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Visible and infrared investigations of planet-crossing asteroids and outer solar system objects (Document No: 19930022415)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Tholen, David J. |
| Copyright Year | 1991 |
| Description | A major effort was directed toward 951 Gaspra in preparation for the Galileo encounter in October 1991. Most of the observational work involved photometry, for purposes of investigating the rotational state and phase function of the asteroid to help plan the encounter, and for purposes of navigating the spacecraft to the object. Work was also done with radiometric data obtained with the IRTF at NASA's request, for which simultaneous visible photometry was acquired with the University of Hawaii 2.24-m telescope. The results from the observations made during the 1990 opposition were published by Goldader et al. The main results reported include a rotational period of 7.04246 hours, an absolute visual magnitude of 11.8026, a slope parameter of 0.285, an early estimate of a high obliquity, an infrared spectrum indicating an olivine-rich composition, and 13 astrometric positions. |
| File Size | 294036 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930022415 |
| Archival Resource Key | ark:/13960/t2q57hg16 |
| Language | English |
| Publisher Date | 1991-12-31 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Radiometers Gaspra Asteroid Navigation Asteroids Gas Giant Planets Infrared Photometry Infrared Radiation Infrared Spectra Astrometry Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
