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IAUC 6416: V1333 Aql; C/1996 B1

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                                                  Circular No. 6416
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


V1333 AQUILAE
     S. A. Ilovaisky and C. Chevalier, Observatoire de Haute-
Provence, communicate:  "Observations of V1333 Aql, the optical
counterpart of the recurrent x-ray transient Aquila X-1, have been
obtained this year at Haute-Provence with the 1.2-m telescope (+
TK1024 CCD camera) on Feb. 28; Mar. 19, 20, 28, and 29; Apr. 4 and
5; May 27, 28, 29, and 30; and June 1, 6, and 7.  The object
remained in quiescence (V = 19.2) until May 29 UT, when it began to
brighten, signaling the start of a new activity cycle.  Images
obtained on June 7.0 give V = 17.6, which is typical of the average
levels seen in previous cycles.  The last observed activity cycle
started around 1995 July 17 (IAUC 6192) and ended sometime between
Sept. 17 and Oct. 14, when the source was found again in quiescence.
Observations at other wavelengths (particularly in x-rays, where
weak emission should be detectable) are strongly encouraged."


COMET C/1996 B1 (SZCZEPANSKI)
     Ephemeris from orbital elements on MPC 27080:

1996 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
June  6     9 55.52   -25 38.6   1.992   2.185   86.8   27.6   14.3
     16    10 07.54   -27 28.8   2.182   2.280   82.3   26.2   14.9
     26    10 20.44   -29 17.2   2.370   2.378   78.1   24.7   15.4
July  6    10 34.03   -31 05.4   2.556   2.476   74.0   23.2   15.9
     16    10 48.21   -32 54.3   2.739   2.576   70.0   21.8   16.4
     26    11 02.88   -34 44.7   2.919   2.675   66.2   20.3   16.9
Aug.  5    11 17.97   -36 36.5   3.094   2.776   62.5   18.9   17.3
     15    11 33.45   -38 29.8   3.265   2.876   58.9   17.6   17.7
     25    11 49.30   -40 24.5   3.431   2.976   55.5   16.2   18.2
Sept. 4    12 05.48   -42 20.2   3.590   3.077   52.2   15.0   18.5
     14    12 22.00   -44 16.6   3.743   3.177   49.1   13.9   18.9
     24    12 38.85   -46 13.5   3.888   3.276   46.3   12.8   19.3
Oct.  4    12 56.04   -48 10.2   4.024   3.376   43.9   11.9   19.6
     14    13 13.56   -50 06.4   4.152   3.475   41.9   11.1   19.9
     24    13 31.42   -52 01.8   4.271   3.573   40.5   10.4   20.2
Nov.  3    13 49.60   -53 55.8   4.379   3.672   39.8   10.0   20.5
     13    14 08.10   -55 48.3   4.476   3.769   39.8    9.7   20.8

                      (C) Copyright 1996 CBAT
1996 June 11                   (6416)            Daniel W. E. Green

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