49777 Cappi
| Discovery [1] | |
|---|---|
| Discovered by | P. G. Comba |
| Discovery site | Prescott Obs. |
| Discovery date | 2 December 1999 |
| Designations | |
| 49777 Cappi | |
Named after | Margaret Comba (discoverer's wife)[2] |
| 1999 XS · 2001 KD31 | |
| main-belt · (inner) [3] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24.76 yr (9,042 days) |
| Aphelion | 2.5137 AU |
| Perihelion | 2.1981 AU |
| 2.3559 AU | |
| Eccentricity | 0.0670 |
| 3.62 yr (1,321 days) | |
| 129.43° | |
| 0° 16m 21.36s / day | |
| Inclination | 4.4685° |
| 237.62° | |
| 341.84° | |
| Physical characteristics | |
| Dimensions | 1.85 km (calculated)[3] |
| 5.9389±0.0018 h[4] | |
| 0.20 (assumed)[3] | |
| S [3] | |
| 15.6[1] 15.92±0.23[5] 15.575±0.010 (R)[4] 16.02[3] | |
49777 Cappi, provisional designation 1999 XS, is a stony asteroid from the inner regions of the asteroid belt, approximately 2 kilometers in diameter. It was discovered on 2 December 1999, by Italian–American astronomer Paul Comba at the U.S. Prescott Observatory in Arizona.[6]
The assumed S-type asteroid orbits the Sun at a distance of 2.2–2.5 AU once every 3 years and 7 months (1,321 days). Its orbit has an eccentricity of 0.07 and an inclination of 4° with respect to the ecliptic.[1] The first precovery was taken at Steward Observatory (Kitt Peak) in 1991, extending the asteroid's observation arc by 8 years prior to its discovery.[6]
A rotational light-curve was obtained from photometric observation made in September 2013, at the Palomar Transient Factory in California. It showed a rotation period of 5.9389±0.0018 hours with a brightness amplitude of 0.78 in magnitude (U=2).[4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 1.85 kilometers, based on an absolute magnitude of 16.02.[3]
The minor planet was named after Margaret Capitola Sonntag Comba (b. 1940), a psychologist and art therapist by profession, faculty member at Prescott College, and wife of the discoverer.[6] Naming citation was published on 4 May 2004 (M.P.C. 51981).[7]
References
- ^ a b c d "JPL Small-Body Database Browser: 49777 Cappi (1999 XS)" (2016-06-15 last obs.). Jet Propulsion Laboratory. Retrieved 2 December 2016.
- ^ Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (49777) Cappi, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 215. ISBN 978-3-540-34360-8. Retrieved 28 April 2016.
- ^ a b c d e f "LCDB Data for (49777) Cappi". Asteroid Lightcurve Database (LCDB). Retrieved 28 April 2016.
- ^ a b c 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 28 April 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 28 April 2016.
- ^ a b c "49777 Cappi (1999 XS)". Minor Planet Center. Retrieved 28 April 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 28 April 2016.
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 (45001)-(50000) – Minor Planet Center
- 49777 Cappi at the JPL Small-Body Database
