Uranus' rotational period

Details Uranus' rotational period Uranus' rotational period

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32..402t&link_type=abstract

Icarus, vol. 32, Dec. 1977, p. 402-412.

Astronomy and Astrophysics

Astronomy

10

Astronomical Spectroscopy, Planetary Rotation, Planetology, Spin Dynamics, Uranus (Planet), Astronomical Models, Natural Satellites, Planetary Radiation, Wavelengths

Scientific paper

A modified spectroscopic technique was applied to determine the rotational period of Uranus and the orientation of the projected spin axis of the planet. The method consists in obtaining a series of spectra for both a nonrotated planet disk and for a disk rotated 180 degrees. Ignoring the effects of seeing in analyzing the spectra for no rotation of the disk leads to a lower limit on the period, and for a disk rotated 180 degrees, ignoring the seeing in the modeling of the spectra leads to an upper limit on the period. When blurring from seeing and guiding errors are added to the modeling for both image orientations and the model spectra are compared to the observations, both the period and the degree of blurring are obtained simultaneously. The results gave a period of rotation of Uranus 23 + 5 or - 2 hr.

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