Central Bureau for Astronomical Telegrams
IAUC 3015: HR 1099; OBJECT SEBOK; P/TEMPEL 1; 1976j; P/GUNN
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Read IAUC 3016
Circular No. 3015
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK Telex: 921428
Telephone: (617) 864-5758
HR 1099
P. A. Feldman and J. M. MacLeod, Herzberg Institute of
Astrophysics, report that a relatively intense radio flare was observed
from the noneclipsing RS CVn binary HR 1099 during Nov. 22-25 at
10.5 and 6.25 GHz with the 46-m telescope of the Algonquin Radio
Observatory. The initial rise of the outburst (at 10.5 GHz) took
place in less than 2 days, with the highest observed flux density
(135 +/- 10 mJy) occurring on Nov. 24.28 UT. The single measurement
of radio spectral index that could be made, on Nov. 25.1 UT during
the declining phase of the flare, was characteristic of nonthermal
decay. This outburst was therefore quite similar to the 1974 Aug.
11-14 radio event in UX Ari, another noneclipsing RS CVn binary
(Gibson et al. 1975, Astrophys. J. 200, L99).
OBJECT SEBOK
W. Sebok, California Institute of Technology, reports the
discovery of a moderately fast-moving asteroidal object on a single
exposure with the 122-cm Schmidt telescope at Palomar. The positions,
measured by S. J. Bus, of the ends of the trail (the end-time is
uncertain but the sense of motion is unambiguous) are as follows:
1976 UT R. A. (1950) Decl. mpg
Oct. 25.25556 2 31 29.70 + 5 33 18.8 14.5
25.384 2 31 42.05 + 5 38 48.5
PERIODIC COMET TEMPEL 1
The following ephemeris, by B. G. Marsden, is from Handb. Br.
Astron. Assoc. for 1977:
For dT = +1d
1977 ET R. A. (1950) Decl. Delta r dR.A. dDecl. m2
Jan. 17 8 42.45 +30 53.4 2.269 3.229 -0m95 + 1'5 20.4
27 8 32.06 +31 49.9 -0.96 + 1.1
Feb. 6 8 21.15 +32 34.5 2.189 3.130 -0.95 + 0.7 20.2
16 8 10.84 +33 03.5 -0.92 + 0.3
26 8 02.17 +33 16.1 2.224 3.028 -0.88 0.0 20.0
Mar. 8 7 55.93 +33 13.5 -0.83 - 0.2
18 7 52.55 +32 58.4 2.341 2.922 -0.79 - 0.3 20.0
28 7 52.15 +32 33.4 -0.74 - 0.2
Apr. 7 7 54.63 +32 00.5 2.500 2.814 -0.71 - 0.1 20.0
17 7 59.73 +31 21.1 -0.69 + 0.1
27 8 07.19 +30 35.7 2.664 2.702 -0.67 + 0.4 19.9
May 7 8 16.69 +29 44.6 -0.66 + 0.7
17 8 27.95 +28 47.3 2.809 2.588 -0.66 + 1.0 19.9
27 8 40.72 +27 43.4 -0.66 + 1.4
June 6 8 54.77 +26 32.6 2.921 2.472 -0.67 + 1.8 19.8
16 9 09.93 +25 14.1 -0.68 + 2.2
26 9 26.05 +23 47.4 2.991 2.354 -0.70 + 2.7 19.6
July 6 9 43.00 +22 12.4 -0.71 + 3.2
16 10 00.69 +20 28.4 3.019 2.236 -0.73 + 3.7 19.4
m2 = 13.5 + 5 log Delta + 10 log r
PERIODIC COMET KLEMOLA (1976j)
Further precise positions have been reported as follows:
1976 UT R. A. (1950) Decl. m1 Observer
Oct. 19.64531 23 15 52.06 - 6 33 01.2 Jekabsons
25.80546 23 20 25.84 - 6 58 53.1 15.4 Mrkos
25.82005 23 20 26.37 - 6 58 49.0 "
26.78116 23 21 13.35 - 7 01 49.3 15.5 "
26.79539 23 21 13.86 - 7 01 43.3 "
27.84569 23 22 06.17 - 7 04 42.1 15.7 "
27.86016 23 22 06.86 - 7 04 39.8 "
27.89803 23 22 08.28 - 7 04 44.9 16.3 Sutcliffe
P. Jekabsons (Perth Observatory, Bickley). 33-cm astrograph.
A. Mrkos (Klet Observatory)
R. H. Sutcliffe (Woolston Observatory). Measurer: R. L. Waterfield.
Diffuse, condensed, circular coma 40" in diameter; no tail.
PERIODIC COMET GUNN
The following precise positions have been reported:
1976 UT R. A. (1950) Decl. m2 Observer
July 26.53203 21 39 21.01 -29 48 52.3 15.2 Gilmore
26.55726 21 39 19.87 -29 49 03.7 "
Sept.18.44734 21 06 44.27 -31 23 27.4 15.6 "
18.48683 21 06 43.88 -31 23 19.5 "
Oct. 19.58472 21 14 10.99 -28 50 06.0 Jekabsons
A. C. Gilmore (Carter Observatory). 41-cm reflector. The July 26
observations were made with the 61-cm reflector at Mount John
University Observatory. Measurer: P. M. Kilmartin.
P. Jekabsons (Perth Observatory, Bickley). 33-cm astrograph.
1976 December 9 (3015) Brian G. Marsden
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