mystery object....1991VG

John locker (satcom@cybase.co.uk)
Sun, 5 Sep 1999 19:59:05 +0100

I was recently asked to put together an article about near space
asteroids,...a task which I didnt have much enthusiasm for , but am
ploughing my way through!
Anyway , during my research I came across the following , which
co-incidentally has recently appeared on another list.....
it refers to object ref 1991VG.
A comment is made that this may be a returning explorer craft,but if it
is, was , then it should have made a Cassini type near earth pass some
years  ago.

Having done some head scratching I cant for the life of me think which
probe this would have been ....anyone any ideas?


Best wishes,

john.
 

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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)
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MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


1991 VG
     J. V. Scotti, Lunar and Planetary Laboratory, reports his
discovery with the Spacewatch 0.91-m telescope of a fast-moving
asteroidal object:

     1991 UT             R.A. (1950) Decl.        V
     Nov.  6.32553    2 53 38.56   +13 29 58.9   20.7
           6.33633    2 53 36.87   +13 29 41.6
           6.35398    2 53 34.21   +13 29 10.9
           7.18437    2 53 51.41   +13 06 37.6   20.8
           7.19491    2 53 50.09   +13 06 21.8
           7.20631    2 53 48.71   +13 06 08.8
           7.33878    2 53 28.47   +13 02 39.6
           7.34932    2 53 26.83   +13 02 20.5
           7.36008    2 53 25.19   +13 02 00.5   21.2
           8.25231    2 53 33.82   +12 36 21.5
           8.26526    2 53 31.74   +12 35 59.3   20.3
           8.27777    2 53 29.59   +12 35 38.6
           8.29081    2 53 27.53   +12 35 16.1
           8.30357    2 53 25.37   +12 34 52.8   20.7
           8.31659    2 53 23.25   +12 34 29.3
           9.22124    2 53 29.91   +12 06 29.5   20.6
           9.26343    2 53 22.98   +12 05 13.6
           9.38013    2 53 03.50   +12 01 22.7
           9.38854    2 53 02.23   +12 01 03.7   20.8
           9.39727    2 53 00.94   +12 00 43.9
          11.24590    2 53 08.27   +10 57 24.0
          11.25073    2 53 07.44   +10 57 15.6   20.8
          11.32859    2 52 53.14   +10 54 23.5
          11.40787    2 52 40.05   +10 51 10.0   20.3

     The following orbital elements, by B. G. Marsden, are remarkably
similar to those of the earth.  The minimum geocentric distance
is 0.0031 AU on Dec. 5.4 UT (H = 28.8).  Geocentric solutions yield
e > 3.  The object might be a returning spacecraft.

                    Epoch = 1991 Oct. 31.0 ET
     T = 1992 Jan. 14.1186 ET         Peri. = 260.8887
     e = 0.065262                     Node  = 212.9200  1950.0
     q = 0.971470 AU                  Incl. =   0.3913
       a =  1.039297 AU    n = 0.9302397    P =   1.060 years


1991 November 13               (5387)             Daniel W. E. Green


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John locker