Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 5168: 1991a; P/SCHWASSMANN-WACHMANN 1

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 5167  SEARCH Read IAUC 5169
IAUC number


                                                  Circular No. 5168
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


PERIODIC COMET METCALF-BREWINGTON (1991a)
     Orbital elements by S. Nakano from MPC 17596:

                    Epoch = 1991 Jan. 24.0 ET
     T = 1991 Jan.  5.7531 ET         Peri. = 208.1401
     e = 0.593667                     Node  = 187.0616  1950.0
     q = 1.592142 AU                  Incl. =  13.0335
       a =  3.918315 AU    n = 0.1270735    P =   7.756 years

     Prediscovery images were found by M. Tanaka (Fukushima-ken,
Japan) on photographs taken Jan. 5.5 UT, showing the comet at mag
about 15, thereby suggesting that a significant outburst took place
within two days of Brewington's discovery.  The projected magnitude
is therefore highly uncertain.

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     Jan. 24     0 51.48    - 2 57.7    1.688    1.604     9.2
     Feb.  3     1 18.69    - 0 50.1
          13     1 46.01    + 1 19.5    1.850    1.642     9.5
          23     2 13.33    + 3 27.0
     Mar.  5     2 40.56    + 5 28.6    2.033    1.703     9.9
          15     3 07.60    + 7 21.4
          25     3 34.40    + 9 02.7    2.237    1.785    10.3
     Apr.  4     4 00.86    +10 30.6
          14     4 26.90    +11 44.2    2.457    1.883    10.7
          24     4 52.47    +12 42.6
     May   4     5 17.46    +13 25.8    2.686    1.992    11.1
          14     5 41.82    +13 54.1
          24     6 05.49    +14 08.2    2.913    2.109    11.6


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     A. Cochran, University of Texas, writes:  "We observed this
comet with a long-slit CCD spectrograph at McDonald Observatory on
1990 Dec. 12, 13, and 15 UT.  On Dec. 12, emissions due to the (3-0)
band of CO+ were barely detectable.  By Dec. 13, the CO+ spectrum
was well-developed, with many bands visible.  The emissions were
stronger still on Dec. 15.  The continuum flux was mostly unchanged
during this time.  These data yield a maximum rise time to increase
a factor of e of 1.2 days.  These results are now being prepared for
publication."


1991 January 18                (5168)             Daniel W. E. Green

Read IAUC 5167  SEARCH Read IAUC 5169


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


Valid HTML 4.01!