GW34) is a stony Nysian asteroid from the inner regions of the asteroid belt, approximately 3.3 kilometers in diameter. It was discovered on 6 April 1999, by the Lincoln Near-Earth Asteroid Research project at Lincoln Laboratory's Experimental Test Site in Socorro, New Mexico, United States. The asteroid was named for Hannah Cevasco, a 2015 Broadcom MASTERS awardee.[2]
Orbit and classification
Cevasco orbits the Sun in the inner main-belt at a distance of 2.1–2.8 AU once every 3 years and 10 months (1,390 days). Its orbit has an eccentricity of 0.13 and an inclination of 1° with respect to the ecliptic.[1]
The asteroid's observation arc begins 6 years prior to its official discovery observation, with its first identification as 1993 RR14 at ESO's La Silla Observatory in 1993.[2]
Physical characteristics
Lightcurves
Three rotational lightcurves of Cevasco were obtained from photometric observations at the Palomar Transient Factory between 2010 and 2014. Lightcurve analysis gave a rotation period of 2.6556, 2.8167 and 2.820 hours with a brightness variation of 0.71, 0.48 and 0.54 magnitude, respectively ({{{1}}}).[6][7]
Diameter and albedo
According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Cevasco measures 2.7 kilometers in diameter and its surface has an albedo of 0.311,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a stony asteroid of 0.20 and calculates a diameter of 3.3 kilometers with an absolute magnitude of 14.8.[3]
Naming
This minor planet was named in honor of Hannah Olivia Cevasco (born 2000) finalist in the 2015 Broadcom MASTERS, a math and science competition for middle school students, for her medicine and health sciences project. At the time she attended the St. Charles School in California.[2]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 31641 Cevasco (1999 GW34)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2031641.
- ↑ 2.0 2.1 2.2 2.3 "31641 Cevasco (1999 GW34)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=31641.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (31641) Cevasco". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=31641%7CCevasco.
- ↑ 4.0 4.1 4.2 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.
- ↑ 6.0 6.1 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.
- ↑ 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.
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 (30001)-(35000) – Minor Planet Center
- 31641 Cevasco at AstDyS-2, Asteroids—Dynamic Site
- 31641 Cevasco at the JPL Small-Body Database
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