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 | |
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) |
Aphelion | 2.7515 AU |
Perihelion | 2.1234 AU |
2.4374 AU | |
Eccentricity | 0.1289 |
3.81 yr (1,390 days) | |
347.07° | |
Inclination | 1.2136° |
278.36° | |
215.87° | |
Physical characteristics | |
Dimensions | 2.737±0.168 [4] [5] 3.26 km (calculated) [3] |
2.6556±0.1936 h [3] 2.8167±0.0127 h [6] 2.820±0.010 h [7] | |
0.20 (assumed) [3] 0.3108±0.0672 [4] 0.311±0.067 [5] | |
S [3] | |
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]
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]
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 ( U=2/2/2 ). [6] [7]
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]
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]