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J/A+AS/121/65       1990-1994 Saturn's satellites astrometry      (Harper+ 1997)
CCD astrometry of Saturn's satellites 1990-1994
      Harper D., Murray C.D., Beurle K., Williams I.P., Jones D.H.P.,
      Taylor D.B., Greaves S.C.
     <Astron. Astrophys. Suppl. Ser. 121, 65 (1997)>
     =1997A&AS..121...65H      (SIMBAD/NED BibCode)
ADC_Keywords: Planets ; Positional data

Keywords: satellites of Saturn - astrometry


Description:
    In this paper, we publish 1206 measurements of positions of the major
    satellites of Saturn made in 1990, 1991, 1993 and 1994 using CCD
    detectors attached to the 1-metre Jacobus Kapteyn Telescope on the
    island of La Palma. 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.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table6           160      152   Observations made in 1990
table7           160       58   Observations made in 1991
table8           160       35   Observations made in 1993
table9           160       33   Observations made in 1994


See also:
    J/A+AS/136/257 : Saturn's satellites in 1995/97  (Harper+ 1999)
    J/A+AS/120/107 : 1989-1994 CCD observations of Triton (Veiga+ 1996)
    J/A+AS/131/291 : 1995-1997 CCD positions of Triton (Veiga+ 1998)
    J/A+AS/136/445 : CCD observations of Nereid (Veiga 1999)
    J/A+AS/139/305 : Position of Saturn's satellites (1982-1988) (Veiga+, 1999)
    J/A+AS/139/47  : 1995 Saturnian satellites mutual events  (Emelianov+, 1999)
    J/A+AS/143/405 : Astrometric observations of Helene (Veiga+, 2000)
    J/A+A/383/296  : Saturnian Satellites positions (1996-2000) (Peng+, 2002)
    J/A+A/391/767  : CCD obs. of Phoebe in 1998-1999 (Fienga+, 2002)
    J/A+A/422/377  : 1997-2000 1994 Saturn's satellites astrometry (Qiao+, 2004)


Byte-by-byte Description of file: table6 table7 table8 table9

   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



Acknowledgements: David Harper 

(End)                                         Patricia Bauer [CDS]   29-Jul-1996