THE ASTRONOMER Electronic Circular No 434 1990 July 28 22.00UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074
Telex: 94082518 Answerback: TAGUY Microlink: MAG60138
JANET:GMH @ UK.AC.CAM.ASTRONOMY.STARLINK or GUYH@UK.AC.SUSSEX.CLUSTER
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CORRECTION. The ecircular mailed on July 26 should be numbered 433 not 33.
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COMET LEVY (1990c)
Orbital elements from MPC 1668 (epoch 1990 Nov. 5.0 ET):
T = 1990 Oct. 24.6277 ET Peri. = 242.6328
e = 1.001267 Node = 138.6561 1950.0
q = 0.938779 AU Incl. = 131.5951
1990 ET R.A. (1950) Decl. Delta r m1
Aug. 7 23 00.44 +25 19.5 0.768 1.615 5.5
8 22 55.15 +24 45.4
9 22 49.48 +24 07.3 0.714 1.590 5.3
10 22 43.40 +23 24.7
11 22 36.88 +22 37.1 0.661 1.565 5.0
12 22 29.89 +21 43.8
13 22 22.41 +20 44.4 0.611 1.541 4.8
14 22 14.42 +19 38.0
15 22 05.87 +18 24.1 0.566 1.516 4.6
16 21 56.77 +17 02.0
17 21 47.10 +15 31.0 0.524 1.492 4.3
18 21 36.85 +13 50.8
19 21 26.03 +12 00.9 0.489 1.468 4.1
20 21 14.65 +10 01.2
21 21 02.72 + 7 52.2 0.461 1.444 3.9
22 20 50.32 + 5 34.2
23 20 37.49 + 3 08.6 0.441 1.420 3.7
24 20 24.30 + 0 36.9
25 20 10.85 - 1 58.9 0.430 1.396 3.6
26 19 57.23 - 4 36.6
27 19 43.55 - 7 13.6 0.430 1.373 3.5
28 19 29.90 - 9 47.6
29 19 16.42 -12 16.3 0.439 1.349 3.5
30 19 03.17 -14 38.1
31 18 50.27 -16 51.5 0.458 1.326 3.5
Sept. 1 18 37.77 -18 55.6
2 18 25.74 -20 49.9 0.484 1.304 3.6
3 18 14.20 -22 34.6
4 18 03.21 -24 09.7 0.517 1.281 3.6
5 17 52.77 -25 35.8
6 17 42.88 -26 53.5 0.555 1.259 3.7
IAUC 5060
SUPERNOVA 1990T IN ANONYMOUS GALAXY
M. Hamuy, Cerro Tololo Interamerican Observatory; and J. Maza,
Astronomy Department, University of Chile, report: "R. Antezana has
discovered a supernova 25" east and 2" south of the nucleus of an
anonymous galaxy. The supernova (estimated mpg = 16.5) was found on
a 15-min 103a-O plate taken by Hamuy and L. Wells with the Curtis
Schmidt telescope on July 21.105 UT. The galaxy is at R.A. =
19h54m58s.0, Decl. = -56 23'38" (equinox 1950.0). Confirmation was
made by T. Williams (Rutgers University), who obtained UBVRI CCD
images with the CTIO 0.9-m telescope on July 26. A spectrum (range
630-950 nm) obtained on the same night by M. Phillips with the CTIO
4-m telescope shows strong Si II 635-nm absorption, consistent with
a type-Ia supernova near maximum light. A redshift of 0.040 for the
parent galaxy was measured from the same spectrum."
PKS 2155-30, 3C 35, AND PG 1553+11
J. C. Noble, B. Mitch, M. T. Carini, and H. R. Miller, Georgia
State University, write: "We have obtained CCD observations of the
blazars PKS 2155-304, 3C 345, and PG 1553+11 at Lowell Observatory
with the 1.05-m telescope + RCA CCD Camera. PKS 2155-30 was found
to be in a bright state, with V = 12.74 +/- 0.04 on June 29 UT. PG
1553+11 was also found to be in a bright state, with V = 13.90 +/-
0.04 on Mar. and V = 13.83 +/- 0.04 on June 29. 3C 345 continues
to be near a minimum in brightness, with V = 17.28 +/- 0.05 observed
on June 29. Further observations of these sources are encouraged."
PERIODIC COMET PETERS-HARTLEY (1990d)
Total visual magnitude estimates (cf. IAUC 5026): June 15.51
UT, 13.2 (A. Pearce, Scarborough, W.A., 0.41-m reflector); 20.44,
13.0 (D. Seargent, The Entrance, N.S.W., 0.25-m reflector); 23.23,
11.3 (C. S. Morris, Pine Mountain Club, CA, 0.26-m reflector); 26.56,
13.0 (Pearce); July 13.20, 13.0 (A. Hale, Las Cruces, NM, 0.41-m
reflector); 15.2, 11.4 (Morris).
FG SERPENTIS = AS 296
IBVS 3476 equates AS 296 with FG Ser. Visual magnitude esti-
mates (cf. IAUC 4886) by Pearce: Mar. 23.87 UT, 10.3; Apr. 4.87,
10.6; 26.84, 10.6; May 1.86, 10.7; 20.85, 10.5; June 27.83, 10.6.
IAUC 5061
D.G.Buczynski