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IAUC 3879: 1983 TB; WATER MASER IN Ori

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IAUC number 

                                                  Circular No. 3879
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


1983 TB
     The following precise positions have been reported:

     1983 UT           R.A.    (1950.0)   Decl.     Observer

     Oct. 12.12153    17 50 47.78    +59 10 35.3    Skiff
          12.18472    17 52 10.98    +59 08 45.5      "
          14.12291    18 32 31.78    +57 53 26.0      "
          14.13681    18 32 47.92    +57 52 42.2      "
          16.12971    19 08 36.59    +55 58 10.5    Gibson

J. Gibson (Palomar Observatory).
B. Skiff (Lowell Observatory, Anderson Mesa Station).  Measurer:
   C. S. Shoemaker.  Mid-points of long, ill-defined trails.

     The following elements by C. M. Bardwell, Center for
Astrophysics, from the above observations are necessarily somewhat
uncertain. This appears to be an Apollo-type object with possibly
the smallest perihelion distance of any known minor planet.

           T = 1983 Aug. 31.90 ET
       Peri. = 324.59                e =   0.8944
       Node  = 261.83   1950.0       a =   1.3027 AU
       Incl. =  22.77                n =   0.66291
           q =   0.1376 AU           P =   1.49 years

     1983 ET     R.A. (1950.0) Decl.      p        r      Mag.

     Oct. 18    19 36.93    +53 49.8    0.422    1.140    16.3
          20    20 02.16    +51 21.8
          22    20 23.07    +48 51.2    0.463    1.199    16.5
          24    20 40.53    +46 23.5
          26    20 55.27    +44 02.1    0.513    1.256    16.7
          28    21 07.89    +41 48.9
          30    21 18.82    +39 44.7    0.570    1.311    16.9
     Nov.  1    21 28.42    +37 49.5
           3    21 36.95    +36 03.1    0.632    1.364    17.2


WATER MASER IN ORION
     Z. Abraham and J. W. Vilas Boas, Instituto de Pesquisas
Espaciais, Sao Paulo, report that the 8 km/s H2O maser source in Orion
has flared up again, reaching a flux density of ~ 2.7 MJy on Oct.
7, the same as at the maximum of the previous flare in 1980 Apr.
Observations in 1983 June gave a flux density of 0.6 MJy.


1983 October 19                (3879)            Daniel W. E. Green

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