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IAUC 2977: RADIO FLARE FROM Cir X-1; A1919+43; PERIODIC COMETS TEMPEL-SWIFT AND NEUJMIN 2

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IAUC number 

                                                  Circular No. 2977
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


RADIO FLARE FROM CIRCINUS X-1
     R. F. Haynes, J. L. Caswell and L. W. Simons, C.S.I.R.O.
Division of Radiophysics, report: "During 6-cm (5009 MHz) continuum
observations of the galactic plane the radio source near R.A = 15h16m.8,
Decl. = -56o59' (equinox 1950.0) was found to flare in intensity from
0.3 Jy on May 28d03h46m UT to 4.1 Jy on May 30d08h43m.  These
observations confirm the suggested association with Cir X-1 (Clark,
Parkinson and Caswell 1975, Nature 254, 674)."


A1919+43
     B. A. Cooke and M. J. Ricketts, X-Ray Astronomy Group, Leicester
University, inform us that Ariel 5 observations around 3U 1921+43
have refined the position to within a 90-percent-confidence
error box with coordinates (equinox 1950.0) R.A. = 19h19m48s, Decl. =
+44o10'; 19h17m53s, +43o45'; 19h18m50s, +43o36'; 19h20m43s, +44o00'.
The source is probably associated with Abell 2319, not CSVS 4693
(IAUC 2972).  The x-ray flux is consistent with that in the 3U
Catalogue and shows no sign of variability on timescales greater
than a few days.


PERIODIC COMETS TEMPEL-SWIFT AND NEUJMIN 2
     The following predicted elements for these lost comets have
been derived by the undersigned.  Handb. Br. Astron. Assoc. for
1976 contains a very similar prediction (including an ephemeris)
for P/Neujmin 2 by N. A. Belyaev.  Neither comet is at al
favorably placed for recovery at its current return.

           P/Tempel-Swift         P/Neujmin 2
   Epoch = 1976 May 22.0          1976 July 1.0 ET
       T = 1976 May 25.7850       1976 June 18.2747 ET
   Peri. = 163.7882               214.8946
   Node  = 240.0178               307.2299    1950.0
   Incl. =  13.4607                 5.3642
       q =   1.599513               1.277018 AU
       e =   0.536446               0.585157
       a =   3.450542               3.078313 AU
       n =   0.1537705              0.1824882
       P =   6.410                  5.401 years


1976 July 23                   (2977)              Brian G. Marsden

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