Contents.
      planet: 5 - Jupiter
  satellites: J6 - Himalia  : 14,
              J7 - Elara    : 11,
              J8 - Pasiphae : 13,
              J9 - Sinope   :  3,
             J10 - Lysithea :  2,
             J11 - Carme    :  8,
             J12 - Ananke   :  2
total number: 53
        type: absolute
       dates: 1990-1992
 observatory: 381 - Tokyo-Kiso

Reference.
   Nakamura Tsuko, and Sasaki Goro, (1998)
   Astrometric Observations of the Jovian Outer Satellites for 1990-1992.
   Astronomical Journal. V. 115. N. 4. P. 1664-1666.
   1998AJ____115_1664N

Informations.
         relative to: absolute
     reference frame: astrometric (see comments below)
     centre of frame: topocentre
    epoch of equinox: B1950.0 and J2000 (see comments)
          time scale: UTC
           reduction: PDSP plate reduction software (see comments below)
         coordinates: absolute
    diff. refraction: no information
            receptor: photographic
           telescope: Schmidt telescope, D = 1.05 m.
           observers: Nakamura T., Sasaki G.
 data included in standard data file: no

Comments.
         1. Positions in columns 5 - 10 (equinox B1950.0)
            are obtained directly from PDSP plate
            reduction software, so they are astrometric positions affected
            by the E-term of aberration.
         2. Positions in columns 11 - 16 (equinox J2000.0) are astrographic
            positions free from the E-term of aberration, which were
            converted from B1950.0 to J2000.0 using the procedure
            recommended by the IAU Comission 20 Ad Hoc System
            Transition Committee (1990). The conversion formulae are
            basicallythe same as those seen in the Explanatory
            Supplement to the Astronomical Almanac (Standish et al. 1992).
         3. Values in the column 17, 18 are the formal standard deviations
            of the residuals in the plate solutuion.


Format.
  1. Number of satellite (N sat): 6 - J6, 7 - J7, 8 - J8, 9 - J9,
                                 10 - J10, 11 - J11, 12 - J12
  2. Year   of the moment of observation
  3. Month  of the moment of observation
  4. Day with decimals of the moment of observation
  5. Hour   of right ascension (alpha, h), B1950.0
  6. Minute of right ascension (alpha, m), B1950.0
  7. Second of right ascension (alpha, s), B1950.0
  8. Degree of declination (delta, deg), B1950.0
  9. Minute of declination (delta, '  ), B1950.0
 10. Second of declination (delta, '' ), B1950.0
 11. Hour   of right ascension (alpha, h), J2000
 12. Minute of right ascension (alpha, m), J2000
 13. Second of right ascension (alpha, s), J2000
 14. Degree of declination (delta, deg), J2000
 15. Minute of declination (delta, '  ), J2000
 16. Second of declination (delta, '' ), J2000
 17. Unsertainty in Delta(alpha) cos(delta), arcsec
 18. Unsertainty in Delta(delta), arcsec

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   Year                  alpha       delta          alpha        delta        Unsertainties
N       month           B1950.0     B1950.0        J2000.0      J2000.0    D(alpha)  D(delta)
sat        day         h  m  s     deg  '  ''     h  m  s     deg  '  ''   cos(delta)
           with decimals                                                   arcsec    arcsec
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