Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.359m&link_type=abstract
In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 359-362 (SEE N87-26714
Astronomy and Astrophysics
Astronomy
Brightness Discrimination, Cosmic Dust, Forward Scattering, Halley'S Comet, Light Scattering, Astronomical Photometry, Brightness, Cometary Atmospheres, Scattering Coefficients, Visual Observation
Scientific paper
The light scattering function of Halley's comet is discussed. In 18 of the previous 25 apparitions between AD 66 and 1910 the scatter angle theta reached values less than or = 50 deg. At such small angles, the light scatter function of cometary dust particles of the order of wavelength size shows significant enhancement which should be reflected in increased brightness, increased spectroscopic continuum-to-emission ratio, and increased visible-to-infrared emission. Such increases are seen in 19th and 20th century comets. In P/Halley, there is evidence for excess brightness at small theta in three apparitions. In 1910 and 1222, the comet was visible in broad daylight at theta = 1 deg and theta = 42 deg, respectively. In 1066, the evidence is less good, the comet being reported as like Venus, or like the Moon, with considerable ambiguity as to whether the comet was large as or bright as the full Moon in original texts.
Marcus Joseph N.
Seargent David A. J.
No associations
LandOfFree
Dust forward scatter brightness enhancement in previous apparitions of Halley's Comet 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 Dust forward scatter brightness enhancement in previous apparitions of Halley's Comet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust forward scatter brightness enhancement in previous apparitions of Halley's Comet will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1123383