Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985msngr..42....4t&link_type=abstract
ESO Messenger (ISSN 0722-6691), Dec. 1985, p. 4-6.
Astronomy and Astrophysics
Astronomy
6
Astronomical Photometry, Globular Clusters, Planetary Nebulae, Sagittarius Constellation, X Ray Sources, Clouds, Galactic Nuclei, Open Clusters, Sky Surveys (Astronomy), Spiral Galaxies
Scientific paper
In 1976, a photometric study of the bright cloud B in Sagittarius was initiated. The investigation included a systematic survey of a large number of U, B, V, and R plates obtained with the aid of a 1 m Schmidt telescope. In addition, photometric measurements were conducted of several hundred stars. Up to now, 24 diffuse objects have been detected, three of which are planetary nebulae, while two are possible globular clusters. One is a possible galactic open cluster. Forty-two proper-motion stars and 621 red variable stars were also discovered. Current research is mainly concerned with field No. 1, which is located northeast of 45 Oph. Seventeen new diffuse objects were found during an analysis of the two first pairs of R plates and one pair of B plates. Data regarding these new diffuse objects are presented in a table, taking into account galactic and equatorial coordinates and their X; Y positions on the Palomar Observatory Sky Survey.
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