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Дата изменения: Tue Jun 22 18:51:00 2004 Дата индексирования: Mon Oct 1 23:32:48 2012 Кодировка: Поисковые слова: mercury surface |
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 --------------------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------------------