Astronomy: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 | |
| Minor planet category | main-belt · (inner) [3] background [4] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 24.96 yr (9,115 days) |
| |{{{apsis}}}|helion}} | 2.5138 AU |
| |{{{apsis}}}|helion}} | 2.1982 AU |
| 2.3560 AU | |
| Eccentricity | 0.0670 |
| Orbital period | 3.62 yr (1,321 days) |
| Mean anomaly | 183.85° |
| Mean motion | 0° 16m 21s / day |
| Inclination | 4.4688° |
| Longitude of ascending node | 237.61° |
| 341.93° | |
| Physical characteristics | |
| Mean diameter | 1.85 km (calculated)[3] |
| Rotation period | 5.9389±0.0018 h[5] |
| Geometric albedo | 0.20 (assumed)[3] |
| S (assumed)[3] | |
| Absolute magnitude (H) | 15.6[1] · 15.92±0.23[6] · 15.575±0.010 (R)[5] · 16.02[3] |
49777 Cappi (provisional designation 1999 XS) is a stony background asteroid from the inner regions of the asteroid belt, approximately 2 kilometers in diameter.
The asteroid was discovered on 2 December 1999, by Italian–American astronomer Paul Comba at the Prescott Observatory in Arizona, United States.[7] It was named after the discoverer's wife, Margaret Capitola Sonntag Comba.[2]
Orbit and classification
Cappi is a non-family from the main belt's background population.[4] It orbits the Sun in the inner asteroid belt at a distance of 2.2–2.5 AU once every 3 years and 7 months (1,321 days; semi-major axis of 2.36 AU). Its orbit has an eccentricity of 0.07 and an inclination of 4° with respect to the ecliptic.[1]
The asteroid's observation arc begins 8 years prior to its official discovery observation, with a precovery taken by the Steward Observatory's Spacewatch survey at Kitt Peak in September 1991.[7]
Physical characteristics
Cappi is an assumed stony S-type asteroid.[3]
Rotation and shape
In September 2013, a rotational lightcurve of Cappi was obtained from photometric observation taken in the R-band at the Palomar Transient Factory in California. It showed a rotation period of 5.9389 hours with a brightness amplitude of 0.78 magnitude ({{{1}}}), indicating a non-spheroidal shape.[5]
Diameter and albedo estimate
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 1.85 kilometers with an absolute magnitude of 16.02.[3]
Naming
This minor planet was named after Margaret Capitola Sonntag Comba (born 1940), a psychologist and art therapist by profession, faculty member at Prescott College, and wife of the discoverer.[7] The approved naming citation was published by the Minor Planet Center on 4 May 2004 (M.P.C. 51981).[8]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 49777 Cappi (1999 XS)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2049777.
- ↑ 2.0 2.1 Schmadel, Lutz D. (2006). "(49777) Cappi [2.36, 0.07, 4.5]". Dictionary of Minor Planet Names – (49777) Cappi, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 215. doi:10.1007/978-3-540-34361-5_2544. ISBN 978-3-540-34360-8.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (49777) Cappi". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=49777%7CCappi.
- ↑ 4.0 4.1 "Asteroid 49777 Cappi – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=49777.
- ↑ 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 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. 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 28 April 2016.
- ↑ 7.0 7.1 7.2 "49777 Cappi (1999 XS)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=49777.
- ↑ "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 (45001)-(50000) – Minor Planet Center
- 49777 Cappi at AstDyS-2, Asteroids—Dynamic Site
- 49777 Cappi at the JPL Small-Body Database
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