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HD 132783


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On the peculiar spectrum of the optical remnant of supernova A.D. 1006
Three spectral records of the faint optical filaments in the remnant ofSN 1006 show a nearly pure Balmer emission-line spectrum; the usualforbidden lines of O I, O II, O III, N II, and S II are either very weakor absent. No explanation is offered for the peculiar spectrum, but itis noted that SNR 1006 is the second remnant (after Tycho's) known tohave such a spectrum. To explain the Balmer decrement in terms of case Brecombination requires the extinction to be AV = 3 + or - 1,of which only about 0.75 mag seems to be due to galactic foregroundobscuration. The radial velocity of the filaments is nearly constantover 5 arcmin and surprisingly low, approximately -40 km/s relative tothe LSR. The absence of further, similar filaments in a 3 x 3 deg fieldcentered on the radio remnant supports van den Bergh's (1976)identification of the filaments with the optical remnant of SN 1006.

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Observation and Astrometry data

Constellation:Centaurus
Right ascension:15h02m21.59s
Declination:-41°41'26.2"
Apparent magnitude:7.584
Distance:246.305 parsecs
Proper motion RA:-10.2
Proper motion Dec:-26.8
B-T magnitude:9.5
V-T magnitude:7.743

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 132783
TYCHO-2 2000TYC 7829-378-1
USNO-A2.0USNO-A2 0450-19178310
HIPHIP 73579

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