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Infrared radiometry of Uranus and Neptune at 21 and 32 microns
- Source :
- Icarus. 69
- Publication Year :
- 1987
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1987.
-
Abstract
- Mauna Kea's NASA IRTF has been used to obtain 21- and 32-cm radiometric measurements of Uranus and Neptune; brightness temperatures of 54.1 + or - 0.3 K for Uranus and 58.1 + or 0.3 K for Neptune were obtained by calibrating the 21-cm data against Alpha Boo. A calibration of the 32-cm data against Callisto and Ganymede yielded respective temperatures of 51.8 + or - 1.5 K and 55.6 + or - 1.2 K. The general decrease of brightness temperatures with wavelength from 20 to 30 microns is confirmed. The two planets are noted to appear as bodies sufficiently different to depart from the hypothesis of smooth planetary bulk property variation as a function of heliocentric distance.
- Subjects :
- Lunar And Planetary Exploration
Subjects
Details
- Language :
- English
- ISSN :
- 00191035
- Volume :
- 69
- Database :
- NASA Technical Reports
- Journal :
- Icarus
- Notes :
- NAS7-100, , NSG-7320, , NASW-3159
- Publication Type :
- Report
- Accession number :
- edsnas.19870049341
- Document Type :
- Report
- Full Text :
- https://doi.org/10.1016/0019-1035(87)90102-3