9564 Jeffwynn
| Discovery [1] | |
|---|---|
| Discovered by |
C. S. Shoemaker E. M. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 26 September 1987 |
| Designations | |
| MPC designation | 9564 Jeffwynn |
Named after |
Jeffrey Wynn (geophysicist)[2] |
| 1987 SG3 · 1951 NQ | |
| Mars-crosser [1][3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.92 yr (23,348 days) |
| Aphelion | 3.0826 AU |
| Perihelion | 1.5970 AU |
| 2.3398 AU | |
| Eccentricity | 0.3174 |
| 3.58 yr (1,307 days) | |
| 299.26° | |
| Inclination | 22.306° |
| 187.10° | |
| 121.65° | |
| Earth MOID | 0.6801 AU |
| Physical characteristics | |
| Dimensions | 4.71 km (calculated)[3] |
| 3.035±0.001 h[4] | |
| 0.20 (assumed)[3] | |
| S [3] | |
| 14.0[1] | |
|
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9564 Jeffwynn, provisional designation 1987 SG3, is a stony and eccentric asteroid, classified as a Mars-crosser, that measures about 4.7 kilometers in diameter. It was discovered by American astronomer couple Carolyn and Eugene Shoemaker at the U.S. Palomar Observatory in California, on 26 September 1987.[5]
The S-type asteroid orbits the Sun at a distance of 1.6–3.1 AU once every 3 years and 7 months (1,307 days). Its orbit shows a high eccentricity of 0.32 and an inclination of 22 degrees from the plane of the ecliptic.[1] In 2012, a photometric light-curve analysis at the U.S. Palmer Divide Observatory in Colorado gave it a rotation period of 3.035±0.001 hours with a brightness amplitude of 0.16 in magnitude.[4] The Collaborative Asteroid Lightcurve Link calculates a diameter of 4.7 kilometers based on an absolute magnitude of 14.0 and an assumed albedo of 0.20, which is a typical value for stony asteroids.[3]
The minor planet was named in honor of American Jeffrey C. Wynn, research geophysicist with the United States Geological Survey, described as a humorous, curious, inventive, adventurous geophysicist, who has studied the Wabar craters of Saudi Arabia with Eugene Shoemaker, after whom the minor planet 2074 Shoemaker is named, mapped the seafloor, analyzed mineral resources on land, studied aquifers and archaeological sites – and observed with the Shoemaker-Levy team.[2]
References
- 1 2 3 4 5 "JPL Small-Body Database Browser: 9564 Jeffwynn (1987 SG3)" (2015-06-13 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (9564) Jeffwynn. Springer Berlin Heidelberg. p. 699. ISBN 978-3-540-00238-3. Retrieved January 2016.
- 1 2 3 4 5 "LCDB Data for (9564) Jeffwynn". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
- 1 2 Warner, Brian D. (January 2013). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2012 June - September". The Minor Planet Bulletin 40 (1): 26–29. Bibcode:2013MPBu...40...26W. ISSN 1052-8091. Retrieved January 2016.
- ↑ "9564 Jeffwynn (1987 SG3)". Minor Planet Center. Retrieved January 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 (5001)-(10000) – Minor Planet Center
- 9564 Jeffwynn at the JPL Small-Body Database
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