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The distribution of OB stars and dust in a Milky Way field at (l,b) = (335 deg, 0 deg)
New photoelectric UBV photometry for 103 stars and MK spectroscopy for110 stars in a 21 sq-deg field at (l,b) = (335 deg, 0 deg) are studied,in addition to previous data for stars in this field. Most of the 112 OBstars considered may be separated into three groups associated with thespiral structure of the inner galaxy: one at 1.34 + or - 0.05 kpc, oneat 2.41 + or - 0.08 kpc, and one at 3.69 + or - 0.23 kpc. The remaining21 stars lie along the line-of-sight, with some possibly being asdistant as 9 kpc. The dust is found to be distributed in two distinctclouds, one in the local arm at 190 + or - 30 pc and the other in aninterarm cloud of variable extinction at 690 + or - 70 pc.
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Observation and Astrometry data
| Constellation: | Γνώμων |
| Right ascension: | 16h25m16.25s |
| Declination: | -50°44'45.0" |
| Apparent magnitude: | 8.266 |
| Distance: | 261.78 parsecs |
| Proper motion RA: | -1.5 |
| Proper motion Dec: | -15.3 |
| B-T magnitude: | 8.329 |
| V-T magnitude: | 8.272 |
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