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IAUC 7521: S/2000 S 5, S/2000 S 6

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                                                  Circular No. 7521
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
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Phone 617-495-7440/7244/7444 (for emergency use only)


S/2000 S 5 AND S/2000 S 6
     A team led by B. Gladman (cf. IAUC 7512) reports the discovery of two
more satellites of Saturn (selected CCD astrometry below).  Separate
computations by the undersigned and by W. J. Gray (Bowdoinham, ME) indicate
i = 49 deg, e = 0.14, a = 0.074 AU and 47 deg, 0.38, 0.085 AU, respectively,
for the pair.  S/2000 S 2 (cf. MPC 41527) has i = 48 deg, e = 0.46, a = 0.098
AU), whereas S/2000 S 1 and Saturn IX (Phoebe) have retrograde orbits (i =
173 deg.  The orbits of S/2000 S 3 and S 4 are very indeterminate, and further
observations are urgently needed (cf. IAUC 7513).

     2000 UT             R.A. (2000) Decl.        R     Observer
     Aug.  7.39963    3 52 08.02   +18 20 03.0   22.6   Gladman
     Sept.24.44657    3 57 48.21   +18 27 23.0          Kavelaars
     Nov.  2.27282    3 50 26.67   +17 50 21.9          Hergenrother
           3.29969    3 50 08.33   +17 49 01.7            "
           4.22350    3 49 51.61   +17 47 50.0          UT1 Team

     Sept.23.44526    3 57 45.16   +17 42 52.4   22.8   Kavelaars
          24.46410    3 57 41.36   +17 42 34.8   22.6     "
     Nov.  2.29914    3 50 17.20   +17 21 08.1          Hergenrother
           3.30891    3 49 59.47   +17 20 24.2            "
           4.23929    3 49 42.93   +17 19 44.5   22.9   UT1 Team

B. Gladman (European Southern Obs.).  2.2-m refl.  Measurer J.-M. Petit.
J. Kavelaars and B. Gladman (Mauna Kea).  3.6-m Canada-France-Hawaii
   Telescope.  Measurer Gladman.
C. W. Hergenrother, R. J. Whiteley and D. Means (Steward Observatory, Kitt
   Peak).  2.3-m reflector.  Measurer Hergenrother.
UT1 Science Team (Paranal).  ESO VLT-UT1 8-m refl.  Measurer Gladman.

2000 TT     R. A. (2000) Decl.     Delta     r_S   Elong.  dR.A.   dDecl.
Nov. 12     3 47.42    +17 37.4    8.120    0.072  171.0   1638+    546+
     22     3 44.11    +17 23.6    8.104    0.073  176.8   1659+    341+
Dec.  2     3 40.80    +17 10.1    8.121    0.075  166.6   1634+    127+
     12     3 37.68    +16 57.6    8.169    0.076  155.8   1569+     91-
     22     3 34.91    +16 46.9    8.246    0.078  145.0   1469+    304-

Nov. 12     3 47.33    +17 14.0    8.180    0.080  171.0   1562+    855-
     22     3 44.09    +17 06.9    8.164    0.076  176.5   1642+    663-
Dec.  2     3 40.85    +17 00.4    8.179    0.072  166.6   1678+    456-
     12     3 37.78    +16 55.1    8.224    0.068  155.8   1660+    240-
     22     3 35.05    +16 51.6    8.297    0.064  145.0   1585+     23-

                      (C) Copyright 2000 CBAT
2000 November 18               (7521)              Brian G. Marsden

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