J/A+AS/143/405 Astrometric observations of Helene (Veiga+, 2000)
Astrometric photographic observations of Helene.
Veiga C.H., Vieira Martins R.
<Astron. Astrophys. Suppl. Ser. 143, 405 (2000)>
=2000A&AS..143..405V 2000A&AS..143..405V
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,
ΔRAcosDE (1)
26- 32 F7.3 arcsec Y Differential topocentric coordinate,
ΔDE (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.
(End) Patricia Bauer [CDS] 12-May-2000