Search

Start Over Subject astrometry Content Level Research
471. RV measurements of eight spectroscopic binaries
ID:
ivo://CDS.VizieR/J/AN/338/671
Title:
RV measurements of eight spectroscopic binaries
Short Name:
J/AN/338/671
Date:
21 Oct 2021
Publisher:
CDS
Description:
Since early 2015 a new radial velocity monitoring campaign is going on at the University Observatory Jena. The aim of this project is to obtain current radial velocity measurements of selected single-lined spectroscopic binary systems, to re-determine and/or constrain their orbital solutions.
472. 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.
473. 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.
474. 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.
475. 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.
476. 1995 Saturnian satellite observations
ID:
ivo://CDS.VizieR/J/A+A/380/727
Title:
1995 Saturnian satellite observations
Short Name:
J/A+A/380/727
Date:
21 Oct 2021
Publisher:
CDS
Description:
This paper provides an analysis of astrometric measurements of the main Saturnian satellites made thanks to CCD observations performed in 1995 at the Laboratorio Nacional de Astrofisica at Itajuba in Brazil. The astrometric reduction is discussed, especially the small corrections done here, but most of time neglected elsewhere. A catalog of 6006 differential positions has been obtained. They have been compared to different ephemerides, the Vienne & Duriez ephemerides (TASS 1.7, 1995A&A...297..588V, 1997 Cat. <J/A+A/324/366>), the Harper & Taylor (1994A&A...284..619H) ephemerides and the Dourneau (1993A&A...267..292D) ephemerides. These observations provide a large set of modern observations, and appear to be of good precision. This accuracy is needed for future use of these data to improve the dynamical models. These positions are included in the data base NSDC dedicated to the natural satellites (ftp://ftp.bdl.fr/pub/NSDC/saturn/raw_data/position/).
477. 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.
478. 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.
479. 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.
480. 1995 Saturnian satellites mutual events
ID:
ivo://CDS.VizieR/J/A+AS/139/47
Title:
1995 Saturnian satellites mutual events
Short Name:
J/A+AS/139/47
Date:
21 Oct 2021
Publisher:
CDS
Description:
The files contain the results of Photometry and Position Observations of Saturnian Satellites. Some file presents a specific data of each measurement. Common parameters of observations such as the initial moment are given in the article.