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

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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 - 1987
Externally publishedYes

Fingerprint

Uranus (planet)
Uranus
Neptune (planet)
Neptune
brightness temperature
Callisto
Ganymede
infrared telescopes
night
filter
filters
high resolution

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

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

Infrared radiometry of Uranus and Neptune at 21 and 32 μm. / Orton, Glenn S.; Baines, Kevin H.; Bergstralh, Jay T.; Brown, Robert H.; Caldwell, John; Tokunaga, Alan T.

In: Icarus, Vol. 69, No. 2, 1987, p. 230-238.

Research output: Contribution to journalArticle

Orton, GS, Baines, KH, Bergstralh, JT, Brown, RH, Caldwell, J & Tokunaga, AT 1987, 'Infrared radiometry of Uranus and Neptune at 21 and 32 μm', Icarus, vol. 69, no. 2, pp. 230-238. https://doi.org/10.1016/0019-1035(87)90102-3
Orton GS, Baines KH, Bergstralh JT, Brown RH, Caldwell J, Tokunaga AT. Infrared radiometry of Uranus and Neptune at 21 and 32 μm. Icarus. 1987;69(2):230-238. https://doi.org/10.1016/0019-1035(87)90102-3
Orton, Glenn S. ; Baines, Kevin H. ; Bergstralh, Jay T. ; Brown, Robert H. ; Caldwell, John ; Tokunaga, Alan T. / Infrared radiometry of Uranus and Neptune at 21 and 32 μm. In: Icarus. 1987 ; Vol. 69, No. 2. pp. 230-238.
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