Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7653: C/2001 A2

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 7652 SEARCH Read IAUC 7654

View IAUC 7653 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7653
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2001 A2 (LINEAR)
     D. Schleicher, Lowell Observatory; and R. Greer, Wittenberg
University, write:  "We obtained six sets of narrowband photometry
of comet C/2001 A2 on June 27 and 28, using the Hall 1.1-m
telescope at Lowell Observatory, with the following averaged
results:  log Q(OH) = 28.68; log Q(CN) = 26.09; log Af(rho) = 2.46
(445 nm; cf. IAUC 7342).  The equivalent log Q(water; vectorial) is
28.81.  No significant temporal or aperture variations were
observed."
     Ephemeris extension to IAUC 7638 (elements MPEC 2001-M48):

2001 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
June 30     0 52.11   - 6 41.9   0.244   1.041   89.0   77.5    4.1
July  2     0 28.82   - 3 07.7   0.245   1.065   94.8   72.0    4.2
      4     0 06.03   + 0 23.4   0.249   1.090  100.5   66.5    4.4
      6    23 44.06   + 3 43.9   0.256   1.115  106.1   61.2    4.5
      8    23 23.16   + 6 48.1   0.266   1.141  111.3   56.1    4.7
     10    23 03.51   + 9 32.5   0.279   1.166  116.1   51.5    4.9
     12    22 45.22   +11 55.6   0.294   1.192  120.4   47.3    5.1
     14    22 28.32   +13 57.7   0.311   1.219  124.2   43.6    5.3
     16    22 12.82   +15 40.0   0.330   1.245  127.6   40.3    5.5
     18    21 58.65   +17 04.3   0.351   1.272  130.5   37.4    5.8
     20    21 45.75   +18 12.8   0.373   1.299  132.9   34.9    6.0
     22    21 34.05   +19 07.5   0.396   1.326  135.0   32.8    6.2
     24    21 23.45   +19 50.5   0.421   1.353  136.7   31.0    6.4
     26    21 13.87   +20 23.3   0.446   1.381  138.1   29.4    6.6
     28    21 05.22   +20 47.7   0.473   1.408  139.2   28.1    6.9
     30    20 57.42   +21 05.0   0.500   1.435  140.1   27.0    7.1

Aug.  9    20 28.75   +21 18.1   0.650   1.573  141.1   23.9    8.0
     19    20 12.47   +20 24.9   0.815   1.710  138.5   23.1    8.9
     29    20 04.33   +19 06.9   0.996   1.847  134.1   23.1    9.7
Sept. 8    20 01.72   +17 44.2   1.189   1.982  128.8   23.3   10.3
     18    20 02.97   +16 26.0   1.395   2.116  122.9   23.5   11.0
     28    20 07.04   +15 17.2   1.611   2.248  116.8   23.5   11.6

     Visual m_1 estimates:  June 21.11 UT, 4.1 (N. Biver, Chisamba,
Zambia, naked eye); 22.36, 4.1 (A. Amorim, Florianopolis, Brazil,
naked eye); 24.75, 3.8 (D. A. J. Seargent, The Entrance, N.S.W.,
naked eye); 26.73, 4.4 (P. Kemp, Auckland, New Zealand, 8x50
binoculars); 27.47, 4.2 (C. S. Morris, Fillmore, CA, 10x50
binoculars); 28.36, 4.6 (Amorim); 29.38, 4.2 (L. A. Mansilla,
Canopus de Rosario, Argentina, 7x50 binoculars).

                      (C) Copyright 2001 CBAT
2001 June 29                   (7653)            Daniel W. E. Green

Read IAUC 7652 SEARCH Read IAUC 7654

View IAUC 7653 in .dvi or .ps format.

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

Valid HTML 4.01!