- ID:
- ivo://padc.obspm.planeto/basecom/q/epn_core
- Title:
- The Nançay Cometary Database
- Short Name:
- basecom.epn_core
- Date:
- 02 May 2024 18:54:10
- Publisher:
- Paris Astronomical Data Centre
- Description:
- Since 1973, the 18-cm lines of the OH radical have been systematically observed in a number of comets with the Nançay radio telescope. This allowed an evaluation of the cometary water production rates and their evolution with time, as well as a study of several physical processes: the excitation mechanisms of the OH radio lines, the expansion of the cometary atmospheres, their anisotropy in relation with non-gravitational forces, the Zeeman effect in relation with the cometary magnetic field. The Nançay observations of 53 cometary apparitions between 1982 and 2009 are now organized in this database.
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- ID:
- ivo://ned.ipac/NED
- Title:
- The NASA/IPAC Extragalactic Database
- Short Name:
- NED
- Date:
- 10 Jun 2021 18:18:18
- Publisher:
- NASA/IPAC
- Description:
- The NASA/IPAC Extragalactic Database (NED) provides a comprehensive fusion of multi-wavelength data for hundreds of millions of objects located beyond the Milky Way galaxy. As new observations are published in NASA mission archives, journal articles and sky survey catalogs, they are cross-identified with prior measurements and integrated in a unified database. Numerous derived quantities are also provided to facilitate scientific research. For more information see http://ned.ipac.caltech.edu/
- ID:
- ivo://fs.usno/org
- Title:
- United States Naval Observatory, Flagstaff Station
- Short Name:
- USNOFS
- Date:
- 11 Apr 2007 08:52:38
- Publisher:
- US Naval Observatory
- Description:
- The USNO Flagstaff Station Image and Catalogue archive provides access to digitized images of the major Schmidt photographic surveys of the sky (POSS-I, POSS-II, SERC-J, SERC-R, SERC-EJ, SERC-ER, AAO-R etc.) and to astrometric catalogues derived from these data, including USNO-A2, USNO-B1 and NOMAD. The site provides catalogue data, finding charts, image data and a merge of the three.
- ID:
- ivo://fs.usno
- Title:
- United States Naval Observatory, Flagstaff Station Naming Authority
- Short Name:
- USNOFS auth
- Date:
- 11 Apr 2007 08:52:38
- Publisher:
- US Naval Observatory
- Description:
- The USNO Flagstaff Station Image and Catalogue archive provides access to digitized images of the major Schmidt photographic surveys of the sky (POSS-I, POSS-II, SERC-J, SERC-R, SERC-EJ, SERC-ER, AAO-R etc.) and to astrometric catalogues derived from these data, including USNO-A2, USNO-B1 and NOMAD. The site provides catalogue data, finding charts, image data and a merge of the three.
35. USGS_WMS
- ID:
- ivo://padc.obspm.planeto/usgs_wms/q/epn_core
- Title:
- USGS_WMS
- Short Name:
- usgs_wms.epn_cor
- Date:
- 17 Apr 2024 13:28:42
- Publisher:
- Paris Astronomical Data Centre - Constructor University
- Description:
- Catalogue of USGS Astrogeology WMS Map Layers
- ID:
- ivo://fs.usno/cat/usnoa2
- Title:
- USNO-A2 Catalogue
- Short Name:
- USNO-A2
- Date:
- 03 Feb 2020 22:20:44
- Publisher:
- United States Naval Observatory, Flagstaff Station
- Description:
- USNO-A2.0 is a catalog of 526,280,881 stars, and is based on a re-reduction of the Precision Measuring Machine (PMM) scans that were the basis for the USNO-A1.0 catalog. The major difference between A2.0 and A1.0 is that A1.0 used the Guide Star Catalog (Lasker et al. 1986, see Cat. <I/220>) as its reference frame whereas A2.0 uses the ICRF as realized by the USNO ACT catalog (Urban et al. 1997, see Cat. II/246>). A2.0 presents right ascension and declination (J2000, epoch of the mean of the blue and red plate) and the blue and red magnitude for each star. Usage of the ACT catalog as well as usage of new astrometric and photometric reduction algorithms should provide improved astrometry (mostly in the reduction of systematic errors) and improved photometry (because the brightest stars on each plate had B and V magnitudes measured by the Tycho experiment on the Hipparcos satellite). The basic format of the catalog and its compilation is the same as for A1.0, and most users should be able to migrate to this newer version with minimal effort. (1 data file).
