Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 5295: 1991r; 1991l

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 5294 SEARCH Read IAUC 5296
IAUC number 

                                                  Circular No. 5295
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


COMET HELIN-ALU (1991r)
     E. Helin reports the following additional positions (cf. IAUC
5292) from 0.46-m Schmidt films obtained at Palomar:

     1991 UT             R.A. (1950) Decl.        m1
     June 13.34722   16 35 53.76   -22 25 43.3
          14.35590   16 35 22.51   -22 18 14.9
          16.24878   16 34 24.54   -22 04 07.3    16
          16.31753   16 34 22.38   -22 03 38.4
          16.34583   16 34 21.44   -22 03 23.8
          16.36701   16 34 20.73   -22 03 12.5
          18.26736   16 33 23.65   -21 49 08.4
          18.29896   16 33 22.63   -21 48 55.3

     The very preliminary parabolic orbital elements below are from
the available observations.  T and q are particularly uncertain,
but the ephemeris should be useful.

     T = 1991 Mar.  2.118 ET          Peri. = 348.796
                                      Node  = 252.742   1950.0
     q = 5.58729 AU                   Incl. =  57.060

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     June 13    16 36.08    -22 28.3    4.635    5.637    15.8
          18    16 33.53    -21 51.1
          23    16 31.13    -21 14.4    4.687    5.647    15.9
          28    16 28.91    -20 38.4
     July  3    16 26.91    -20 03.4    4.769    5.658    15.9
           8    16 25.14    -19 29.6
          13    16 23.64    -18 57.0    4.877    5.670    16.0
          18    16 22.41    -18 26.0
          23    16 21.47    -17 56.5    5.008    5.683    16.0


COMET HELIN-LAWRENCE (1991l)
     Total visual magnitude estimates (cf. IAUC 5247):  May 11.29 UT,
13.5 (A. Hale, Las Cruces, NM, 0.41-m reflector); 19.34, 13.6 (Hale);
June 2.23, 13.7 (C. S. Morris, Lockwood Valley, CA, 0.51-m
reflector); 4.24, 13.0 (Hale); 8.26, 13.8 (Morris).


1991 June 19                   (5295)             Daniel W. E. Green

Read IAUC 5294 SEARCH Read IAUC 5296

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!