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421. San Fernando AC Zone Data Reduced to ACRS
ID:
ivo://CDS.VizieR/I/222
Title:
San Fernando AC Zone Data Reduced to ACRS
Short Name:
I/222
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 San Fernando Zone, whose plates are centered between declinations -3 and -9 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 over 225,000 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.
422. Santiago catalogue of 1105 FK5 stars
ID:
ivo://CDS.VizieR/J/A+AS/95/355
Title:
Santiago catalogue of 1105 FK5 stars
Short Name:
J/A+AS/95/355
Date:
21 Oct 2021
Publisher:
CDS
Description:
The positions in right ascension and declination of 1105 FK5 stars, observed with a Meridian Circle during the period 1979 to 1991, are given. The average mean square error of a position, for the whole catalog, is +/-0.009s in right ascension and +/-0.10arcsec in declination. The mean epoch of the catalog is 1983.148.
423. SANTIAGO 91, RA catalogue
ID:
ivo://CDS.VizieR/J/A+AS/109/501
Title:
SANTIAGO 91, RA catalogue
Short Name:
J/A+AS/109/501
Date:
21 Oct 2021
Publisher:
CDS
Description:
The positions in right ascension of 3387 stars belonging to the Santiago 67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan, National Astronomical Observatory, during the period 1989 to 1994, are given. The average mean square error of a position, for the whole Catalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.
424. SAO Star Catalog J2000
ID:
ivo://CDS.VizieR/I/131A
Title:
SAO Star Catalog J2000
Short Name:
I/131A
Date:
21 Oct 2021
Publisher:
CDS
Description:
This machine-readable SAO catalog from the Astronomical Data Center is based on an original binary version of the Smithsonian Astrophysical Observatory Star Catalog (SAO, SAO Staff 1966). Subsequent improvements by T. A. Nagy (1979) included the addition of equatorial coordinates in radians and cross-identifications from the Table of Correspondences SAO/HD/DM/GC (Morin 1973). As a prelude to creation of the 1984 version of the SAO, a new version of the SAO-HD-GC-DM Cross Index was prepared (Roman, Warren, and Schofield 1983). The 1984 version of the SAO contained the corrected and extended cross identifications, all errata published up to January 1984 and known to the ADC, numerous errors forwarded to the ADC by colleagues, and errors discovered at the ADC during the course of this work. Clayton A. Smith of the U. S. Naval Observatory provided J2000.0 positions and proper motions for the SAO stars. Published and unpublished errors discovered in the previous version (1984) have been corrected (up to May 1991). The catalog contains SAO number; the right ascension and declination with a B1950.0 equinox and epoch; annual proper motion and its standard deviation, photographic and visual magnitudes; spectral type; references to sources; the Durchmusterung (DM) identifier if the star is listed in the Bonner DM (BD), Cordoba DM (CD), or Cape Photographic DM (CP); component identification; The Henry Draper (Extension) (HD or HDE) number; and J2000 positions and proper motions. Multiple-star component identifications have been added to stars where more than one SAO entry has the same DM number. The Henry Draper Extension (HDE) numbers have been added for stars found in both volumes of the extension. Data for duplicate SAO entries (those referring to the same star) have been flagged. J2000 positions in usual units and in radians have been added.
425. Saturnian satellites Cassini ISS astrometry
ID:
ivo://CDS.VizieR/J/A+A/610/A2
Title:
Saturnian satellites Cassini ISS astrometry
Short Name:
J/A+A/610/A2
Date:
21 Oct 2021
Publisher:
CDS
Description:
Caviar is a software package designed for the astrometric measurement of natural satellite positions in images taken using the Imaging Science Subsystem (ISS) of the Cassini spacecraft. We provide new astrometric positions for selected major satellites of Saturn, 2013-2016.
426. Saturnian satellites Cassini ISS astrometry
ID:
ivo://CDS.VizieR/J/A+A/572/A43
Title:
Saturnian satellites Cassini ISS astrometry
Short Name:
J/A+A/572/A43
Date:
21 Oct 2021
Publisher:
CDS
Description:
We provide astrometric observations of the Saturnian satellites Mimas, Enceladus, Tethys, Dione and Rhea from Cassini Imaging Science Subsystem (ISS) narrow-angle camera (NAC) images. Image sequences were designed to observe mutual occultations between these satellites.
