Central Bureau for Astronomical Telegrams
IAUC 4581: Var IN Oph; 1987b1; 1987p
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Circular No. 4581
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 617-495-7244/7440/7444
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
VARIABLE IN OPHIUCHUS
H. Kosai, Tokyo Astronomical Observatory, reports that M. Wakuda,
Ryuyo, Shizuoka, has discovered a variable object at R.A. = 17h08m.8,
Decl. = -29D34' (equinox 1950.0). Magnitude estimates (200-mm lens,
Tri-X film, green filter): Mar. 27, [11; Apr. 10.72 UT, 8.5; 13.74,
10.1; 14.72, 10.2. The object does not appear on the Lick Sky Atlas.
COMET McNAUGHT (1987b1)
Continuation to the ephemeris on IAUC 4539:
1988 ET R.A. (1950) Decl. Delta r m1
Apr. 9 2 07.63 +64 54.5 2.480 2.134 10.8
14 2 33.14 +64 33.7
19 2 56.33 +64 06.9 2.693 2.263 11.2
24 3 17.40 +63 36.3
29 3 36.58 +63 03.6 2.903 2.390 11.6
May 4 3 54.10 +62 30.0
9 4 10.19 +61 56.4 3.105 2.516 12.0
14 4 25.02 +61 23.5
19 4 38.78 +60 51.6 3.297 2.640 12.3
24 4 51.58 +60 21.2
29 5 03.53 +59 52.3 3.475 2.763 12.6
June 3 5 14.74 +59 25.0
8 5 25.29 +58 59.5 3.637 2.884 12.9
13 5 35.24 +58 35.8
18 5 44.65 +58 14.0 3.781 3.004 13.2
23 5 53.54 +57 54.1
28 6 01.97 +57 36.0 3.905 3.122 13.4
PERIODIC COMET BORRELLY (1987p)
Total visual magnitude estimates: Mar. 9.93 UT, 10.2 (M.
Amoretti, Sanremo, Italy, 0.35-m reflector); 12.04, 11.0 (J. E.
Bortle, Stormville, NY, 0.32-m reflector); 14.89, 10.5 (Amoretti);
17.88, 10.8 (Amoretti); 20.05, 11.0 (Bortle); Apr. 5.18, 12.1 (A.
Hale, Las Cruces, NM, 0.41-m reflector); 6.13, 12.5 (E. A. Jacobson,
Evansville, MN, 0.25-m reflector).
1988 April 15 (4581) Brian G. Marsden
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