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The field of IC 2602: Strömgren-Hβ photometry approach
A homogeneous data-base collating all uvbyβ photometry available atpresent for O-B9 stars in the field of IC 2602 is presented. Thecharacteristics of the field are studied. Four spatially coherent groupscan be distinguished. A low reddened compact group located at156±6 pc is identified with IC 2602, followed by backgroundlayers at 546±33 pc, 1117±61 pc, and possibly at2626±163 pc. The apparent depth of the first three layers isabout 1 kpc, which is consistent with the thickness of a spiral arm.There is an indication for the existence of a region free of massiveluminous stars between 1.2 and 2.6 kpc, which could be associated withinterarm space between the Local Association and the distant spiralstructures toward Carina. A comparison between the photometric andHipparcos parallaxes is presented.
| Strömgren and Hβ photometry of O and B type stars in star-forming regions. III. Carina Spiral Feature
Strömgren and Hβ photometry of O and B type stars, generallybrighter than 9.5 mag is reported for the field of the Carina SpiralFeature. The observations are based on the PPM catalogue identificationsand are designed to improve the completeness of the existing uvbybetadata for the bright early-type stars in the field. We present new uvbyphotometry for 283 stars and Hβ photometry for 225 of them. Theseobservations are part of an ongoing effort to study the structure ofselected star-forming regions in the Milky Way by means of uvbybetaphotometry. A comparison of the new data to other uvbybeta data sets forthis field is presented. Based on data from the Strömgren AutomaticTelescope of the Copenhagen University Observatory, La Silla. Tables 1and 2 are only available in electronic form at the CDS via anonymous ftpto 130.79.128.5 or via http://cdsweb.u-strasbg.fr/Abstract.html
| The galactic cluster IC 2602 (Errata: 17 310)
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Observation and Astrometry data
| Constellation: | Kiel des Schiffs |
| Right ascension: | 10h33m34.97s |
| Declination: | -65°02'28.4" |
| Apparent magnitude: | 8.956 |
| Distance: | 442.478 parsecs |
| Proper motion RA: | -10.1 |
| Proper motion Dec: | 3.7 |
| B-T magnitude: | 9.163 |
| V-T magnitude: | 8.974 |
Catalogs and designations:
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INHABITED SKY
