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- Path: sparky!uunet!gumby!wupost!wuvmd!c09630gk
- Organization: Washington University, St. Louis
- Message-ID: <93027.141903C09630GK@wuvmd.wustl.edu>
- Date: Wed, 27 Jan 93 14:19:08 CST
- From: Gary Kronk <C09630GK@WUVMD>
- To: NETNEWS@WUVMD
- Subject: Re: comets in 16th century
- Newsgroups: sci.astro
- References: <3403@ucl-cs.uucp>
- Lines: 70
-
- On January 26, 1993, O.MostynOwen@cs.ucl.ac.uk wrote:
-
- >Please can someone help me?
- Yes!
-
- >I need to find references to the major comet sightings in the year 1506.
- >Is there a compendium of such things, and if so what is it called.
- There have been a few. A two volume work written in 1783 and 1784 by
- Alexander Guy Pingre gives details on all comets up to 1784. It is
- written in French. Books by Vsekyvatskii in 1957 and myself in 1984
- did not include comets for which orbits were not computed. Yeomans
- wrote a nice historical work on comets two years ago, which included
- an appendix briefly detailing all comets up to 1699. This latter
- book, although using my 1984 book for some details, did accurately
- represent the Chinese observations of comets for which no orbits
- were available, but relied heavily on Pingre for accounts from
- medieval texts. The best work has not been published. I am
- finishing up work on the first three volumes of Cometography and
- hope to approach a publisher later this year. The first volume
- will include details of all comets up to 1799, the second would
- cover comets from 1800 to 1859, and the third 1860 to 1899. I
- have covered all medieval documents myself and have identified
- numerous errors in Pingre's work (and therefore Yeoman's). I
- should also note that most of the work is also completed on
- additional volumes covering comets from 1900 to the present.
-
- >Does anyone know of ANY comet sightings in the early 16th century.
- There were 52 comets seen during the entire 16th century. I have
- listed below very brief details of the lone comet of 1506, as well
- as one in 1502 and 1513.
-
- 1502
- The Chinese found this comet on November 28, 1502, in western
- Hydra. It was last seen on December 8.
-
- 1506
- This comet was actually well observed in China and Japan during
- the period of July 31.5 and August 14.5, 1506. It moved from
- the region around Ursa Minor and Draco, then through Ursa Major,
- then through the region between Gemini and Orion, and finally
- wound up in the region of Coma Berenices, Leo, and Virgo. The
- observations indicated the tail was becoming longer during this
- period and was 5 degrees long when last seen. Orbits were
- computed by Laugier (1846) and Hasegawa (1979), which indicated
- perihelion dates of September 4.2 and August 28.5, respectively.
- Using Hasegawa's orbit, it seems the comet was found at a solar
- elongation of 71 degrees and was last seen at an elongation of
- 26 degrees, so that its disappearance was probably due to its
- entrance into evening twilight. The comet passed closest to
- Earth on August 15 (0.1425 AU) and was moving rapidly southward.
-
- 1513
- Around the end of December 1513, a comet was observed in Europe
- around Cancer. It was last detected on February 21, 1514, in
- Virgo. The comet was apparently visible throughout the night
- at one time.
-
- >I have been asked by a historian to calculate the countries in which a comet
- >would be visible given that it was visible in Britain at a particular date.
- >His reference does not specify in which constellation the comet was seen in
- >1506, hence my question.
- Since I have yet to uncover a reference to the comet of 1506 in
- European texts, I would be very interested in what this
- historian found!
-
- >Thanking you,
- >Owen Mostyn-Owen +44 71 387 7050 ext 3673
-
- Sincerely,
- Gary W. Kronk
-