Circular No. 6219

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)

BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) Phone 617-495-7244/7440/7444 (for emergency use only)

COMET C/1995 Q2 (HARTLEY-DRINKWATER) Ephemeris from the orbital elements on IAUC 6218:

1995 TT α_{2000} δ_{2000} Δ r ϵ β m_{1}
Aug. 31 22^{h}07.^{m}01 −25^{o}13.^{′}7 0.937 1.923 162.^{o}3 9.^{o}2 13.2
Sept. 2 21 49.54 −26 04.4 0.955 1.928 158.0 11.3 13.3
4 21 32.66 −26 44.4 0.979 1.934 153.3 13.5 13.3
6 21 16.57 −27 14.3 1.007 1.939 148.5 15.8 13.4
8 21 01.42 −27 35.2 1.040 1.945 143.6 17.9 13.5
10 20 47.31 −27 48.2 1.077 1.951 138.9 19.8 13.6
12 20 34.26 −27 54.5 1.117 1.958 134.4 21.6 13.7
14 20 22.30 −27 55.5 1.160 1.965 130.0 23.1 13.8
16 20 11.38 −27 52.3 1.207 1.972 125.8 24.4 13.9
18 20 01.46 −27 45.7 1.255 1.979 121.8 25.6 14.0
20 19 52.49 −27 36.7 1.306 1.987 118.0 26.5 14.1

COMET P/1995 Q3 (SHOEMAKER-HOLT 2) J. V. Scotti, Lunar and Planetary Laboratory, reports his recovery of

comet P/1989 E2 (= 1988 XI = 1989j) with the 0.9-m Spacewatch telescope at Kitt Peak. The object is of stellar appearance. The indicated correction (ignoring perturbations) to the prediction by D. W. E. Green on MPC 22032 is ΔT = −1.2 day.

1995 UT  α_{2000}  δ_{2000}  m_{1}
Aug. 29.47936  3^{h}11^{m}25.^{s}94  −2^{o}48′09′′.7  21.1
29.48700  3 11 26.08  −2 48 11.4  21.6
31.42950  3 12 06.14  −2 54 01.1  21.0
31.45296  3 12 06.57  −2 54 05.5  20.7
31.47513  3 12 07.03  −2 54 09.9  20.8

The following improved orbital elements, by B. G. Marsden, satisfy 43 observations 1989–1995 with mean residual 0′′.82:

Epoch = 1996 Aug. 25.0 TT

T = 1996 Aug. 19.9898 TT  ω = 6.^{o}1204
e = 0.336737  Ω = 99.7178 }2000.0
q = 2.664253 AU  i = 17.6966
a = 4.016889 AU n^{o} = 0.1224248 P = 8.051 years

1995 September 1 Brian G. Marsden