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IAUC 8165: S/2003 (283) 1; NOVAE IN M31

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                                                  Circular No. 8165
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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S/2003 (283) 1
     W. J. Merline, Southwest Research Institute (SwRI); C. Dumas,
Jet Propulsion Laboratory; N. Siegler and L. M. Close, University
of Arizona; C. R. Chapman, P. M. Tamblyn, and D. Terrell, SwRI; A.
Conrad, Keck Observatory; and F. Menard and G. Duvert, Observatoire
de Grenoble, report the discovery on July 14.6 UT of a satellite of
minor planet (283) Emma from K'-band imaging with the 10-m Keck II
Telescope (+ NIRC2/AO adaptive optics system) on Mauna Kea.  On
July 14.5579 the satellite was at separation 0".26 (projected
separation 370 km) and position angle 218 deg; a detection in
H-band was also made on July 14.6026.  The satellite was also
observed by the same team with the European Southern Observatory
8-m Very Large Telescope UT4/YEPUN (+ NAOS/CONICA adaptive optics
system) on July 15.2750, 15.4229, and 16.4375 in bands J, H, and
K_s.  The H-band brightness difference is about 5.5 mag, giving an
estimated diameter of the satellite of about 12 km.

     Three additional apparent novae in M31 have been discovered,
the first two by K. Hornoch (cf. IAUC 8157), and the last two
(independently) by M. Fiaschi, F. Di Mille, and D. Tiveron (cf.
IAUC 8155).  The tabulated data for the first object are from
Hornoch; the remaining tabulated data are from Fiaschi et al.
(whose magnitudes are with an H_alpha filter).  The second object
was found independently by Hornoch near the limit of seven CCD
images, and he provides position end figures 41s.0, 33" (with
offset 43" west and 142" north of the center of M31).

DATE (UT)       R.A. (2000.0) Decl.     Mag.    Offset
July 14.99    0 42 15.81  +41 12 00.5   16.9    318" W, 252" S
July 19.986   0 42 41.10  +41 18 32.0   15.9    36" W, 144" N
July 19.986   0 42 45.10  +41 17 53.7   14.9    9" E, 105" N

Additional [H_alpha] magnitudes by Fiaschi et al.:  Second object,
July 15 UT, [18; 21.020, 16.0.  Third object, July 15, [18; 21.020,
15.0.  Further approximate R-band magnitudes by Hornoch:  First
object, July 11.04, [18.7; 15.99, 17.5; 19.006, 17.5.  Second
object, July 14.988, [18.8; 19.031, 18.5; 21.00, 18.9.  Additional
R magnitudes by Hornoch, from images taken by himself and by L.
Sarounova, of the apparent nova reported on IAUC 8157:  June
30.022, 18.3; July 2.997, 18.6; 3.034, 18.7; 7.993, 18.0; 9.011,

                      (C) Copyright 2003 CBAT
2003 July 27                   (8165)            Daniel W. E. Green

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