Mathematics – Logic
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007icar..187...41l&link_type=abstract
Icarus, Volume 187, Issue 1, p. 41-55.
Mathematics
Logic
31
Scientific paper
The photometric properties of the nucleus of Comet 9P/Tempel 1 are studied from the disk-resolved color images obtained by Deep Impact (DI). Comet Tempel 1 has typical photometric properties for comets and dark asteroids. The disk-integrated spectrum of the nucleus of Tempel 1 between 309 and 950 nm is linear without any features at the spectral resolution of the filtered images. At V-band, the red slope of the nucleus is 12.5±1% per 100 nm at 63° phase angle, translating to B V=0.84±0.01, V R=0.50±0.01, and R I=0.49±0.02. No phase reddening is confirmed. The phase function of the nucleus of Tempel 1 is constructed from DI images and earlier ground-based observations found from the literature. The phase coefficient is determined to be β=0.046±0.007 mag/deg between 4° and 117° phase angle. Hapke's theoretical scattering model was used to model the photometric properties of this comet. Assuming a single Henyey Greenstein function for the single-particle phase function, the asymmetry factor of Tempel 1 was fitted to be g=-0.49±0.02, and the corresponding single-scattering albedo (SSA) was modeled to be 0.039±0.005 at 550 nm wavelength. The SSA spectrum shows a similar linear slope to that of the disk-integrated spectrum. The roughness parameter is found to be 16°±8°, and independent of wavelength. The Minnaert k parameter is modeled to be 0.680±0.014. The photometric variations on Tempel 1 are relatively small compared to other comets and asteroids, with a ˜20% full width at half maximum of albedo variation histogram, and ˜3% for color. Roughness variations are evident in one small area, with a roughness parameter about twice the average and appearing to correlate with the complex morphological texture seen in high-resolution images.
A'Hearn Michael F.
Belton Michael J. S.
Crockett Christopher J.
Farnham Tony L.
Li Jian-Yang
No associations
LandOfFree
Deep Impact photometry of Comet 9P/Tempel 1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Deep Impact photometry of Comet 9P/Tempel 1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Deep Impact photometry of Comet 9P/Tempel 1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-923251