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IAUC 8316: 2004bd; 1999 DJ_4; V5114 Sgr

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                                                  Circular No. 8316
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
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SUPERNOVA 2004bd IN NGC 3786
     M. Armstrong, Rolvenden, U.K., reports his discovery of an
apparent supernova (mag about 14.3) on unfiltered CCD images taken
on Apr. 7.120 and 7.847 UT with a 0.35-m reflector.  SN 2004bd is
located at R.A. = 11h39m42s.18, Decl. = +31o54'31".8 (equinox
2000.0), which is approximately 4".7 west and 1".2 south of the
center of NGC 3786.  Nothing was visible at this position on
Armstrong's images taken on 2000 Dec. 30, 2003 May 25, and Dec. 7
or on Palomar Sky survey red and blue plates.  M. Mobberley,
Cockfield, U.K., confirmed the new object on an unfiltered CCD
image taken on Apr. 7.831.

1999 DJ_4
     P. Pravec, P. Kusnirak, and L. Sarounova, Ondrejov Observatory;
P. Brown and N. Kaiser, University of Western Ontario (UWO); G.
Masi, University of Rome 'Tor Vergata'; and F. Mallia, Latina,
Italy, report that photometric observations -- obtained during Feb.
21-Mar. 28 at Ondrejov, UWO's Elginfield Observatory, and the
Tenagra II telescope near Nogales, AZ -- show that the Apollo-type
minor planet 1999 DJ_4 is a binary system with an orbital period of
17.72 hr.  The primary rotates with a period of 2.514 hr, and its
lightcurve amplitude of 0.10 mag is indicative of a nearly
spheroidal shape.  Mutual eclipse/occultation events that are 0.2
mag deep indicate a secondary-to-primary mean-diameter ratio of 0.4
or greater.  Further observations, especially radar and
spectroscopic, are desirable.

     M. Soma, National Astronomical Observatory of Japan,
reports that V5114 Sgr will be occulted by the moon numerous
times this year, providing the following dates and approximate
areas of visibility:  Apr. 10, China; May 8, western Europe;
June 4, northern Japan; July 2, Europe; July 29, Japan;
Aug. 25, Europe and northern Africa; Sept. 22, eastern USA.
     Visual magnitude estimates:  Mar. 17.190 UT, 8.0 (J. D.
Shanklin, Rothera, Antarctica);
18.162, 9.4 (M. Lehky, Hradec Kralove, Czech Rep.);
18.801, 8.8 (A. Pearce, Nedlands, W. Australia);
19.828, 8.9 (Pearce);
21.826, 9.1 (Pearce);
22.249, 9.3 (R. Y. Shida, Sao Paulo, Brazil).
23.865, 9.6 (Pearce, Noble Falls, W. Australia);
25.13, 9.5 (Shanklin, Stanley, Falkland Islands);
25.835, 9.8 (Pearce);
28.177, 10.0 (P. Schmeer, Bischmisheim, Germany);
29.172, 10.3 (Schmeer);
30.164, 10.4 (Schmeer);
30.459, 10.2 (J. D. West, Mulvane, KS);
Apr. 2.778, 10.6 (S. Yoshida, Ibaraki, Japan).

                      (C) Copyright 2004 CBAT
2004 April 7                   (8316)            Daniel W. E. Green

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