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IAUC 5727: V346 Nor; 1992y

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                                                  Circular No. 5727
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)


V346 NORMAE
     S. Molinari, R. Liseau and D. Lorenzetti, Istituto di Fisica dello
Spazio Interplanetario, Frascati; and J. Graham, Carnegie Institution,
Washington, report: "We systematically observed this FU-Ori object
(the exciting source for HH 57; cf. IAUC 3785, 3792, 3823) in the near-
infrared during 1989-1992 with the European Southern Observatory's 1-m
telescope.  From the literature, it appears that the object is
steadily brightening, especially in the L and M bands, where it has
undergone an increase of more than 1.5 mag, along with a smaller fading
in J.  The last observation at ESO in Sept. 1992 gave J = 10.71 +/- 0.03,
H = 8.84 +/- 0.01, K = 7.15 +/- 0.01, L (3.8 microns) = 4.73 +/- 0.02,
M (4.6 microns) = 3.96 +/- 0.05.  A spectrum of the star taken with the
Las Campanas 2.5-m telescope in June 1992 showed no significant changes
from previous years, and we tentatively interpret the infrared brightening
to evolution of the circumstellar dust.  Further observations (especially
spectroscopic) are strongly encouraged during the present season."


COMET SHOEMAKER (1992y)
     Ephemeris continuation from the orbital elements on MPC 21533:

1993 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Apr.  3     2 38.50    +60 31.5    2.667    2.316   59.0   21.7     17.3
      8     2 49.77    +61 52.7    2.691    2.319   57.9   21.4     17.3
     13     3 02.42    +63 14.9    2.713    2.323   56.9   21.2     17.3
     18     3 16.67    +64 37.4    2.733    2.329   56.2   21.0     17.4
     23     3 32.75    +65 59.2    2.752    2.336   55.6   20.8     17.4
     28     3 50.93    +67 19.0    2.769    2.344   55.2   20.6     17.4
May   3     4 11.51    +68 35.3    2.785    2.354   54.9   20.5     17.4
      8     4 34.79    +69 46.1    2.801    2.365   54.7   20.4     17.5
     13     5 01.0     +70 49.0    2.816    2.377   54.6   20.3     17.5
     18     5 30.3     +71 41.4    2.830    2.391   54.6   20.2     17.5
     23     6 02.5     +72 20.4    2.845    2.406   54.6   20.1     17.6
     28     6 37.1     +72 43.2    2.861    2.421   54.7   20.0     17.6
June  2     7 13.1     +72 47.6    2.877    2.438   54.9   19.9     17.7
      7     7 49.4     +72 32.4    2.894    2.457   55.0   19.8     17.7
     12     8 24.6     +71 57.5    2.913    2.476   55.1   19.7     17.8
     17     8 57.9     +71 04.4    2.933    2.496   55.2   19.5     17.8
     22     9 28.48    +69 55.1    2.954    2.517   55.2   19.4     17.9


1993 March 27                  (5727)              Brian G. Marsden

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