Contents.
planet: 6 - Saturn
satellites: S1-Mimas : 15,
S2-Enceladus :119,
S3-Tethys :271,
S4-Dione :212,
S5-Rhea :255,
S6-Titan :261,
S7-Hyperion :192,
S8-Iapetus :189
total number: 304
type: relative
dates: 1995-1997
observatory: 950 - La Palma
Reference.
Harper D., Beurle K.,I.P.Williams, Murray C.D., Taylor D.B.,
Fitzsimmons A., Cartwright I.M. (1999)
CCD astrometry of Saturn's satellites in 1995 and 1997
Astron. Astrophys. Suppl. Ser. V. 136. P. 257.
1999A&AS__136__257H
Informations.
relative to: Frame
reference frame: astrometric
centre of frame: geocentre
epoch of equinox: no information
time scale: UTC
reduction: no information
coordinates: CCD image pixels
diff. refraction: no information
receptor: CCD
telescope: 1-metre Jacobus Kapteyn Telescope
observers: Harper D., Beurle K.,I.P.Williams, Murray C.D.,
Taylor D.B., Fitzsimmons A., Cartwright I.M.
data included in standard data file: no
Comments.
Total number: 304 (CCD frames)
On the 304 lines of the data-file are put the 1514
positions of the satellites from the CCD frame.
Individual files can be fetched directly from:
ftp://cdsarc.u-strasbg.fr/cats/J/A+AS/136/257
The catalogue can be queried from:
http://vizier.u-strasbg.fr/cgi-bin/VizieR?-source=J/A+AS/136/257
evaluation: From abstract: Analysis of the data as inter-satellite
positions shows that the observations of Tethys, Dione,
Rhea and Titan have root-mean-square residuals
of 0.08 arc-seconds in 1995 and 0.10 arc-seconds
in 1997.
Format.
Byte-by-byte Description of file: *dat.txt
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Bytes Format Units Label Explanations
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1- 4 I4 yr OBS.Y Year of the observation (1)
6- 7 I2 "month" OBS.M Month of the observation (1)
9- 17 F9.6 d OBS.D Day of the observation (1)
19- 23 F5.1 s Exp Length of the exposure;
25- 32 8I1 --- Flags [0/1] Boolean flags indicating presence (1)
or absence (0) of each satellite in the image
33- 40 F8.2 pix xiMimas ? Column coordinate xi of Mimas, if present
41- 48 F8.2 pix etaMimas ? Row coordinate eta of Mimas, if present
49- 56 F8.2 pix xiEnc ? Column coordinate xi of Enceladus,if present
57- 64 F8.2 pix etaEnc ? Row coordinate eta of Enceladus, if present
65- 72 F8.2 pix xiTethys ? Column coordinate xi of Tethys, if present
73- 80 F8.2 pix etaTethys ? Row coordinate eta of Tethys, if present
81- 88 F8.2 pix xiDione ? Column coordinate xi of Dione, if present
89- 96 F8.2 pix etaDione ? Row coordinate eta of Dione, if present
97-104 F8.2 pix xiRhea ? Column coordinate xi of Rhea, if present
105-112 F8.2 pix etaRhea ? Row coordinate eta of Rhea, if present
113-120 F8.2 pix xiTitan ? Column coordinate xi of Titan, if present
121-128 F8.2 pix etaTitan ? Row coordinate eta of Titan, if present
129-137 F9.2 pix xiHyp ? Hyperion {xi} column coordinate, if present
138-146 F9.2 pix etaHyp ? Hyperion {eta} row coordinate, if present
147-154 F8.2 pix xiIap ? Iapetus {xi} column coordinate, if present
155-162 F8.2 pix etaIap ? Iapetus {eta} row coordinate, if present
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Note (1): U.T.C. time of the start of the exposure
Note (2): Add half of this value to the start date to obtain the
mid-exposure time
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