Circular No. 5677

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)

1992 WD_{5}

E. F. Helin and K. Lawrence report their discovery of a fast-moving asteroidal object on films taken by themselves and R. Bambery with the 0.46-m Palomar Schmidt telescope; their November observations below were measured by P. Rose. Further observations (with V magnitude) were obtained in December by J. E. Rogers (Camarillo, CA) using a 0.25-m Schmidt-Cassegrain telescope (+ CCD).

1992 UT α_{2000} δ_{2000} Mag. Observer
Nov. 21.48524 6^{h}12^{m}27.^{s}09 +40^{o}27′07′′.4  16.5 Helin
21.51042 6 12 27.64 +40 27 33.9  _{”}
22.41615 6 12 58.42 +40 43 11.3  _{”}
24.42274 6 13 56.20 +41 17 58.7  _{”}
Dec. 15.16085 6 11 44.73 +47 05 33.0  15.1 Rogers
17.15186 6 10 25.21 +47 33 27.1  _{”}
17.16254 6 10 24.65 +47 33 36.2  _{”}
17.17298 6 10 24.20 +47 33 45.1  _{”}
17.23096 6 10 21.14 +47 34 34.6  _{”}

Orbital elements by G. V. Williams, Center for Astrophysics:

T = 1993 Feb. 13.463 TT  ω = 121.^{o}548
e = 0.30341  Ω = 10.459 }2000.0
q = 1.25144 AU  i = 6.896

a = 1.79652 AU n^{o} = 0.409312 P = 2.41 years

1992 /93 α_{2000}  δ_{2000}  Δ  r  ϵ  β  V
Dec. 14 6^{h}12.^{m}42 +46^{o}48.^{′}6 0.394 1.351 154.^{o}7 18.^{o}2 15.1
24 6 04.82 +48 54.0 0.366 1.323 154.5 18.7 14.9
Jan. 3 5 56.14 +49 56.7 0.349 1.299 150.5 21.9 14.8
13 5 51.00 +49 47.2 0.344 1.279 144.6 26.4 14.9
23 5 52.85 +48 31.9 0.347 1.265 138.3 31.2 15.0
Feb. 2 6 03.09 +46 24.1 0.357 1.255 132.6 35.3 15.2
12 6 20.75 +43 37.4 0.374 1.252 127.6 38.7 15.4
22 6 43.77 +40 20.5 0.398 1.254 123.4 41.2 15.6
Mar. 4 7 10.18 +36 40.3 0.429 1.261 119.9 43.0 15.8
14 7 38.17 +32 44.6 0.466 1.274 116.8 44.1 16.1
24 8 06.47 +28 40.5 0.512 1.293 114.0 44.8 16.3

1992 December 17 Daniel W. E. Green