Circular No. 6233

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 P/1995 S1 (DE VICO) Further to the notes on IAUC 6232, the orbit based on 1846 observa-

tions (with e adjusted) gives T = 1846 Mar. 6.044 TT (epoch 1846 Mar. 5.0 TT), all elements being within 0.01 unit of the non-adjusted solution (the latter having mean residual 1′′.5). Ephemeris continuation:

1995TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
Sept. 30 9^{h}58.^{m}24 +10^{o}43.^{′}4 1.030 0.671 38.^{o}5 68.^{o}5 5.8
Oct. 2 10 10.31 +13 07.8 1.010 0.664 38.6 70.0 5.7
4 10 23.47 +15 32.8 0.993 0.660 38.7 71.2 5.7
6 10 37.76 +17 56.1 0.980 0.659 38.9 72.2 5.6
8 10 53.18 +20 15.0 0.970 0.660 39.1 72.8 5.6
10 11 09.69 +22 26.6 0.964 0.664 39.5 73.1 5.6
12 11 27.19 +24 28.2 0.962 0.670 40.0 72.9 5.7
14 11 45.53 +26 17.0 0.964 0.679 40.5 72.4 5.7
16 12 04.49 +27 50.9 0.971 0.690 41.0 71.5 5.8
18 12 23.81 +29 08.6 0.982 0.704 41.7 70.3 5.9
20 12 43.22 +30 09.4 0.997 0.719 42.3 68.8 6.1
22 13 02.44 +30 53.5 1.016 0.736 42.9 67.0 6.2
24 13 21.20 +31 21.8 1.039 0.755 43.5 65.2 6.4
26 13 39.31 +31 35.8 1.064 0.775 44.1 63.2 6.5
28 13 56.59 +31 37.4 1.093 0.797 44.6 61.1 6.7
30 14 12.94 +31 28.5 1.124 0.820 45.0 59.0 6.9

Total visual magnitude estimates: Sept. 20.51 UT, 6.2 (C. S. Morris, Whitaker Peak, CA, 20×80 binoculars); 21.164, 6.3 (R. Haver, Villa S. Giovanni, Italy, 15×80 binoculars); 21.47, 6.3 (A. Hale, Cloudcroft, NM, 10×50 binoculars).

NOVA CASSIOPEIAE 1995 R. W. Argyle, Royal Greenwich Observatory, reports an accurate op-

tical position for N Cas 1995, obtained from 10 observations with the Carlsberg Automatic Meridian Circle on La Palma by C. Fabricius and M. Vallejo: α = 1^{h}05^{m}05^{s}.353 ± 0^{s}.004, δ = +54^{o}00′40′′.13 ± 0′′.07 (equinox J2000.0, FK5 reference frame, and epoch 1995.69). The following V magnitudes (± 0.06 mag) were obtained: Sept. 5.14 UT, 9.13; 6.14, 9.10; 7.13, 9.08; 8.13, 9.08; 9.13 9.05; 10.13, 9.05; 11.12, 9.07; 12.12, 9.07; 13.12, 9.13.

1995 September 21 Daniel W. E. Green