NGC 6193 (also known as Caldwell 82 or the Firebird Cluster) is open cluster containing 27 stars in the constellation Ara, visible to the unaided eye. NGC 6193 lies at the center of the Ara OB1 association, which extends over a square degree. The cluster is associated with (and provides the energizing radiation for) neighboring regions of the nebulosity NGC 6188.
Cluster members NGC 6193 is dominated by two O class multiple star systems within 10" of each other at the centre of the cluster, and a probable binary B0 giant. There are at least 20 other early B stars in the cluster, of 9th and 10th magnitude.
# Name Right ascension Declination mV Spectral type Comment 56 5.62 O3−3.5 V + O5.5−6 V + O6.5−7 V Triple system 55 HD 150135 6.89 O6.5V((f))z Binary 45 HD 150041 7.06 B0III Variable 37 HD 149834 9.17 B2V Binary? 59 10.32 B4V CD-48 11077 10.42 B2.5V 58 CD-48 11075 10.05 B2.5V 54 CD-48 11071 8.45 B1V Binary 53 CD-48 11069 9.55 B1V 40 CD-48 11039 11.02 B3V 42 CD-48 11046 10.91 B2.5V 43 CD-48 11051 10.39 B1h CD-48 11060 10.71 B3V 47 CD-48 11061 11.21 B3.5V binary 50 CD-48 11062 11.42 B3.5V 52 CD-48 11065 11.06 B2.5V Wrongly cross-referenced to HD 150136 in Herbst 57 CD-48 11076 10.10 B2V 63 CD-48 11082 10.38 B2V 65 CD-48 11086 10.38 B2.5V 66 CD-48 11088 10.05 B2.5V 67 CD-48 11090 10.59 B2.5V
Image gallery
References
External links
Universität Wien: Plot of stars in NGC 6193 (WEBDA) Universität Wien: IDs of stars in NGC 6193 (WEBDA) Encyclopedia of Science: Entry for NGC 6193
Aladin: Image of NGC 6193, centered on HD 150136