Mathematics – Logic
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135l...7f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 1, June 1984, p. L7-L9. Sponsorship: Consejo Nacional de Investigacio
Mathematics
Logic
9
Halley'S Comet, Magnitude, Secular Variations, Astronomical Photometry, Comet Nuclei, Lunar Effects, Twilight Glow, Comets, Halley, Brightness, Observations, Magnitude, History, Comet Nuclei, Procedure, Data
Scientific paper
The author reports the detection of the aging of comet Halley, manifested by the secular decrease of its brightness as a function of time. This detection is possible thanks to the use of the rediscovery dates of the comet, obtained from chinese, japanese and korean records (Broughton, 1979). These dates can be converted into magnitudes, using an ephemeris of the comet. In this way all instrumental effects masking the aging of the comet, have been avoided. However, two effects have still to be taken into account: the "twilight effect" or Sun effect, and the "Moon effect". If both are considered an aging rate of 0.055 magnitudes/apparition is found. This value implies an upper lifetime of the nucleus of 39 revolutions, approximately.
No associations
LandOfFree
Aging of comet Halley detected 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 Aging of comet Halley detected, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aging of comet Halley detected will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1850711