Central Bureau for Astronomical Telegrams
IAUC 3453: 1980 AA; 1979l
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Read IAUC 3454
Circular No. 3453
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-864-5758
1980 AA
Extension of the ephemeris on IAUC 3447:
1980 ET R. A. (1950) Decl. Delta r B
Feb. 21 9 38.18 - 2 02.9
Mar. 2 9 50.69 - 3 10.9 0.213 1.195 17.5
12 10 01.26 - 3 23.2
22 10 11.66 - 3 13.0 0.335 1.301 18.8
Apr. 1 10 22.83 - 3 00.6
11 10 34.91 - 2 56.0 0.499 1.419 20.0
21 10 47.93 - 3 03.6
May 1 11 01.81 - 3 24.8 0.706 1.540 21.0
COMET BRADFIELD (1979l)
Ephemeris continuation from the elements on MPC 5176:
1980 ET R. A. (1950) Decl. Delta r m1
Feb. 26 3 41.16 +21 02.5
Mar. 2 3 44.88 +22 29.7 1.382 1.522 10.0
7 3 48.63 +23 39.5
12 3 52.45 +24 37.5 1.730 1.677 10.9
17 3 56.36 +25 27.1
22 4 00.35 +26 10.6 2.063 1.827 11.7
27 4 04.42 +26 49.5
Apr. 1 4 08.56 +27 24.8 2.378 1.974 12.3
6 4 12.75 +27 57.3
11 4 16.99 +28 27.5 2.672 2.118 12.9
16 4 21.27 +28 56.0
21 4 25.58 +29 22.9 2.943 2.258 13.4
26 4 29.90 +29 48.5
May 1 4 34.23 +30 13.2 3.190 2.395 13.8
A. C. Danks and W. Wamsteker, European Southern Observatory.
provide the following infrared magnitudes, obtained with the INSB
photometer on the 1-m telescope. The measurements were centered on
the visible nucleus in a 12" diaphragm with a 13" chop. An
integration time of 5 s was used, and the telescope tracking rate was
adjusted to maintain the comet in the diaphragm. Jan. 27.131 UT,
H = 11.53 +/- 0.06; 27.135, K = 10.94 +/- 0.10; 27.154, L = 7.34 +/- 0.25.
1980 February 15 (3453) Brian G. Marsden
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