Circular No. 5607

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.

Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505

MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)

SUPERNOVA 1992ax IN ANONYMOUS GALAXY J. Mueller reports her discovery of a probable supernova in an anony-

mous galaxy at α = 22^{h}08^{m}24^{s}.01, δ = +44^{o}47′04′′.2 (equinox 1950.0). The object is 19′′.5 south of the galaxy’s nucleus and had a blue magnitude of ∼ 18.5 on a plate taken on Sept. 3 by C. Brewer and Mueller with the 1.2-m Oschin Telescope in the course of the second Palomar Sky Survey. A spectrum obtained Sept. 5 by S. M. Hughes, J. R. Mould and M. Rich with the double spectrograph on the 5-m Hale telescope shows broad absorption at 640 nm, indicating that the object is probably a type I supernova.

1992 NA

Continuation to the ephemeris on IAUC 5582:

1992TT α_{2000} δ_{2000} Δ r ϵ β V
Sept. 5 2^{h}45.^{m}22 + 9^{o}49.^{′}6 0.087 1.055 120.^{o}7 55.^{o}2 13.3
10 3 18.35 +23 41.7 0.097 1.050 114.1 61.0 13.7
15 3 47.14 +33 58.9 0.112 1.049 109.8 64.5 14.1
20 4 11.35 +41 10.8 0.130 1.051 107.7 65.6 14.5
25 4 31.01 +46 12.6 0.150 1.057 107.3 64.9 14.8
30 4 46.37 +49 47.4 0.171 1.067 108.1 63.1 15.0
Oct. 5 4 57.72 +52 23.7 0.192 1.080 109.8 60.6 15.2
10 5 05.36 +54 19.3 0.212 1.097 112.3 57.4 15.4
15 5 09.50 +55 44.7 0.233 1.116 115.2 53.9 15.5
20 5 10.29 +56 45.9 0.253 1.138 118.6 50.2 15.7
25 5 07.94 +57 25.8 0.273 1.163 122.3 46.2 15.8
30 5 02.86 +57 44.8 0.293 1.190 126.3 42.2 15.9
Nov. 4 4 55.69 +57 43.1 0.314 1.219 130.5 38.2 15.9
9 4 47.15 +57 21.0 0.336 1.250 134.7 34.3 16.0
14 4 38.02 +56 39.5 0.360 1.282 138.8 30.6 16.1
19 4 28.99 +55 40.2 0.385 1.315 142.6 27.1 16.2
24 4 20.69 +54 25.7 0.414 1.350 145.9 24.2 16.4
29 4 13.62 +52 59.6 0.445 1.385 148.5 21.9 16.5
Dec. 4 4 08.06 +51 25.9 0.479 1.421 150.1 20.3 16.7
9 4 04.11 +49 48.6 0.518 1.458 150.5 19.4 16.9
14 4 01.73 +48 11.2 0.559 1.495 149.9 19.3 17.1
19 4 00.80 +46 36.2 0.605 1.532 148.3 19.7 17.3
24 4 01.19 +45 05.5 0.655 1.570 145.9 20.6 17.6

1992 September 5 Brian G. Marsden