THE ASTRONOMER Electronic Circular No 376 1989 Dec 30 14.11UT
Microlink:MAG60138 JANET:GMH at UK.AC.RO-GREENWICH.STARLINK
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074
Telex: 94082518 Answerback: TAGUY
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PERIODIC COMET RUSSELL 4 (1989g1)
J. Gibson, OAO Corporation and Jet Propulsion Laboratory,
reports his recovery of this comet with the Palomar 1.5-m
reflector (+ CCD + Gunn r filter), as indicated below. The
object is stellar within the limits of seeing.
1989 UT R.A. (1950) Decl. m2
Dec. 11.35311 7 31 03.33 +26 20 51.1 19
11.36774 7 31 02.93 +26 20 55.2
11.38325 7 31 02.53 +26 20 59.0
11.40928 7 31 01.81 +26 21 05.7
12.36030 7 30 37.44 +26 25 12.4
12.36612 7 30 37.28 +26 25 13.7
12.38179 7 30 36.84 +26 25 17.8
12.39352 7 30 36.54 +26 25 21.1
The above observations indicate that the prediction on
MPC 12136 (ephemeris on MPC 15430) requires a correction by
Delta(T) = -0.6 day. Improved orbital elements by B. G.
Marsden, Center for Astrophysics, from 49 observations,
1984-1989 (mean residual 1".2):
Epoch = 1990 July 8.0 ET
T = 1990 July 6.8305 ET Peri. = 92.9874
e = 0.366319 Node = 70.3963 1950.0
q = 2.222186 AU Incl. = 6.1896
a = 3.506791 AU n = 0.1500857 P = 6.567 years
IAUC 4932
TA INDEX UPDATE
A revised copy of the index was transmitted earlier today. This
hopefully includes all amendments you advised after the first
edition. Please e-mail any further entries/changes as soon as
possible.
VARIABLE STAR RESULTS
Please note that Martin Mobberley will deputise for Tom Saville
for the 1990 February issue only in respect of the Variable
Star Column. Results should be sent to:
E-mail MAG60205
Postal: 'Denmara', Old Hall Lane, Cross Green, Cockfield,
Bury St Edmunds, Suffolk, IP30 0LQ
Guy M Hurst