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GPM - compiled catalogue of absolute proper motions of stars in selected areas of sky with galaxies.
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| GPM1 - a catalog of absolute proper motions of stars with respect to galaxies
The description of the first version of the General Compiled Catalogueof Absolute Proper Motions (GPM1) for a sample of HIPPARCOS stars,derived with respect to galaxies within the plan called Catalogue ofFaint Stars (KSZ, Deutch 1952), is presented. The principal aim of theGPM1 construction was to provide absolute proper motions of stars todetermine the rotation of the HIPPARCOS system. The GPM1 cataloguecontains 977 HIPPARCOS Input Catalogue stars with V magnitudes $5^m -11^m in 180 fields north of -25 degrees of declination. The accuracy ofthe proper motions is 8 mas/yr (milliarcseconds per year). Comparison ofproper motions of GPM1 with those of the PPM and ACRS was performed andanalyzed with respect to systematic errors caused by spurious rotationof the FK5 system. The standard errors show that the rotation may bedetermined with an accuracy better than 1 mas/yr. Catalog is onlyavailable in electronic form at the CDS via anonymous ftpcdsarc.u-strasbg.fr or ftp 130.79.128.5.
| A photometric study of M104
Surface photometry in UBVRI is presented for the galaxy M104 (NGC 4594).Galaxy luminosity is represented by an ellipsoid described by a modifiedHubble law with a ratio of minor to major axis b/a constant (b/a =0.639) from the nucleus to the inner edge of the dust lane (a isapproximately 160 arcsec) and increasing to b/a = 1 at 500 arcsec. Theunderlying disk structure was found to be similar to other galaxy disks;it does not continue to the nucleus. Fitting parameters for the disk andellipsoid are presented, and it is found that the colors for the twosystems are nearly equal and very uniform. Nuclear image modificationrevealed a galaxy nuclear core possessing a minor-axis core radius of0.83 arcsec. Magnitude and color profiles of the nucleus and dust laneare given, and no absorption by dust is evident within b = 5 arcsec. Theintegrated magnitude of the galaxy to a = 1200 arcsec (B = 27.8 mag/sqarcsec) is B = 8.71. To a = 500 arcsec, where the galaxy image becomescircular, the disk contributes 10 percent of the B light. Assuming adistance of 18.2 Mpc and an extinction correction of 0.12 mag, theabsolute magnitude of the galaxy is -22.71 and the absolute magnitude ofthe disk is -19.93.
| UBV photoelectric study of NGC 3379, 3384, 3389.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974AJ.....79..835B&db_key=AST
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Datos observacionales y astrométricos
| Constelación: | Leo |
| Ascensión Recta: | 10h46m19.32s |
| Declinación: | +12°44'52.2" |
| Magnitud Aparente: | 6.913 |
| Distancia: | 125 parsecs |
| Movimiento Propio en Ascensión Recta: | -2 |
| Movimiento Propio en Declinación: | -30.9 |
| B-T magnitude: | 7.043 |
| V-T magnitude: | 6.924 |
Catálogos y designaciones:
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