Search

Start Over Subject astrometry Capability Type Table Access Protocol
641. Tokyo Photoelectric Meridian Circle Catalog 1988
ID:
ivo://CDS.VizieR/I/188
Title:
Tokyo Photoelectric Meridian Circle Catalog 1988
Short Name:
I/188
Date:
21 Oct 2021
Publisher:
CDS
Description:
The fourth annual catalog of the Tokyo PMC is presented for 3800 stars (Part I and Part II) which had been observed at least two times in the 1988 period, that is, from January 1, 1988, to December 31, 1988. The positions of the stars given in the catalog are those at the mean epoch of observations. The coordinates of the catalog are based on the FK5 system, and are referred to the equinox and equator of J2000.0. The positions of five major and nine minor planets are also given in the present catalog (Part III) for all individual observations made in 1986 to 1988. The planetary positions are based on the same coordinate systems as those of the corresponding annual star catalogs, the Tokyo PMC Catalogs 86, 87, and 88. The mean trends of the observed positions - FK5 positions for the basic FK5 stars are constructed and compared with those of the Tokyo PMC Catalogs 86 and 87. As for the planets, their observed positions are compared with the positions of the JPL's planetary ephemeris DE200. We find that the ephemerides of the outermost planets, Uranus and Neptune, have some systematic deviations of a few tenths of arcsec in longitudes.
642. Tokyo Photoelectric Meridian Circle Catalog 1989
ID:
ivo://CDS.VizieR/I/198
Title:
Tokyo Photoelectric Meridian Circle Catalog 1989
Short Name:
I/198
Date:
21 Oct 2021
Publisher:
CDS
Description:
The fifth annual catalog of the Tokyo PMC is presented for 3466 stars (Part I and Part II) which were observed at least two times in the 1989 period, that is, from January 1, 1989, to December 31, 1989. The positions of the stars given in the catalog are those at the mean epoch of observations. The coordinates of the catalog are based on the FK5 system, and refer to the equinox and equator of J2000.0. The values of (O-C)s in the catalog are calculated by using the positions given in the source catalog, and by evaluating those at the mean epoch of observations of each star, with the equinox and equator at the mean epoch. The magnitudes of the stars given in the catalog can be transformed into the V-magnitude of the standard UBV system by the equation: V = V(TPMC) + 0.063 ( B-V ) - 0.045. The mean trends of the observed positions-FK5 positions for the basic FK5 stars are constructed and compared with those of the Tokyo PMC Catalogs 86, 87, and 88. The Part I of the catalog contains the positions of 1080 basic FK5 stars, 210 FK4 Suppl. stars, 1700 AGK3R stars, 131 OB stars, 36 NPZT stars, and 96 SAO stars, observed with the Tokyo PMC in the 1989 period based on FK5 system. The Part II of the catalog contains the positions of 210 zodiacal stars observed with the Tokyo PMC in the 1989 period based on the FK5 system. The stars of the Part II are usable for the reduction of lunar occultation. The Parts I and II are concatenated to form a single machine-readable catalog.
643. Tokyo Photoelectric Meridian Circle Catalog 1987
ID:
ivo://CDS.VizieR/I/187
Title:
Tokyo Photoelectric Meridian Circle Catalog 1987
Short Name:
I/187
Date:
21 Oct 2021
Publisher:
CDS
Description:
The third annual catalog of the Tokyo PMC is presented for 5748 stars which had been observed at least two times in the year 1987 period, that is, from January 1, 1987, to December 31, 1987. The positions of the stars given in the catalog are those at the mean epoch of observations. The coordinates of the catalog are referred to the equinox and equator of J2000.0, based on the FK5 system. The mean trends of the observed positions minus FK5 positions for the FK5 basics stars are constructed and compared with those of the Tokyo PMC 86 catalog. The part I of the catalog contains the positions of 1017 FK5 basics (=FK4 stars ), 533 FK4 Suppl. stars, 2421 AGK3R stars, 1167 OB stars, 113 NPZT stars, and 84 SAO stars, and the part II of the catalog contains the positions of 413 SAO stars for occultation studies. These two parts were merged into a single pmc87 file.
644. Tokyo Photoelectric Meridian Circle Catalog 1985
ID:
ivo://CDS.VizieR/I/186
Title:
Tokyo Photoelectric Meridian Circle Catalog 1985
Short Name:
I/186
Date:
21 Oct 2021
Publisher:
CDS
Description:
The catalog of positions of 1007 stars (792 FK4 and FK4S stars, 57 OB stars, 49 NPZT stars, and 109 SAO stars) is presented. They were observed during the period from December 1984 to September 1985 with the Tokyo Photoelectric Meridian Circle (Tokyo PMC). The positions in the catalog are referred to the equinox and equator of J2000, and are based on the FK4 system. The internal errors of a single observation were estimated to be (epsilon(alpha)*cos(delta), epsilon(delta)) = (0.16", 0.19"), whereas the mean internal errors of the catalog positions were (0.08", 0.08") for FK4 stars and (0.09", 0.11") for FK4S stars. The comparison of the positions of the FK4 stars in the present catalog with those of the FK4 catalog shows the significant differences delta(alpha(delta)) and delta(delta(delta)) in some declination zones. Some of those differences are commonly found in other recent catalogs. Thus they may be considered to be the real systematic errors in the FK4 system. Neither significant magnitude nor color equation exists in the Tokyo PMC85 catalog.
645. Topocentric positions of Pluto
ID:
ivo://CDS.VizieR/VI/155
Title:
Topocentric positions of Pluto
Short Name:
VI/155
Date:
22 Feb 2022
Publisher:
CDS
Description:
Catalog of 90 astrometric positions of Pluto have been compiled with Tycho-2 as a reference frame from photographic observations obtained at the Main Astronomical Observatory, National Academy of Sciences of Ukraine, Astronomical Observatory of the Kyiv Shevchenko National University, Research Institute Mykolaiv Astronomical Observatory and Baldone Observatory of the University of Latvia in 1961-1996. Astronegatives have been digitized with Epson Perfection V750 Pro and Epson Expression 10000XL commercial scanners in 16-bit grayscale with a resolution of 1200 dpi. (O-C) residuals obtained from the comparison with JPL PLU055/DE433 ephemeris are 0.09 ... 0.14 arcsec. Gallery of plate images used for catalog: http://gua.db.ukr-vo.org/catalog_gallery.php?catn=pluton_1961_1996
646. Topocentric positions of Saturn's moons
ID:
ivo://CDS.VizieR/J/other/KFNT/33.70
Title:
Topocentric positions of Saturn's moons
Short Name:
J/other/KFNT/33.
Date:
21 Oct 2021
Publisher:
CDS
Description:
A catalog of 1399 astrometric positions of Saturn's moons S2-S9 has been compiled with Tycho-2 as a reference frame from photographic observations obtained at the Main Astronomical Observatory, National Academy of Sciences of Ukraine, in 1961-1990. Astronegatives have been digitized with an Epson Expression 10000XL commercial scanner in 16-bit grayscale with a resolution of 1200 dpi. Reduction has been performed in the LINUX-MIDAS-ROMAFOT software supplemented with additional modules. The internal positional accuracy of the reduction is 0.09...0.23" for both coordinates and 0.27...0.37m for the photographic magnitudes of the Tycho-2 catalog. Gallery of plate images used for the catalog: http://gua.db.ukr-vo.org/catalog_gallery.php?catn=satmoons_1961_1990
647. Toulouse AC Zone Data Reduced to ACRS
ID:
ivo://CDS.VizieR/I/232
Title:
Toulouse AC Zone Data Reduced to ACRS
Short Name:
I/232
Date:
21 Oct 2021
Publisher:
CDS
Description:
The U.S. Naval Observatory is in the process of making new reductions of the Astrographic Catalogue (AC) using a modern reference system, the ACRS, which represents the system of the FK5. The data from the Toulouse Zone, whose plates are centered between declinations +5 and +11 degrees (eq. 1900), have been analyzed for scale, rotation, tilt, coma, magnitude equation, radial distortion and distortions introduced by the use of reseaux in the Carte du Ciel program. The result is a positional catalog of almost 270,000 stars on eq. J2000.0, epoch of observation. Additionally, all stars have been matched with the Tycho Input Catalog (revised); those numbers have been added for additional identification purposes.
648. Triton stellar occultation candidates
ID:
ivo://CDS.VizieR/J/AJ/119/936
Title:
Triton stellar occultation candidates
Short Name:
J/AJ/119/936
Date:
21 Oct 2021
Publisher:
CDS
Description:
As part of our ongoing program of predictions and observations of stellar occultations by solar system bodies, we have completed a search for candidates for occultations by Triton over the decade 2000 to 2009. Star positions near Triton's projected orbit as determined by the DE405 ephemeris and NEP016 orbit model were measured on (unfiltered) CCD strip scans recorded with the 0.6 m telescope at the George R. Wallace Astrophysical Observatory to a depth of 16th to 18th magnitude, depending on the quality of individual strip scans. Within 1.0" of the predicted orbit of Triton during this period, 128 stars were found, including 12 stars brighter than 14th magnitude. Only appulses with geocentric minimum separations of less than about 0.37" will result in an occultation visible from Earth, but potential errors in the ephemeris and in the positions of our candidates preclude accurate prediction of actual occultation events without further astrometry.
649. Triton stellar occultation candidates
ID:
ivo://CDS.VizieR/J/AJ/109/1352
Title:
Triton stellar occultation candidates
Short Name:
J/AJ/109/1352
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have completed a search for candidates for stellar occultations by Triton over the years 1995-1999 CCD strip scan images provided star positions in the relevant sky area to a depth of about 17.5Rmag. Over this time period, we find that Triton passes within 1.0arcsec of 75 stars. Appulses with geocentric minimum separations of less than 0.35arcsec will result in stellar occultations, but further astrometry and photometry is necessary to refine individual predictions for identification of actual occultations. Finder charts are included to aid in further studies and prediction refinement. The two most promising potential occultations, Tr176 and Tr180, occur in 1997.
650. Triton stellar occultation candidates
ID:
ivo://CDS.VizieR/J/AJ/104/862
Title:
Triton stellar occultation candidates
Short Name:
J/AJ/104/862
Date:
21 Oct 2021
Publisher:
CDS
Description:
A search for Triton stellar occultation candidates for the period 1992-1994 has been completed with CCD strip-scanning observations. The search reached an R magnitude of about 17.4 and found 129 candidates within 1.5arcsec of Triton's ephemeris during this period. Of these events, we expect around 30 occultations to be visible from the Earth, indicating that a number of Triton occultation events should be visible from major observatories. Even the faintest of our candidate events could produce useful occultation data if observed with a large enough telescope. Our astrometric accuracy is inadequate to identify which of these appulse events will produce occultations on the Earth; further astrometry is needed to refine the predictions for positive occultation identification. To aid in selecting candidates for additional astrometric and photometric studies, we include finder charts and Earth-based visibility charts for each event.

Limit your search

more »

more »