Contents.
planet: 6 - Saturn
satellites: S1-Mimas : 73,
S2-Enceladus :199,
S3-Tethys :212,
S4-Dione :204,
S5-Rhea :225,
S6-Titan :153,
S7-Hyperion : 88,
S8-Iapetus : 52
total number: 278 (CCD frames)
type: relative
dates: 1990-1994
observatory: 950 - La Palma - 950
Reference.
Harper D., Murray C.D., Beurle K., Williams I.P., Jones D.H.P.,
Taylor D.B., Greaves S.C. (1997)
CCD astrometry of Saturn's satellites 1990-1994.
Astron. Astrophys. Suppl. Ser. V. 121. P. 65.
1997A&AS__121___65H
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., Murray C.D., Beurle K., Williams I.P.,
Jones D.H.P., Taylor D.B., Greaves S.C.
data included in standard data file: no
Comments.
Total number: 278 (CCD frames)
On the 278 lines of the data-file are put the 1206
positions of the satellites on the CCD frame.
Individual files can be fetched directly from:
ftp://cdsarc.u-strasbg.fr/cats/J/A+AS/121/65
The catalogue can be queried from:
http://vizier.u-strasbg.fr/cgi-bin/VizieR?-source=J/A+AS/121/65
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 arcseconds, corresponding to 500km at the
distance of Saturn.
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; add half of this value
to the start date to obtain the mid-exposure
time
25- 32 8I1 --- Boo [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
129-136 F8.2 pix xiHyp ? Column coordinate xi of Hyperion, if present
137-144 F8.2 pix etaHyp ? Row coordinate eta of Hyperion, if present
145-152 F8.2 pix xiIap ? Column coordinate xi of Iapetus, if present
153-160 F8.2 pix etaIap ? Row coordinate eta of Iapetus, if present
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Note (1): The year, month and day give U.T.C. time of the start
of the exposure
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