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IAUC 7106: 1999Y; 1999Z; 1998es, 1999D; C/1998 M5

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                                                  Circular No. 7106
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
Phone 617-495-7244/7440/7444 (for emergency use only)

     D. Reiss, Department of Astronomy, University of Washington,
reports the discovery by the Mount Stromlo Abell Cluster Supernova
Search Team (cf. IAUC 6639) of an apparent supernova (V = 19.0) on
V and R CCD images (limiting mag V = 21.0) taken on Jan. 10 by S.
Sabine at the Mount Stromlo 1.27-m telescope (+ Macho Camera).  SN
1999Y is located near Abell 3142 at R.A. = 3h36m55s.81, Decl. =
-39o33'04".9 (equinox 2000.0), which is 3".8 west and 0".9 south of
the host galaxy's center.  A nearby star has position end figures
57s.39, 51".7.  SN 1999Y was not visible on similar images taken on
Dec. 23 (limiting mag V = 21.0), but it was confirmed by D. Reiss
and L. Germany with the Cerro Tololo 0.9-m reflector in 120-s
exposures (in B, V, R, and I) obtained on Jan. 13 and 14, in which
it appeared about 0.3 mag brighter.  Finding charts are available
at http://msowww.anu.edu.au/~reiss/Abell_SNSearch.

     M. Schwartz, Cottage Grove, OR, reports his discovery of an
apparent supernova (mag 16.2) on an unfiltered CCD frame taken on
Feb. 8.437 UT with the Tenagra I 0.35-m internet-controlled
supernova patrol telescope in Sonoita, AZ.  SN 1999Z is located at
R.A. = 10h22m37s.23, Decl. = +27o21'19".8 (equinox 2000.0), which
is about 3".6 west and 9" south of the nucleus of UGC 5608.  The
new object was confirmed on a frame taken on Feb. 9.153.  The
object does not appear on either the first or the second Palomar
Sky Survey scans, and it is absent from the USNO A1.0 catalogue.
P. Zhao confirms the existence of this star on Feb. 9.366 from an
observation made with the F. L. Whipple Observatory 1.2-m telescope
(+ AndyCam + BVRI filters).

     E. Prosperi, Larciano, Italy, reports the following CCD
magnitudes (cf. IAUC 7094):  SN 1998es in NGC 632, Feb. 6.747 UT, R
= 15.2; SN 1999D in NGC 3690, Feb. 6.998, R = 15.8.

     Visual m_1 estimates:  Jan. 4.98 UT, 9.5 (J. Bortle,
Stormville, NY, 0.41-cm reflector); 20.78, 9.3 (M. Meyer,
Frauenstein, Germany, 20x100 binoculars); Feb. 5.78, 9.7 (R. J.
Bouma, Groningen, The Netherlands, 0.25-m refl.); 9.18, 9.7 (K.
Hornoch, Lelekovice, Czech Rep., 10x80 binoculars).

                      (C) Copyright 1999 CBAT
1999 February 9                (7106)            Daniel W. E. Green

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