Circular No. 5853

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)

1993 OL

Selected recent precise positions:

1993 UT α_{2000} δ_{2000} I Observer
Aug. 19.02981 16^{h}48^{m}37.^{s}84 − 2^{o}30′50′′.1  McCrosky
19.03131 16 48 37.21 − 2 30 42.3  _{”}
22.02421 16 28 55.65 + 1 04 12.3  _{”}
22.02712 16 28 54.52 + 1 04 24.6  _{”}
24.03634 16 16 32.32 + 3 20 51.4 15.9 deYoung
24.04314 16 16 29.89 + 3 21 18.7 16.0  _{”}
31.01684 15 38 12.12 +10 17 18.2 16.6  _{”}
31.02094 15 38 10.88 +10 17 30.9 16.9  _{”}

R. E. McCrosky and C.-Y. Shao (Oak Ridge). 1.5-m reflector + CCD. J. DeYoung (U.S. Naval Observatory, Washington). 0.61-m reflector +

CCD.

Improved orbital elements from the above observations and those on MPC 22445-22468:

T = 1993 Oct. 14.6275 TT  ω = 126.^{o}6392
e = 0.762516  Ω = 302.6604 }2000.0
q = 0.423822 AU  i = 37.8955
a = 1.784632 AU n^{o} = 0.4134101 P = 2.384 years
1993 TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
Aug. 21 16^{h}35.^{m}50 − 0^{o}07.^{′}7 0.350 1.118 98.^{o}5 63.^{o}5 15.7
26 16 05.09 + 5 27.4 0.370 1.049 85.5  73.9 16.0
31 15 38.30 +10 16.5 0.397 0.978 74.0  83.0 16.3
Sept. 5 15 14.09 +14 20.1 0.428 0.905 63.8  91.1 16.7
10 14 51.28 +17 41.1 0.462 0.830 54.6  98.3 17.0
15 14 28.78 +20 20.4 0.499 0.754 46.5 104.9 17.3
20 14 05.73 +22 13.3 0.539 0.679 39.3 110.5 17.5
25 13 41.74 +23 08.7 0.585 0.605 33.2 114.9 17.7

SUPERNOVA 1993X IN NGC 2276 M. Tombelli, A. Boattini and S. Bartolini, Montelupo, near Florence,

provide the following precise position, obtained with a 0.20-m reflector + CCD: α = 7^{h}10^{m}46^{s}.8, δ = +85^{o}52′05′′.9 (equinox 1950.0).

1993 September 4 Brian G. Marsden