427. Saturnian satellites in the Gaia ref. frame
ID:
ivo://CDS.VizieR/J/A+A/645/A76
Title:
Saturnian satellites in the Gaia ref. frame
Short Name:
J/A+A/645/A76
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present a remeasurement of old photographic plates, providing important raw data for dynamical studies of the Saturnian satellite system. The unprecedentedly accurate realization of the Gaia reference frame allows us to make a precise calibration of digitized astronegatives of the Saturnian satellite images. We reprocessed 357 astronegatives taken with the 26-inch refractor and the normal astrograph of the Pulkovo Observatory between 1972 and 2007 to obtain the positions of the main Saturnian moons in the second Gaia data release (Gaia DR2) system. Photographic plates were digitized with the Pulkovo Mobile Digitizing Device (MDD) scanner. The New Astrometric Reduction of Old Observations (NAROO) digitizer at the Paris Observatory was used to calibrate the scanned images. Satellite image centering and astrometric reduction were performed. In total, 6487 positions (equatorial coordinates) have been determined with an accuracy of 50mas. This is confirmed by a comparison of our data with modern ephemerides. The verification of the results was performed using data from past close approaches by Saturnian satellites to Gaia reference stars, showing the adequacy of the current residual analysis. A joint review of the Pulkovo and the United States Naval Observatory (USNO) intersatellite positions allows us to conclude about the existence of faint systematic effects in the satellite theories of motions at the 10mas level.
428. Search for UMa group companions
ID:
ivo://CDS.VizieR/J/A+A/591/A84
Title:
Search for UMa group companions
Short Name:
J/A+A/591/A84
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present the results of a survey to detect low-mass companions of Ursa Major (UMa) group members, carried out in 2003-2006 with NACO at the ESO VLT. While many extra-solar planets and planetary candidates have been found in close orbits around stars by the radial velocity and the transit methods, direct detections at wider orbits are rare. The UMa group, a young nearby stellar association at an age of about 200-600Myr, has not yet been addressed as a whole although its members represent a very interesting sample to search for and characterize substellar companions by direct imaging. Our goal was to find or to provide detection limits on wide substellar companions around nearby UMa group members using high-resolution imaging. We searched for faint companions around 20 UMa group members within 30pc. The primaries were placed below a semi-transparent coronagraph, a rarely used mode of NACO, to increase the dynamic range of the images. In most cases, second epoch images of companion candidates were taken to check whether they share common proper motion with the primary.
429. Second Cape Photographic Catalogue (CPC2)
ID:
ivo://CDS.VizieR/I/265
Title:
Second Cape Photographic Catalogue (CPC2)
Short Name:
I/265
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Second Cape Photographic Catalogue (CPC2) is an astrometric, photographic catalog covering the entire Southern Hemisphere to a limiting magnitude of about 10.5. The Hipparcos Catalogue has been used for a new, plate-by-plate, rigorous reduction. A significant improvement over the release 1 version of the data was achieved. With an average accuracy of 53 mas and a mean epoch of 1968, the CPC2 is a key catalog for proper-motion determination. This release 2 of the CPC2 contains high-quality positions of 266629 stars and an appendix of 8040 other stars. Catalog reduction and construction details are given, as well as a description of the final product, which is available from the US Naval Observatory.
430. Second Cat of Fundamental Stars (SPF2)
ID:
ivo://CDS.VizieR/I/44
Title:
Second Cat of Fundamental Stars (SPF2)
Short Name:
I/44
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Catalogue SPF2 was obtained from observations of the fundamental FK4 stars as a reference stars for SRS, BS and DS star. Observations were made by Pulkovo observers in the declination zone -42 to -90 and +16 to -16 degrees using Repsold Meridian Circle of the Cerro Calan Observatory (Santiago, Chile) from 1963 to 1968.

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