THE ASTRONOMER Electronic Circular No 755 1993 July 4 11.55UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074
TELEX: 9312111261 Answerback: TA G TELECOM GOLD: 10074:MIK2885
GMH at UK.AC.RUTHERFORD.STARLINK.ASTROPHYSICS STARLINK: RLSAC::GMH
GMH at UK.AC.CAM.ASTRONOMY.STARLINK STARLINK: CAVAD::GMH
-------------------------------------------------------------------
PERIODIC COMET HARTLEY 3 (1993m)
J. V. Scotti, University of Arizona, reports his recovery of this
comet with the Spacewatch telescope at Kitt Peak. On June 23, the
comet exhibited a coma of diameter 10" and a tail 0'.54 long in
p.a. 255 deg, and m2 = 22.1; the comet was close to a star of mag
14 on June 24 (measures slightly uncertain).
1993 UT R.A. (2000) Decl. m1
June 23.43707 1 40 51.19 +21 40 45.4
23.44496 1 40 51.79 +21 40 49.2 19.5
23.45118 1 40 52.21 +21 40 52.2 19.7
24.44795 1 42 02.95 +21 49 40.3
24.45394 1 42 03.37 +21 49 42.9
24.45990 1 42 03.89 +21 49 46.1
The comet's position is off slightly from the prediction on MPC
18257, such that Delta(T) about +0.49 day. The following orbital
elements by Daniel Green are from 27 observations, 1988-1993
(mean residual 0".7):
Epoch = 1994 May 8.0 TT
T = 1994 May 20.8684 TT Peri. = 168.4583
e = 0.316911 Node = 287.8791 2000.0
q = 2.461681 AU Incl. = 11.6954
a = 3.603750 AU n = 0.1440695 P = 6.841 years
IAUC 5826
PERIODIC COMET WHIPPLE (1993n)
J. V. Scotti, University of Arizona, reports his recovery of this
comet with the Spacewatch telescope at Kitt Peak. The comet
appears essentially stellar, and the following positions are very
close to the prediction on MPC 18259 (ephemeris on MPC 21961):
1993 UT R.A. (2000) Decl. m1
June 25.38638 19 51 43.55 - 8 25 59.9
25.39787 19 51 43.11 - 8 26 00.3 21.5
25.41126 19 51 42.63 - 8 25 59.9 21.0
26.34800 19 51 13.58 - 8 26 25.8 21.2
26.35657 19 51 13.28 - 8 26 25.9 20.7
26.36824 19 51 12.87 - 8 26 26.9
IAUC 5827
RY SAGITTARII
Additional estimates by D.Overbeek, South Africa which confirm a
fade is in progress (cf E749,E752):
1993 June 15.0, 6.5; 29.1, 7.6
1993 MF
Nick James, Chelmsford, UK reports the following astrometric
position for this recently-discovered fast-moving object (cf E751):
1993 June 28.95683 RA 20h33m07.42s DEC +09 23'27.0" (2000)
The position is the mean of two measurements and was based on
8 GSC stars.
Station: 51d44'40"N; 0d29'43"E, height 20m.