Quantization on brightness about meteors in Chinese ancient recordings

Details Quantization on brightness about meteors in Chinese ancient recordings Quantization on brightness about meteors in Chinese ancient recordings

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003acasn..44..416w&link_type=abstract

Acta Astronomica Sinica, vol. 44, no. 4, p. 416-430

Astronomy and Astrophysics

Astronomy

Solar System: Meteors, Chinese Ancient Recordings

Scientific paper

The records of ``big as X'' about meteors in Chinese annals were the values that the ancients estimated the scale of visible surface of the stars' images. In fact, the visible surface is a special sensation that derives from the diffraction, diffusion of light and effect of irradiation when we observe stars with naked eyes. In substance, ``big as X'' might be regarded as the records of brightness. These records can be quantified to apparent scales (angular diameter) according to the Model of Celestial Sphere used by Chinese ancients. Then we can reduce the size to a brightness on the basis of some ``standard points''. This paper has counted up 131 objects, which appeared in ancient 4420 recordings in the words ``big as X'', and reduced them to brightness.

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