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NGC 2587



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CCD-Based Astrometric Measurement of Photographic Plates
We have developed a methodology for the astrometric measurement ofphotographic plates making use of a CCD camera. In order to measure acomplete 2°x 2° plate a mosaic of 8×8 frames with 50% overlap inboth coordinates was taken. The detection and centering of stellarimages was performed with SExtractor, and by means of our own softwaretriple exposures were identified. A noticeable radial distortionproduced by the optical system was found and corrected. The reduction tocelestial coordinates was performed by means of the block-adjustmenttechnique, using Tycho-2 as reference catalog. Differences with Tycho-2suggest that the errors of CCD-based positions obtained from the CdCplate are between 0. and 0.. Completeness of the catalogs obtained isalso discussed.

Uniform survey of clusters in the southern Milky Way.
Abstract image available at:http://adsabs.harvard.edu/abs/1975AJ.....80...11V

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Observation and Astrometry data

Right ascension:08h23m30.00s
Apparent magnitude:9

Catalogs and designations:
Proper Names   (Edit)
NGC 2000.0NGC 2587

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