24827 Maryphil
| Discovery [1] | |
|---|---|
| Discovered by | T. B. Spahr |
| Discovery site | Catalina Station |
| Discovery date | 2 September 1995 |
| Designations | |
| MPC designation | 24827 Maryphil |
Named after |
Mary & Phil Spahr (discoverer's parents)[2] |
| 1995 RA | |
| main-belt · Phocaea [3] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 19.64 yr (7,172 days) |
| Aphelion | 2.8915 AU |
| Perihelion | 1.7985 AU |
| 2.3450 AU | |
| Eccentricity | 0.2330 |
| 3.59 yr (1,312 days) | |
| 226.98° | |
| Inclination | 22.947° |
| 303.04° | |
| 58.696° | |
| Physical characteristics | |
| Dimensions |
6.72±0.19 km[4] 5.95±0.40 km[5] 6.65 km (calculated)[3] |
| 11.653±0.005 h[6] | |
|
0.236±0.014[4] 0.315±0.028[5] 0.23 (assumed)[3] | |
| S [3] | |
|
13.1[1][3][4] 13.00[5] | |
|
| |
24827 Maryphil, provisional designation 1995 RA, is a stony asteroid from the inner regions of the asteroid belt, about 6.7 kilometers in diameter. It was discovered by American astronomer Timothy Spahr at the U.S. Catalina Station, Arizona, on 2 September 1995.[2]
The stony S-type asteroid is a member of the Phocaea family, a group of asteroids with similar orbital characteristics. It orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 7 months (1,312 days). Its orbit shows an eccentricity of 0.23 and an inclination of 23 degrees from the plane of the ecliptic.[1]
In 2006, a photometric light-curve analysis by American amateur astronomer Brian Warner at the U.S Palmer Divide Station, Colorado, rendered a rotation period of 11.653±0.005 hours with a brightness amplitude of 0.44 in magnitude (U=3-).[6] According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures 6.7 and 6.0 kilometers, with an albedo of 0.24 and 0.32, respectively.[4][5] The Collaborative Asteroid Lightcurve Link (CALL) agrees with Akari's observations, assumes an albedo of 0.23, and calculates a corresponding diameter of 6.7 kilometers for the asteroid.[3]
The minor planet was named by the discoverer Timothy Spahr in honor of his parents, Mary Clark (b. 1938) and Phil Spahr (b. 1938), who have been very supportive of the scientific career choice of their son.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 24827 Maryphil (1995 RA)" (2015-04-19 last obs.). Jet Propulsion Laboratory. Retrieved February 2016.
- 1 2 3 "24827 Maryphil (1995 RA)". Minor Planet Center. Retrieved February 2016.
- 1 2 3 4 5 6 "LCDB Data for (24827) Maryphil". Asteroid Lightcurve Database (LCDB). Retrieved February 2016.
- 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved February 2016.
- 1 2 3 4 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. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved February 2016.
- 1 2 Warner, Brian D. (June 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - September-December 2006". The Minor Planet Bulletin 34 (2): 32–37. Bibcode:2007MPBu...34...32W. ISSN 1052-8091. Retrieved February 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 (20001)-(25000) – Minor Planet Center
- 24827 Maryphil at the JPL Small-Body Database
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