A comparison of spot sizes on the asteroid 4 Vesta surface from ground-based and space observations
| 1Prokofieva-Mikhailovskaia, VV, 1Rublevsk, AN 1Crimean Astrophysical Observatory, Nauchny, Ukraine |
| Kinemat. fiz. nebesnyh tel (Online) 2013, 29(5):64-74 |
| Start Page: Dynamics and Physics of Solar System Bodies |
| Language: Russian |
Abstract: Crater sizes determined from photographs obtained by the Dawn spacecraft from its orbits around the asteroid 4 Vesta were compared with ones obtained with the use of ground-based spectrophotometric observations and spectral-frequency method (SFM). All the sizes of craters on Vesta were determined with the use of SFM for the processing of equivalent widths of hydrosilicate bands and color indices B – V and V – R. It turns out that the sizes of craters and spots located at the asteroid’s poles correspond to the sizes of spots if it is granted that they are located at 40—45° north and south latitudes. The comparison results for sizes from 10 to 100 km are given in the table. We concluded that SFM allows one to determine sizes of craters on surfaces of asteroids. |
| Keywords: 4 Vesta, asteroid, crater |
References:
1.A. N. Aksenov, Yu. A. Egorov, V. G. Teifel’, and G. A. Kharitonova, “The rotation period of the asteroid 4 Vesta,” Pis’ma Astron. Zh. 13(7), 616–620 (1987).
2.V. V. Busarev, V. V. Prokof’eva-Mikhailovskaya, and A. N. Rublevskii, “Development and application of the spectral-frequency method for the study of surfaces of atmosphereless bodies,” Izv. Krym. Astrofiz. Observ. 104(6), 95–102 (2009).
3.V. V. Busarev, V. V. Prokof’eva-Mikhailovskaya, A. N. Rublevskii, and N. N. Gor’kavyi, “Spots on Asteroid Surfaces: Research Opportunities Using Ground-Based Instruments,” Kinem. Phys. Celest. Bodies 28, 1–8 (2012).
https://doi.org/10.3103/S0884591312010059
4.V. V. Prokof’eva-Mikhailovskaya, V. V. Busarev, N. N. Gor’kavyi, and A. N. Rublevskii, “Reliability of Estimates for the Sizes of Spots on Asteroid Surfaces Made by the Spectral-Frequency Method,” Kinem. Phys. Celest. Bodies 27, 291–298 (2011).
https://doi.org/10.3103/S0884591311060055
5.V. V. Prokof’eva-Mikhailovskaya, V. V. Busarev, and A. N. Rublevskii, “From spectral observations of astronomical objects to the s20 spectral-frequency method,” Kinem. Fiz. Nebes. Tel., Prilozhenie, 434–438 (2009).
6.V. V. Prokof’eva-Mikhailovskaya, A. N. Rublevskii, and V. V. Bochkov, “The Sizes of Color Patches on the Surface of the Asteroid 4 Vesta,” Sol. Syst. Res. 42, 505–521 (2008).
https://doi.org/10.1134/S003809460806004X
7.V. V. Prokof’eva-Mikhailovskaya, A. N. Rublevskii, and V. V. Bochkov, “Water combinations on the surface of the asteroid 4 Vesta,” Bull. Crimean Astrophys. Obs. 104, 162–170 (2008).
https://doi.org/10.3103/S0190271708010221
8.S. J. Bus, F. Vilas, and M. A. Barucci, “Visible-wavelength spectroscopy of asteroids,” in Asteroid III, Ed. by W. F. Bottke, A. Cellin, P. Paolicchi, and R. Binzel (Univ. of Arizona press, Tucson, 2002), pp. 169–182.
9.J. D. Drummond, A. Eckart, and E. K. Hege, “Speckle interferometry of asteroids. IV. Reconstructed images of 4 Vesta,” Icarus 73, 1–14 (1988).
https://doi.org/10.1016/0019-1035(88)90082-6
10.O. L. Hansen, “Radii and albedos of 84 asteroids from visual and infrared photometry,” Astron. J. 81, 74–84 (1976).
https://doi.org/10.1086/111855
11.T. Gehrels, “Minor Planets. I. The Rotation of Vesta,” Astron. J. 72, 929–938 (1967).
https://doi.org/10.1086/110364
12.N. N. Gorkavyi, A. N. Rublevsky, and V. V. Prokofjeva-Mikhajlovskaya, “The sizes of impact craters and ejecta spots on asteroids,” in Protecting the Earth against Collisions with Asteroids and Comet Nuclei, Proceedings of the International Conference on Asteroid-Comet Hazard (St.-Petersburg, 2009), Ed. by A. M. Finkelstein, W. F. Huebner, and V. A. Shor (Nauka, St. Petersburg, 2010), pp. 62–64.
13.R. C. Taylor, S. Tapia, and E. F. Tedesko, “The Rotation period and pole orientation of asteroid 4 Vesta,” Icarus 62, 298–304 (1985).
https://doi.org/10.1016/0019-1035(85)90125-3
14.E. F. Tedesco, P. V. Noah, M. Noah, and S. D. Price, “A supplement IRAS minor planet survey,” Astron. J. 123, 1056–1085 (2002).
https://doi.org/10.1086/338320
15.P. G. Thomas, R. P. Binzel, M. J. Gaffey, et al., “Impact excavation on asteroid 4 Vesta: Hubble space telescope results,” Science 277, 1492–1495 (1997).
https://doi.org/10.1126/science.277.5331.1492
16.V. S. Tsvetkova, V. N. Dudinov, S. B. Novikov, et al., “Shape and size of asteroid 4 Vesta: speckle interferometry and polarimetry,” Icarus 92, 342–349 (1991).
https://doi.org/10.1016/0019-1035(91)90057-Z
17.F. Vilas, A. L. Cochran, and K. S. Jarvis, “Vesta and the Vestoids: a new rock group?,” Icarus 147, 119–128 (2000).
https://doi.org/10.1006/icar.2000.6445
18.S. P. Worden, M. K. Stein, G. D. Schmidt, and J. R. P. Angel, “Angular diameter of Vesta from specle-interfer-ometry,” Icarus 32, 450–457 (1977).
https://doi.org/10.1016/0019-1035(77)90016-1