J/A+AS/118/105 Pluto 1991-1994 observations (Ryl'kov+, 1996)
Photographic observations of Pluto 1991-1994 with the Baldone Schmidt telescope. Ryl'kov V.P., Dement'eva A.A., Alksnis A., Straume J.I. <Astron. Astrophys. Suppl. Ser. 118, 105 (1996)> =1996A&AS..118..105R (SIMBAD/NED BibCode)
ADC_Keywords: Planets ; Positional data Keywords: astrometry - planets and satellites: individual: Pluto Description: 55 equatorial geocentric coordinates of Pluto from the photographic observations for 1991-1994 are presented in the table. The observations were carried out by Latvian astronomers using the 80/120/240 cm Schmidt telescope at Baldone near Riga. 34 plates were measured and the positions of Pluto were reduced by using the 12-21 reference stars from catalogue of southern stars FOCAT-S, created at Pulkovo. The mean reduction errors vary from 0.23" to 0.34" for both coordinates. The obtained Pluto positions were compared with the ephemeris JPL DE200 (the residuals (O-C) were calculated). The increase of the average annual (O-C) residuals in RA, already noticed in previous works by the Pulkovo authors, is confirmed. From observations, represented in 1994 the (O-C) residuals with respect to DE200 have reached in RA +2.32±0.07" and in Dec. -0.74±0.07". More detailed information on obtaining the Pluto positions is given in Ryl'kov (1993) and Ryl'kov et.al. (1993). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 75 55 Equatorial geocentric coordinates of Pluto from the observations 1991-1994 with the Baldone Schmidt telescope.
Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 5 I5 --- No Plate number, photographed with Schmidt telescope 8- 15 A8 "DD/MM/YY" Date Observation date 18- 31 F14.6 d JD Julian day 34- 35 I2 h RAh Right ascension J2000.0 37- 38 I2 min RAm Right ascension J2000.0 40- 45 F6.3 s RAs Right ascension J2000.0 47 A1 --- DE- Declination sign 48 I1 deg DEd Declination J2000.0 50- 51 I2 arcmin DEm Declination J2000.0 53- 57 F5.2 arcsec DEs Declination J2000.0 60- 64 F5.3 s DRA Residuals (O-C) in RA 66- 70 F5.2 arcsec DDE Residuals (O-C) in DE 73- 75 A3 --- Obs Abbreviations of observer names (1)
Note (1): Observers with the Baldone Schmidt telescope: Al. - A.Alksnis, Eg. - I.Eglitis, Jr. - I.Jurgitis, Pu. - I.Pundure, St. - J.I.Straume.
(End) Patricia Bauer [CDS] 01-Apr-1996
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