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IAUC 5867: 1993 RP; Poss. N IN Lup

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                                                  Circular No. 5867
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


1993 RP
     J. Luu, Stanford University; and D. Jewitt, University of Hawaii,
report their discovery of another very faint object with retrograde
opposition motion of about 3"/hr.  The object, which appears stellar
in 0".8 seeing, was detected in CCD images obtained with the
University of Hawaii's 2.2-m telescope on Mauna Kea.

     1993 UT             R.A. (2000) Decl.         R
     Sept.15.4963     0 49 01.88   + 5 13 37.6   24.5
          15.5850     0 49 01.42   + 5 13 34.8
          16.4558     0 48 57.17   + 5 13 07.0
          16.4976     0 48 56.97   + 5 13 05.8
          17.4630     0 48 52.23   + 5 12 35.1
          17.4964     0 48 52.06   + 5 12 33.8

     The circular direct orbit computed for this object by the
undersigned gives a distance intermediate between that of 1993 RO
(cf. IAUC 5865) and the earlier Jewitt-Luu discoveries but closer
to the former.  The distance would again change by several AU if
a much more eccentric or a retrograde solution were adopted.

 Epoch = 1993 Sept. 10.00 TT      Arg.lat.  = 180.57
                                      Node  = 192.15    2000.0
     a = 35.3745 AU                   Incl. =   2.79

1993 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      V
Sept.10     0 49.47    + 5 16.5   34.467   35.375  154.0    0.7     25.1
     20     0 48.66    + 5 11.2   34.408   35.375  163.9    0.5     25.0
     30     0 47.80    + 5 05.7   34.379   35.375  174.0    0.2     25.0
Oct. 10     0 46.92    + 5 00.0   34.378   35.375  175.9    0.1     25.0
     20     0 46.06    + 4 54.3   34.408   35.375  165.8    0.4     25.0


POSSIBLE NOVA IN LUPUS
     W. Liller, Vina del Mar, Chile, reports his discovery of a
possible nova of mag 8.0 (average of two photographs, Tech Pan film
+ orange filter) on Sept. 19.02 UT at R.A. = 14 28.4, Decl. =
-50 57 (equinox 1950.0).  His examination of some 50 films taken
during 1991 Jan.-1993 May 4 reveals no star brighter than mag 11.5
at this position.


1993 September 20              (5867)              Brian G. Marsden

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