Astronomical Data Center

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/journal_tables/A+AS/143/405/

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J/A+AS/143/405      Astrometric observations of Helene       (Veiga+, 2000)
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Astrometric photographic observations of Helene.
     Veiga C.H., Vieira Martins R.
    <Astron. Astrophys. Suppl. Ser. 143, 405 (2000)>
    =2000A&AS..143..405V
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ADC_Keywords: Planets ; Positional data
Keywords: astrometry -  planets and satellites - Saturn

Abstract:
    Astrometric photographic positions of the Saturnian satellite Helene
    obtained from 22 plates taken in 6 nights are presented. The
    observations are distributed between 5 missions in 1985 and 1987. All
    positions are compared with those calculated by Jacobson (1999,
    personal communication). The residuals have mean and standard
    deviation smaller than 0.25" and 0.30" respectively.

File Summary:
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 FileName      Lrecl  Records   Explanations
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ReadMe            80        .   This file
table1.dat        46       22   Observed positions of Helene
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See also:
   J/A+AS/121/65  : 1990-1994 Saturn's satellites astrometry (Harper+ 1997)
   J/A+AS/136/257 : Saturn's satellites in 1995/97 (Harper+ 1999)
   J/A+AS/139/305 : Position of Saturn's satellites (1982-1988) (Veiga+, 1999)

Byte-by-byte Description of file: table1.dat
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   Bytes Format Units   Label     Explanations
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   1-  4  I4    yr      Obs.Y     Year of the mean instant of observation
       6  I1    ---     Obs.M     Month of the mean instant of observation
   8- 15  F8.5  d       Obs.D     Decimal day of the mean instant of observation
  17- 24  F8.3  arcsec  X         Differential topocentric coordinate,
                                   {Delta}RAcosDE (1)
  26- 32  F7.3  arcsec  Y         Differential topocentric coordinate,
                                   {Delta}DE (1)
  34- 39  F6.3  arcsec  (O-C)X    Observed minus calculated value of X
  41- 46  F6.3  arcsec  (O-C)Y    Observed minus calculated value of Y
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Note (1): Differential topocentric coordinates are referred to Titan.
           The reference system is defined by the mean equator and equinox J2000
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History: Prepared via OCR at CDS.

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(End)                                        Patricia Bauer [CDS]    12-May-2000
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