Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 3401: 1979 QA; 1979 QB

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 3400 SEARCH Read IAUC 3402
IAUC number 

                                                  Circular No. 3401
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


1979 QA
     Eleanor Helin, California Institute of Technology, reports the
discovery of a fast-moving asteroidal object on exposures with the
1.2-m Schmidt telescope at Palomar.  The following positions of the
beginning of the first trail and beginning and end of the second
have been measured by S. J. Bus.

     1979 UT             R. A. (1950) Decl.       Mag.
     Aug. 22.32917    21 36 21.70   -15 33 35.3  18.5-19
          23.29861    21 30 05.21   -15 16 57.1
          23.34028    21 29 50.65   -15 16 19.6

     Computations by the undersigned suggest that this was an
Apollo-type object, its apparent motion decelerating but its magnitude
rapidly increasing as it moves away from the earth.  Observations
on other plates taken during Aug. 18-28 would be very useful.


1979 QB
     On the same plates Helin reports another object, in direct
motion at opposition, trail ends measured by Bus as follows:

     1979 UT             R. A. (1950) Decl.       Mag.
     Aug. 22.32917    21 49 44.95   -16 54 24.2    17
          22.38125    21 49 44.72   -16 53 52.0
          23.29861    21 49 48.42   -16 44 17.9
          23.34028    21 49 48.27   -16 43 51.6

     This is probably an Amor-type object, and the following tentative
ephemeris is from an orbit calculated by the undersigned on
the assumption that q = 1.14 AU, a = 2.00 AU (the other elements
being T = 1979 Oct. 11, Peri. = 31o, Node = 341o, i = 3o):

     1979 ET     R. A. (1950) Decl.     Delta     r     Mag.
     Aug. 25    21 49.94    -16 24.8
     Sept. 4    21 52.01    -14 00.6    0.202   1.205   16.7
          14    21 58.28    -10 31.6
          24    22 10.96    - 5 56.3    0.168   1.154   16.5
     Oct.  4    22 31.45    - 0 28.0

      Mag. = 19.5 + 5 log Delta + 5 log r + 0.023 (phase angle)


1979 September 10              (3401)              Brian G. Marsden

Read IAUC 3400 SEARCH Read IAUC 3402

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

Valid HTML 4.01!