IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 6457: P/1996 N2; BL Lac

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 6456  SEARCH Read IAUC 6458

View IAUC 6457 in .dvi or .ps format.
IAUC number


                                                  Circular No. 6457
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)


COMET P/1996 N2 (ELST-PIZARRO)
     The orbital elements below, by the undersigned, are from 15
observations July 14-Aug. 21.  Identity with the asteroidal object
1979 OW7, observed at Siding Spring and Palomar on 1979 July 24 and 25
at mag 19.5, seems likely (with T = 1979 July 13.9).

     T = 1996 Apr. 16.0159 TT         Peri. = 132.4528
     e = 0.170415                     Node  = 160.3483  2000.0
     q = 2.617717 AU                  Incl. =   1.3754
       a =  3.155453 AU    n = 0.1758375    P =   5.605 years

1996 TT     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Aug. 15    21 40.78    -13 11.7    1.657    2.670  179.1    0.3     17.4
     20    21 37.03    -13 33.4    1.665    2.674  174.8    2.0     17.4
     25    21 33.40    -13 54.4    1.680    2.679  169.0    4.1     17.4
     30    21 30.02    -14 14.1    1.700    2.683  163.3    6.2     17.4
Sept. 4    21 26.98    -14 31.9    1.728    2.688  157.7    8.2     17.5
      9    21 24.37    -14 47.5    1.761    2.693  152.2   10.1     17.5
     14    21 22.26    -15 00.6    1.800    2.698  146.7   11.8     17.6
     19    21 20.71    -15 10.9    1.844    2.703  141.5   13.4     17.6
     24    21 19.76    -15 18.3    1.893    2.708  136.3   14.8     17.7
     29    21 19.42    -15 22.8    1.946    2.714  131.3   16.1     17.8
Oct.  4    21 19.69    -15 24.3    2.003    2.719  126.4   17.2     17.9
      9    21 20.56    -15 22.9    2.064    2.725  121.7   18.2     17.9
     14    21 22.02    -15 18.6    2.128    2.731  117.1   19.0     18.0
     19    21 24.05    -15 11.5    2.194    2.737  112.7   19.6     18.1
     24    21 26.60    -15 01.6    2.262    2.743  108.3   20.1     18.2
     29    21 29.65    -14 49.1    2.332    2.749  104.1   20.5     18.2
Nov.  3    21 33.16    -14 34.0    2.404    2.755  100.0   20.8     18.3
      8    21 37.10    -14 16.5    2.476    2.761   96.0   20.9     18.4
     13    21 41.42    -13 56.6    2.550    2.768   92.0   20.9     18.5


BL LACERTAE
     R. Nesci and E. Massaro, Istituto Astronomico, Universita di Roma
"La Sapienza", report that the emission lines observed last year in BL Lac by
Vermeulen et al. (IAUC 6176) have disappeared.  Observations were
made on Aug. 7 with the 1.5-m telescope of the Loiano Observatory
at 1.2-nm resolution; an upper limit of about 0.1 nm can be
established for the H alpha line equivalent width, against the
0.7-nm observed width last year.

                      (C) Copyright 1996 CBAT
1996 August 21                 (6457)              Brian G. Marsden

Read IAUC 6456  SEARCH Read IAUC 6458

View IAUC 6457 in .dvi or .ps format.


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


Valid HTML 4.01!