-------------------------------------------------------------------
THE ASTRONOMER Electronic Circular No 2126      2005 Jly 03 16.58UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK             GMH at AST.STAR.RL.AC.UK
WORLD WIDE WEB                         http://www.theastronomer.org
-------------------------------------------------------------------
COMET C/2005 N1 (JUELS-HOLVORCEM)
C. W. Juels, Arizona and P. R. Holvorcem, Brazil, have reported on IAUC 
8557 their discovery of a comet on CCD images taken
with a 0.07-m f/2.8 refractor:

      2005 UT             R.A. (2000) Decl.       Mag.
      July  2.44762    3 16 42.45   +34 57 46.1   14.6

In response to a posting on the NEO Confirmation Page, various observers 
have noted the cometary nature of this object.

The available astrometry, including prediscovery observations by Juels 
and Holvorcem on June 30 and July 1), yield preliminary parabolic 
orbital elements [T = 2005 Aug. 21.24 TT, Peri. = 78.94 deg, Node = 3.04 
deg, i = 50.85 deg (equinox 2000.0), q = 1.1380 AU] according to a 
report by Dan Green.

V589 HERCULIS
Dan Taylor, Canada, has reported an outburst of V589 Herculis, which is 
on the Recurrent Objects Programme:
July 02.225UT  14.5  Dan Taylor
Mike Simonsen, USA, has also observed this outburst:
July 02.234UT  14.5  M. Simonsen

Gary Poyner adds that the last observed outburst was on 2004 August 30. 
T. Vanumster detected superhumps during the 2002 outburst, and obtained 
a firm superhump period of 0.0947 +/- 0.0005 d, using the PDM technique. 
This puts V589 Her in the so called 'Period Gap'.

COMET C/2005 A1 (LINEAR)
Mark Kidger, Tenerife, relays that Sensi Pastor and Jose Reyes, have 
observed a split of this comet using a 0.40-m f/6.3 Schmidt-Cassegrain 
telescope and CCD. Selected and brief results appear below:

CK05A01a  C2005 07 03.13859 01 56 06.49 +09 00 11.1    13.9 N  J76
CK05A01a  C2005 07 03.15584 01 56 05.95 +09 00 36.5    13.9 N  J76

CK05A01b  C2005 07 03.13859 01 56 06.22 +09 00 01.5    14.6 N  J76
CK05A01b  C2005 07 03.15584 01 56 05.72 +09 00 27.1    14.6 N  J76

Mark adds by e-mail and Messenger that the presumed fragment is located 
4"W, 10"S of the main nucleus and is 0.7 magnitudes fainter in a 10" 
aperture. The light curve of the comet shows a significant increase in 
brightness since January and Afrho calculated from photometric measures 
by J76 (2005 Jul 03) and 213 (2005 Jun 18) has increased by a factor of 
2 compared to measurements in January, suggesting that there has been an 
outburst that may be associated with the fragmentation. The fragment 
clearly shows the same motion as the comet over the period 03:19-03:44UT 
on 2005 Jul. 3 and is
visible in 13 individual integrations.

Guy M Hurst