J/A+AS/132/195 Astrolabe observations of the Sun in 1995-1997 (Noel 1998)
Observations of the Sun with the astrolabe of Santiago: 1995-1997
Noel F.
<Astron. Astrophys. Suppl. Ser. 132, 195 (1998)>
=1998A&AS..132..195N 1998A&AS..132..195N (SIMBAD/NED BibCode)
ADC_Keywords: Sun; Positional data
Keywords: astrometry - Sun: general
Abstract:
Observations of the Sun with a modified Danjon astrolabe at 30°
and 60° zenith distances have been carried out since 1990 at
Santiago, Chile. Here are presented the results in right ascension,
parameter Y and apparent semidiameter obtained during the period
1995-1997. These results and those obtained in for mer years are
available in electronic form. The differences astrolabe minus
ephemeris in α and semidiameter are briefly discussed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 79 354 Sun observations at 30° zenith distance
table3.dat 79 659 Sun observations at 60° zenith distance
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See also:
J/A+AS/102/11 : Astrolabe observations of the Sun in 1990-1992 (Noel 1993)
J/A+AS/106/327 : Observations of the Sun during 1993 at Santiago (Noel 1994)
J/A+AS/106/441 : Second catalogue of Santiago (Noel, 1994)
J/A+AS/113/131 : Observations of the Sun during 1994 (Noel, 1995)
J/A+A/375/614 : Astrolabe observations of the Sun in 1990-2000 (Noel, 2001)
J/A+A/384/650 : CCD solar diameter measurements in 1999-2000 (Penna+, 2002)
J/A+AS/135/227 : Solar diameter observations in 1997-1998 (Jilinski+, 1999)
J/A+AS/143/265 : Solar diameter observations in 1998-1999 (Puliaev+, 2000)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 "DD/MM/YY" Date Observation date
10- 18 F9.3 d MJD Modified Julian day
20- 24 F5.2 arcsec Zeu ?=99.99 Zenith distance residual east upper border
26- 30 F5.2 arcsec Zel ?=99.99 Zenith distance residual east lower border
32- 36 F5.2 arcsec Zwl ?=99.99 Zenith distance residual west lower border
38- 42 F5.2 arcsec Zwu ?=99.99 Zenith distance residual west upper border
44- 49 F6.3 s dRA ?=99.999 Right ascension (observed-ephemeris)
51- 55 F5.3 s e_dRA ?=9.999 rms uncertainty on dAlpha
57- 61 F5.2 arcsec Y ?=99.99 Zenith distance (Observed-Adopted) +
Declination(O-C) cos S.
63- 67 F5.2 arcsec dDSun ?=99.99 Sun semi-diameter (O-C)
69- 72 F4.2 arcsec e_dDSun ?=9.99 Sigma of dDSun and Y
74- 79 F6.2 arcsec DSun ?=0.00 Observed Sun semi-diameter reduced to AU.
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Acknowledgements: Fernando Noel
(End) Patricia Bauer [CDS] 05-May-1998