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file 1985-1987_S12_veiga.data.txt
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Contents:
- 18 observations made from 1985 March 30 to June 11
- 4 observations made from 1987 July 16 to Aug. 14
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.
Reference:
Veiga C.H., Vieira Martins R.: 2000, Astrometric photographic observations
of Helene, Astron. Astrophys. Suppl. Ser. 143, 405
Format:
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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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