Circular No. 8401
            Central Bureau for Astronomical Telegrams
          INTERNATIONAL ASTRONOMICAL UNION
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S/2004 S 3, S/2004 S 4, AND R/2004 S 1
      C. C. Porco, CICLOPS, Space Science Institute, Boulder; and the 
Cassini Imaging Science Team (cf. IAUC 8389) report the discovery of two 
objects, S/2004 S 3 and S/2004 S 4, orbiting within the F ring of 
Saturn.  S/2004 S 3 orbits just outside the outer strand of the F ring, 
interior to the orbit of Saturn XVII (Pandora), the outer F-ring 
shepherd.  S/2004 S 4 orbits within the inner F ring strand.  S/2004 S 3 
was observed in an imaging sequence specifically designed to search for 
new satellites in the F-ring region and consisting of 19 
narrow-angle-camera clear-filter images taken over 2.3 hr on June 21. 
S/2004 S 4 was observed in a sequence designed to study the photometric 
behavior of Saturn's rings taken five hours later and consisting of four 
narrow-angle- camera images taken 40 s apart in the green, red, blue, 
and near- infrared broadband filters (Porco et al. 2004, Space Sci. 
Rev., in press).  A low-residual single orbit that crosses the F ring 
can be fitted to the motions of both objects, but dynamical 
considerations currently make it unclear whether these objects are one 
and the same body, and whether they are satellites or clumps.  If 
satellites, the objects are approximately 4-5 km across.  Also, a new 
ring of diffuse material, R/2004 S 1, has been seen in Cassini images of 
the F-ring region in the same orbit as the satellite Saturn XV (Atlas).
 
 
SUPERNOVAE 2004eg, 2004eh, AND 2004ei
      Three apparent new supernovae have been discovered on CCD images 
taken by J. Young (2004eg; Table Mountain 0.6-m f/16 reflector + R and I 
filters) and by T. Boles (2004eh and 2004ei; cf. IAUC 8399).

SN       2004 UT        R.A.  (2000.0)  Decl.    Mag.     Offset
2004eg   Sept. 1.488   4 28 08.26  +21 39 18.3   19.5   20" W, 1".4 S
2004eh   Sept. 8.003   2 26 11.82  +27 36 24.1   17.1   7".8 W, 11".6 N
2004ei   Sept. 8.074   3 41 32.69  +37 13 30.2   17.9   4".3 E, 2".9 S

Approximate unfiltered CCD magnitudes from the respective discoverers 
(plus LOSS/KAIT magnitudes by W. Li, who independently found SN 2004eg): 
SN 2004eg in UGC 3053, Feb. 5.12, [20.0 (Li); Aug. 20.48, 18.4 (Li); 
Sept. 1.497, I = 19.0; 2.409, R = 19.5;6.45, 18.6 (Li); 8.445, R = 19.5. 
SN 2004eh in UGC 1892, 2003 Oct. 19, [19.5; Nov. 27, [19.5; 2004 Sept. 
9.001, 18.5.  SN 2004ei in UGC 2817, Jan. 9, [19.5; Feb. 22, [19.5; 
Sept. 8.998, 17.9.  None of the new objects is present on Sky Survey 
images dating to 1988-1991 (limiting red mag 20.8-21.5; limiting blue 
mag 21.5-22.5)
                       (C) Copyright 2004 CBAT
2004 September 9               (8401)            Daniel W. E. Green