Bill asked for the ring diameter. It works out to about 1.3 lightyears in
diameter.
"Since the ring absolute diameter is (1.27+/- 0.07) X 10^18 cm and
its angular diameter is 1".66 +/- 0."03 (Jakobsen et al. 1991),
we estimate a distance to SN 1987A:d(1987A)=51.2 +/- 3.1 Kpc."
~ N. Panagia, R. Gilmozzi, F. Macchetto, H-M. Adorf and R. P.
Kirshner, "Properties of the SN 1987A Circumstellar Ring and the
Distance to the Large Magellanic Cloud," Astrophysical Journal,
380, Oct. 10, 1991, p. L26
glenn
see http://www.glenn.morton.btinternet.co.uk/dmd.htm
for lots of creation/evolution information
anthropology/geology/paleontology/theology\
personal stories of struggle
>-----Original Message-----
>From: asa-owner@lists.calvin.edu [mailto:asa-owner@lists.calvin.edu]On
>Behalf Of Bill Payne
>Sent: Sunday, January 21, 2001 4:04 PM
>To: asa@calvin.edu
>Subject: SN 1987A
>
>
>Recently there was some discussion about the super nova SN1987A. What is
>supposed to be the measured diameter of the shell around the super nova?
>
>Thanks!
>
>Bill
>
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