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 ----------------------------------------------------------------------------- Bytes Format Units Label Explanations ----------------------------------------------------------------------------- 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 ----------------------------------------------------------------------------- Note (1): The year, month and day give U.T.C. time of the start of the exposure ------------------------------------------------------------------------