Infrared radiometry of Uranus and Neptune at 21 and 32 μm

Glenn S. Orton, Kevin H. Baines, Jay T. Bergstralh, Robert H. Brown, John Caldwell, Alan T. Tokunaga

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Radiometric measurement of Uranus and Neptune near 21 and 32 μm have been made with filters with widths of 8 and 5 μm, respectively. The observations at 21 μm, made on 1985 June 19 at the NASA Infrared telescope facility at Mauna Kea, Hawaii, were calibrated against α Boo and corresponded to brightness temperatures of 54.1 ± 0.3 K for Uranus and 58.1 ± 0.3 K for Neptune. The observations at 32 μm were made on three nights: 1983 May 1 and 1984 May 30 and 31, also at the NASA IRTF. Calibrated against the Jovian satellites Callisto (J4) and Ganymede (J3), these measurements corresponded to brightness temperatures of 51.8 ± 1.5 K for Uranus and 55.6 ± 1.2 K for Neptune. The observations are consistent with higher-resolution studies and confirm the general decrease of brightness temperatures going from about 20 to 30 μm.

Original languageEnglish (US)
Pages (from-to)230-238
Number of pages9
JournalIcarus
Volume69
Issue number2
DOIs
StatePublished - Feb 1987

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Orton, G. S., Baines, K. H., Bergstralh, J. T., Brown, R. H., Caldwell, J., & Tokunaga, A. T. (1987). Infrared radiometry of Uranus and Neptune at 21 and 32 μm. Icarus, 69(2), 230-238. https://doi.org/10.1016/0019-1035(87)90102-3