- ID:
- ivo://fs.usno/cat/usnob
- Title:
- USNO-B1 Catalogue
- Short Name:
- USNO-B1
- Date:
- 03 Feb 2020 22:21:11
- Publisher:
- United States Naval Observatory, Flagstaff Station
- Description:
- USNO-B is an all-sky catalog that presents positions, proper motions, magnitudes in various optical passbands, and star/galaxy estimators for 1,042,618,261 objects derived from 3,643,201,733 separate observations. The data were obtained from scans of 7435 Schmidt plates taken for the various sky surveys during the last 50 years. USNO-B1.0 is believed to provide all-sky coverage, completeness down to V=21, 0.2" astrometric accuracy at J2000, 0.3 mag photometric accuracy in up to five colors, and 85% accuracy for distinguishing stars from nonstellar objects. A brief discussion of various issues is given here, but the actual data are available from the US Naval Observatory Web site and others.
38. vcd
- ID:
- ivo://lmd.jussieu/vcd/q/epn_core
- Title:
- vcd
- Date:
- 19 Apr 2024 00:05:16
- Publisher:
- Laboratoire Méteorologie Dynamique
- Description:
- The database contains some outputs of the VCD for the scenarios : {1) Standard cloud albedo Scenario, solar EUV average conditions ; 2) Standard cloud albedo Scenario, solar EUV minimum conditions ; 3) Standard cloud albedo Scenario, solar EUV maximum conditions ; 4) Low cloud albedo Scenario, solar EUV average conditions ; 5) High cloud albedo Scenario, solar EUV average conditions available}, at different positions of latitude and longitude. These VCD outputs are provided as Votables containing profiles of temperatures, pressures, density and abundances of main species for altitudes between 0 and 349.5 km from the surface.
- ID:
- ivo://padc.obspm.planeto/meteor_showers/q/epn_core
- Title:
- VOEvent meteor shower service
- Short Name:
- Meteor Showers
- Date:
- 08 Mar 2023 13:09:31
- Publisher:
- Paris Astronomical Data Centre
- Description:
- The ephemeris were produced by simulating the ejection of meteoroids from the sunlit hemisphere of cometary nuclei, typically from 0 to 3 au, followed by the propagation of orbits of meteoroids in the Solar System, taking into account the gravity of the Sun, the 8 planets, Pluto, and the Moon, as well as the radiation pressure and the Poynting-Robertson drag. Note that asteroid parent bodies were considered as active (i.e. comet-like bodies) even if they are not active today. The showers are predicted when a planet enters a large enough set of meteoroids, at a distance less than typically 0.01 au. See Vaubaillon J., Colas F., Jorda L. 2005 A new method to predict meteor showers. I. Description of the model, Astronomy and Astrophysics, Volume 439/2 p.751-760, as well as: Vaubaillon J. 2017 A confidence index for forecasting of meteor showers, Planetary and Space Science, Volume 143 p.78-82
- ID:
- ivo://src.pas/rwcalerts/q/collection
- Title:
- VOEvent solar prediction service in vespa
- Date:
- 09 Jan 2023 23:10:15
- Publisher:
- Space Research Centre of Polish Academy of Sciences
- Description:
- Events from Forecast of Solar-geophysical activity and propagation conditions [Solar-geophysical prediction service RWC Warsaw SRC PAS]