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Observations of coorbital satellites of Saturn in 2004-2005
Emelyanov N. V., Varfolomeev M. I.
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Description:
To improve the orbital parameters and masses of coorbital satellites
of Saturn, Janus and Epimetheus, new observations of these satellites
are necessary. Usually these satellites are observable only during
the Earth and Sun crossings of Saturn's ring plane which occur once
in 14 years. Recently other ways of observing these satellites were found.
This paper contains precalculated dates of possible observations of Janus
and Epimetheus in 2004-2005. All necessary data on the events are contained
in the table. Each table line contains information on one single event.
The first 4 columns give the moment of the event with a precision
to within 1 second. It should be repeated that the duration of each passing
near the Saturn’s pole is about 30-40 minutes, so the observations may be
begun 15-20 minutes before the indicated moment. The next column contains
the designation of the satellite, which will be observed at this time:
S10 is Janus, S11 is Epimetheus. The next column describes the nature
of the event: 'pole' means that the ring is occulted by the disk of Saturn
and the corresponding satellite is in superior conjunction; 'shade'
means that the satellite passes near the shaded part of Saturn’s ring.

File Summary:
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FileName Lrecl Records Explanations
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ReadMeT.txt 80 . This file
table1.txt 47 1219 Precalculated dates of possible observations
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Byte-by-byte Description of files: table1.txt
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Bytes Format Units Label Explanations
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1- 14 F14.6 d JD Julian Date (TT)
17- 20 I4 --- YYYY Year of the date
22- 23 I2 --- MM Month number of the date
25- 26 I2 d DD Day of the date
29- 30 I2 h HH Hour of the date (TT)
32- 33 I2 m MM Minutes of the date (TT)
35- 36 I2 s SS Secondes of the date (TT)
39- 41 A3 --- SAT Observable satellite, see Note (1)
43- 47 A5 --- POS Sircumstances, see Note (2)
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Note (1):
S10: Janus
S11: Epimetheus
Note (2):
pole : the ring is occulted by the disk of Saturn and the
corresponding satellite is in superior conjunction
shade: the satellite passes near the shaded part of Saturn’s ring
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Acknowledgements: This work was supported by the Russian Foundation for Basic
Research, project no. 03-02-17441.

References:
Nicholson P.D. et al., 1992Icar..100..464N, New observations of Saturn's
coorbital satellites

Emel’yanov N.V., 1996AstL...22..135E, A new tool for providing observations
of planetary satellites with ephemerides

Emel'yanov N.V., 2001SoSyR..35..209E, Visible Encounters of the Outermost
Satellites of Jupiter

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(End) 01-June-2004