9564 Jeffwynn

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 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 65.33 yr (23,862 days)
Aphelion 3.0829 AU
Perihelion 1.5967 AU
2.3398 AU
Eccentricity 0.3176
3.58 yr (1,307 days)
104.50°
0° 16m 31.44s / day
Inclination 22.307°
187.11°
121.63°
Earth MOID 0.6802 AU
Physical characteristics
Dimensions 4.71 km (calculated)[3]
3.035±0.001 h[4]
0.20 (assumed)[3]
S [3][5]
13.00[5] · 14.0[1][3] · 14.52±0.76[6]

    9564 Jeffwynn, provisional designation 1987 SG3, is a stony and eccentric asteroid, classified as a Mars-crosser, that measures approximately 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.[7]

    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 has an eccentricity of 0.32 and an inclination of 22° with respect to the ecliptic.[1] The first precovery was taken at Palomar Observatory in 1951, extending the asteroid's observation arc by 36 years prior to its discovery.[7]

    In September 2012, a rotational light-curve was obtained from photometric observations by U.S. astronomer Brian D. Warner at his Palmer Divide Observatory, Colorado. It gave a well-defined rotation period of 3.035±0.001 hours with a brightness variation of 0.16 in magnitude (U=3).[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 for stony asteroids of 0.20.[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 examined the Saudi Arabian Wabar craters on several expeditions in 1994 and 1995, together with Eugene Shoemaker, after whom the minor planet 2074 Shoemaker is named. Wynn's research included mapping the seafloor, analyzing terrestrial minerals, and studying aquifers and archaeological sites. He also observed with the comet-discovering Shoemaker-Levy team.[2] Naming citation was published on 23 November 1999 (M.P.C. 36948).[8]

    References

    1. 1 2 3 4 5 "JPL Small-Body Database Browser: 9564 Jeffwynn (1987 SG3)" (2016-11-08 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
    2. 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 29 July 2016.
    3. 1 2 3 4 5 6 "LCDB Data for (9564) Jeffwynn". Asteroid Lightcurve Database (LCDB). Retrieved 29 July 2016.
    4. 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 1 January 2016.
    5. 1 2 Carry, B.; Solano, E.; Eggl, S.; DeMeo, F. E. (April 2016). "Spectral properties of near-Earth and Mars-crossing asteroids using Sloan photometry". Icarus. 268: 340–354. arXiv:1601.02087Freely accessible. Bibcode:2016Icar..268..340C. doi:10.1016/j.icarus.2015.12.047. Retrieved 29 July 2016.
    6. ↑ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 29 July 2016.
    7. 1 2 "9564 Jeffwynn (1987 SG3)". Minor Planet Center. Retrieved 29 July 2016.
    8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 29 July 2016.

    External links

    This article is issued from Wikipedia - version of the 12/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.