|
|
| Internet |
| Catálogos Astronômicos |
-
-
|
| GSC II |
The Guide Star Catalog II (GSC II) is an all-sky catalog based on 1" resolution scans of the photographic
Sky Survey plates, at two epochs and three bandpasses, from the Palomar and UK Schmidt telescopes
(DSS). The all-sky, magnitude-limited
Telescope Operations version, GSC2.2, contains positions, classifications, and magnitudes for 435,457,355 objects,
and is now available to
the community via the WWW. |
| GSC 1 |
The Guide Star Catalog I (GSC I) is an all-sky optical catalog of positions and magnitudes of approximately
19 million stars and other objects in the 6th to 15th magnitude range. GSC I catalog is used for the control and
target acquisition of the Hubble Space Telesope.
|
|
| USNO |
|
| USNO-B 1.0 |
USNO-B1.0 is the latest catalogue from the USNOFS PMM project. It contains over 1,000,000,000
entries and has positions, magnitudes and proper motions for each object. The catalogue is over
80 GBytes in size; because of its large size, we do not currently have plans to print copies for
distribution. As computer media evolve, this may change. At this time, data from this catalogue can
be obtained from the USNO Image and
Catalogue Server. |
| USNO-A 2.0 |
USNO-A2.0 contains entries for over a half billion stars (526,230,881, to be exact!) which were
detected in the digitized images of three photographic sky surveys. For the entire northern sky and
the southern sky down to declinations of -30°, all the photographic plates were part of the original
Palomar Optical Sky Survey (POSS-I). Photographs were taken on blue- and red-sensitive emulsions.
Only those stars which were detected in both colors were included in the USNO-A2.0 catalog. The rest
of the southern sky was covered by the Science Research Council (SRC)-J survey and the European Southern
Observatory (ESO)-R survey. Again, only stars appearing in both colors were accepted for the final catalogue. |
| USNO-SA 2.0 |
USNO-SA2.0 is a subset of USNO-A2.0 which is a lot easier to handle on a small computer because it
contains only a tenth as many stars as the parent catalog (54,787,624 stars in all). The goal in creating
this smaller catalog was to provide a spatially uniform distribution of stars in an intermediate range of
magnitudes which would be useful as a ``reference grid'' for astrometric analysis. |
| USNO UCAC |
The USNO CCD Astrograph Catalog (UCAC) is an ongoing, astrometric, observational program, which started
in early 1998 and will probably finished in 2003. The goal is to compile a precise star catalogue for fainter
stars, extending the precise reference frame provided by the ESA Hipparcos and Tycho catalogues down to 16mag.
The catalogue will also include proper motions, and the positions of the reference stars will be accurate to
about 0.02" for brighter stars (10mag to 14mag), and a precision of about 0.07" is expected at the limiting
magnitude of 16mag. |
|
|
|
