Circular No. 5857

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)

COMET MUELLER (1993p)

Selected precise positions, parabolic orbital elements and ephemeris:

1993 UT α_{2000} δ_{2000} m_{1} Observer
Aug. 20.61100 1^{h}43^{m}03.^{s}08 +49^{o}58′27′′.9 14.4 Nakamura
20.61539 1 43 02.91 +49 58 28.5  _{”}
22.51638 1 41 42.40 +50 01 49.1  Kawasato
22.57373 1 41 39.83 +50 01 55.6  _{”}
24.29485 1 40 19.05 +50 04 20.7  Balam
24.30231 1 40 18.65 +50 04 21.2  _{”}
25.55069 1 39 15.43 +50 05 45.5 14.7 Nakamura
25.56042 1 39 14.93 +50 05 46.2  _{”}
28.91476 1 36 04.48 +50 07 49.4  Tombelli
28.93144 1 36 03.50 +50 07 50.6  _{”}
31.08195 1 33 45.50 +50 07 43.9  Jones
31.11311 1 33 43.37 +50 07 43.0  _{”}
Sept. 2.13373 1 31 21.87 +50 06 24.6  _{”}
2.14040 1 31 21.40 +50 06 24.1  _{”}

A. Nakamura (Kuma Kogen). 0.60-m f/6.0 Ritchey-Chrétien + CCD. N. Kawasato (Uenohara). 0.30-cm reflector + CCD. D. D. Balam, J. B. Tatum and G. C. L. Aikman (Dominion Astrophysical

Observatory, Victoria). 1.82-m Plaskett reflector + CCD. M. Tombelli, A. Boattini and S. Bartolini (Montelupo). D. H. P. Jones, I. P. Williams and D. Harper (La Palma). Jacobus Kapteyn

telescope + CCD.

T = 1994 Mar. 26.421 TT  ω = 261.^{o}056
Ω = 193.791 }2000.0
q = 0.96724 AU  i = 105.032
1993TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
Sept. 10 1^{h}20.^{m}35 +49^{o}48.^{′}2 2.439 3.054 118.^{o}7 16.^{o}8 13.3
15 1 11.81 +49 23.2 2.324 2.996 123.2 16.3 13.1
20 1 02.14 +48 44.9 2.214 2.938 127.7 15.7 12.9
25 0 51.45 +47 50.9 2.110 2.880 132.0 15.0 12.7
30 0 39.95 +46 38.6 2.014 2.821 136.0 14.3 12.5
Oct. 5 0 27.88 +45 05.9 1.925 2.762 139.4 13.6 12.3
10 0 15.56 +43 11.2 1.845 2.703 142.0 13.1 12.1

1993 September 4 Brian G. Marsden