Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7231: V348 Sgr; P/1999 P1

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 7230 SEARCH Read IAUC 7232

View IAUC 7231 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7231
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, 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)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


V348 SAGITTARII
     A. U. Landolt, Louisiana State University; and A. K. Uomoto, Johns
Hopkins University, observing with a CCD at the Las Campanas Observatory
2.5-m du Pont telescope, find the following preliminary V magnitudes for
this unusual object (cf. IAUC 5640): "July 31.18 UT, 18.10; Aug. 1.15,
18.18; 2.18, 18.05; 3.19, 17.63; and 4.19, 17.66.  The data indicate that
the star may have begun a recovery from its most recent minimum."


COMET P/1999 P1 (MACHHOLZ 2)
     R. H. McNaught reports his recovery of comet P/1994 P1 (= 1994o =
1994 XXVI) on CCD images obtained with the 1.0-m f/8 reflector at Siding
Spring.  The object is of stellar appearance.  The indicated correction
to the prediction by B. G. Marsden on MPC 27082 (for component A) is
Delta T = +0.8 day.  Seeing was good on Aug. 4, and there was no sign of
any other components within Delta T = +/- 1.5 days.

     1999 UT             R.A. (2000) Decl.        m2
     Aug.  3.55335   16 49 18.57   -11 11 12.3   20.8
           3.55958   16 49 18.26   -11 11 11.7   20.3
           3.57818   16 49 17.25   -11 11 07.9   20.4
           4.42617   16 48 36.00   -11 08 49.8
           4.42864   16 48 35.88   -11 08 49.4
           4.43115   16 48 35.76   -11 08 49.1
           4.43396   16 48 35.61   -11 08 48.6

Further orbital computations by the undersigned confirm that if the
above observations are of the same object that was observed at Siding
Spring on 1995 Mar. 29 and 30 (MPC 25097), this is indeed component A.
However, attempts to link all the observations (back to 1994 Aug. 15),
even using the nongravitational parameters A1 and A2, have not been
satisfactory.  But the following gravitational solution gives an acceptable
fit to 67 observations back to 1994 Oct. 2 (mean residual 0".9; earlier
residuals increasing to 20"):

                    Epoch = 1999 Dec.  8.0 TT
     T = 1999 Dec.  9.2798 TT         Peri. = 149.3039
     e = 0.751095                     Node  = 246.1346  2000.0
     q = 0.748938 AU                  Incl. =  12.8112
       a =  3.008934 AU    n = 0.1888362    P =   5.219 years

                      (C) Copyright 1999 CBAT
1999 August 4                  (7231)              Brian G. Marsden

Read IAUC 7230 SEARCH Read IAUC 7232

View IAUC 7231 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!