|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
The Short Rotation Period of Nereid | | T. Grav
; M.J. Holman
; JJ. Kavelaars
; | | Date: |
30 May 2003 | | Journal: | Astrophys.J. 591 (2003) L71-L74 | | Subject: | astro-ph | | Affiliation: | 1,2), M.J. Holman , JJ. Kavelaars ( University in Oslo, Harvard-Smithsonian Center for Astrophysics, National Research Council Canada | | Abstract: | We determine the period, p = 11.52 pm 0.14 h, and a light curve peak-to-peak amplitude, a = 0.029 pm 0.003 magnitudes, of the Neptunian irregular satellite Nereid. If the light curve variation is due to albedo variations across the surface, rather than solely to the shape of Nereid variations, the rotation period would be a factor of two shorter. In either case, such a rotation period and light curve amplitude, together with Nereid’s orbital period, p=360.14 days, imply that Nereid is almost certainly in a regular rotation state, rather than the chaotic rotation state suggested by Schaefer and Schaefer (1988,2000) and Dobrovolskis (1995). Assuming that Nereid is perfectly spherical, the albedo variation is 3% across the observed surface. Assuming a uniform geometric albedo, the observed cross sectional area varies by 3%. We caution that the lightcurve found in this paper only sets limits on the combination of albedo and physical irregularity and that we cannot determine the orientation of Nereid’s spin axis from our data. | | Source: | arXiv, astro-ph/0306001 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER