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651. 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.
652. Tokyo Photoelectric Meridian Circle Catalog 1986
ID:
ivo://CDS.VizieR/I/167
Title:
Tokyo Photoelectric Meridian Circle Catalog 1986
Short Name:
I/167
Date:
21 Oct 2021
Publisher:
CDS
Description:
The second annual catalog of the Tokyo Photoelectric Meridian Circle contains 3974 stars that were observed at least twice between 21 December 1985 and 31 December 1986. Specifically, it contains 1141 FK5 stars, 971 FK4 supplemental stars, 554 AGK3R stars, 403 OB stars, 421 NPZT stars, and 484 SAO stars. The positions are for the mean epoch of observation referred to the equinox and equator of J2000.0 and based on the FK5 system. The internal error of a single observation for the bright stars is 0.24" and 0.27" in right ascension and declination, respectively. The catalog contains, in addition to the positions, the catalog from which the star is taken and the number in that catalog, the mean epoch and number of observations of each component of the position and of the magnitude, the spectral type, the V magnitude, and the DM and AGK3 numbers. It also contains the residuals between the position in this catalog and that in the source catalog and mean errors for each component of the position and of the magnitude.
653. Tokyo Photoelectric Meridian Circle Catalog 90-93
ID:
ivo://CDS.VizieR/I/248
Title:
Tokyo Photoelectric Meridian Circle Catalog 90-93
Short Name:
I/248
Date:
21 Oct 2021
Publisher:
CDS
Description:
The sixth annual catalog of the Tokyo PMC is presented for 6649 stars which were observed at least two times in January 1990 through March 1993. The mean positions of the stars observed in the above period are given in the catalog at the corresponding mean epochs of observations of individual stars. The coordinates of the catalog are based on the FK5 system, and referred to the equinox and equator of J2000.0. The mean local deviations of the observed positions from the FK5 catalog positions are constructed for the basic FK5 stars to compare with those of the Tokyo PMC Catalog 89 and preliminary Hipparcos results of H30. The catalog contains the positions of 1180 basic FK5 stars, 322 FK4 Suppl. stars, 3132 AGK3R stars, 141 OB stars, 252 NPZT stars, and 1601 SAO stars observed with the Tokyo Photoelectric Meridian Circle in the 1990 to 1993 periods based on the FK5 system. The positions of the stars are given for the mean epoch of the observations of individual stars referring 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.
654. 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
655. 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
656. 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.
657. 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.
658. 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.
659. 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.
660. Tycho Input Catalogue, Revised version
ID:
ivo://CDS.VizieR/I/197A
Title:
Tycho Input Catalogue, Revised version
Short Name:
I/197A
Date:
21 Oct 2021
Publisher:
CDS
Description:
A Tycho Input Catalogue of three million stars brighter than V=12.1 has been prepared, for the needs of the Tycho mission (Hipparcos satellite). This catalogue results from the cross-matching of a subset of the Hubble Space Telescope Guide Star Catalog with the Hipparcos INCA database. References to these major catalogues, and details about the cross-matching procedures are to be found in the paper published in Astron. Astrophys. 258, 217-222 (May 1992). Among the 3,154,204 stars of the Tycho Input Catalogue, only a bit more than 1 million will appear in the final Tycho catalogue. A preliminary selection was done in the Recognition process, that was based on the first year of the satellite scientific mission (Halbwachs et al., =1994A&A...281L..25H). 1,049,971 stars were thus selected, and are flagged in this version of the Tycho Input Catalogue. The main file contains 3 154 204 records of 80 characters (total size: 256 Mbytes). It is split into four files tic1 to tic4 for easier manipulations. An annex file contains the following additional data for a subset of the stars: (a) the cross-identification with the Hipparcos Input Catalogue (117 778 records, flag 26) (b) the cross-matching with the INCA database (217 625 records, flag 20). The annex file contains 217 625 records (64 char., 14 Mbytes).

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