Accession Number : ADA548227


Title :   CCD Photometry of the Open Cluster Tombaugh 5 in the Vilnius System


Descriptive Note : Journal article


Corporate Author : NAVAL OBSERVATORY FLAGSTAFF AZ


Personal Author(s) : Zdanavicius, J ; Vrba, F J ; Zdanavicius, K ; Straizys, V ; Boyle, R P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a548227.pdf


Report Date : Jan 2011


Pagination or Media Count : 14


Abstract : We present the results of eight-color CCD photometry of 674 stars in the direction of the open cluster Tombaugh 5 in Camelopardalis. The stars are observed in the Vilnius system supplemented by the broad-band I filter the field is of 22' diameter, the limiting magnitude is V = 17.7 mag. The catalog contains the coordinates, V magnitudes, seven color indices, two-dimensional spectral types determined from photometric parameters, interstellar extinctions and distances. The color-magnitude diagram plotted for 480 individually dereddened stars is used to identify cluster members and to determine the distance (1.74 kpc) and age (200-250 Myr) of the cluster. The faintest cluster stars classified are of spectral class GO. The cluster contains two blue stragglers of spectral classes B2-B4, both of them seem to be visual binaries. The extinction Av for the cluster stars is non-uniform, being spread between 2 and 3 mag, with a mean value of 2.42 mag. The extinction vs. distance dependence can be modeled by the Parenago exponential curve with two dust concentrations in the Camelopardalis dark clouds at about 150 pc and the Cam OBI association clouds at 0.9-1.0 kpc.


Descriptors :   *CLUSTERING , *PHOTOMETRY , *STARS , CLOUDS , COORDINATES , DARKNESS , INTERSTELLAR SPACE , LIMITATIONS , PARAMETERS , RANGE(DISTANCE) , REPRINTS , SPECTRA


Subject Categories : Astronomy


Distribution Statement : APPROVED FOR PUBLIC RELEASE