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IAUC 5438: RNO 1B, SVS 13; 1991h1

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                                                  Circular No. 5438
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


RNO 1B, SVS 13
     D. Fiebig, Max-Planck-Institut fur Radioastronomie (MPIfR),
Bonn, and Institut fur Theoretische Astrophysik (ITA), Universitat
Heidelberg; and W. J. Duschl and W. M. Tscharnuter, ITA, report: "We
announce the detection of H2O maser emission at 22.235 GHz at the
position of the FU Ori objects RNO 1B (Cohen 1980, A.J. 85, 29) and
SVS 13 (Strom, Vrba, and Strom 1976, A.J. 81, 314) using the 100-m
telescope of MPIfR.  RNO 1B (R.A. = 0h33m52s.1, Decl. = +63 12'24",
equinox 1950.0) shows two components at heliocentric velocities (vh)
of -34 and -16 km/s.  SVS 13 (R.A. = 3h25m58s.1, Decl. = +31 05'33")
shows a blended line at vh about -17 km/s."


COMET MUELLER (1991h1)
     Improved parabolic orbital elements from MPC 19468:

     T = 1992 Mar. 21.2096 TT         Peri. = 307.0178
                                      Node  = 288.7876  2000.0
     q = 0.198641 AU                  Incl. =  95.5547

1992 TT    R. A. (2000) Decl.     Delta     r    Elong. Phase    m1
Jan. 29    4 30.18    +42 09.8    0.561   1.366  121.7   37.8   11.6
Feb.  3    3 42.47    +34 34.4    0.559   1.268  107.2   47.9   11.3
      8    3 05.99    +26 23.2    0.578   1.168   92.8   57.5   11.0
     13    2 38.44    +18 37.8    0.616   1.063   79.4   65.9   10.7
     18    2 17.04    +11 45.4    0.666   0.955   67.3   72.7   10.4
     23    1 59.43    + 5 48.7    0.723   0.841   56.3   78.0   10.0
     28    1 43.67    + 0 39.8    0.785   0.723   46.3   82.0    9.6
Mar.  4    1 27.94    - 3 50.6    0.849   0.597   36.9   84.7    8.9
      9    1 10.10    - 7 46.5    0.913   0.466   27.9   85.6    8.0

     Total magnitude and coma diameter estimates (visual unless
otherwise noted):  Jan. 6.935 UT, 14:, about 40" (H. Mikuz, Ljubljana,
Slovenia, 0.19-m camera + CCD); 16.20, 14.4:, about 1' (Mikuz, 0.36-
m reflector); 24.19, 11.1, about 5' (A. Hale, Las Cruces, NM, 0.41-m
reflector); 25.20, 11.3:, > 3' (C. S. Morris, Pine Mountain Club,
CA, 0.26-m reflector); 26.04, 12.4, 1'.7 (H. Dahle, Oslo, Norway,
0.20-m reflector); 26.16, 11.5:, 3'.7 (G. W. Kronk, Troy, IL, 0.33-m
reflector).


1992 January 27                (5438)             Daniel W. E. Green

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