Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..695l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 100, Sept. 1990, p. 695-709.
Astronomy and Astrophysics
Astronomy
3
Astronomical Spectroscopy, Open Clusters, Stellar Spectrophotometry, B Stars, Color-Color Diagram, Eclipsing Binary Stars, Interstellar Extinction, Ubv Spectra, Variable Stars
Scientific paper
Multicolor photometry and MK classification spectroscopy have been obtained for the sparse collection of stars known as van den Bergh and Hagen cluster No. 99. The group appears to be a true open cluster composed of at least 24 members with a mean reddening of E(B-V) = 0.05 mag, a mean distance modulus of 8.30 mag and an age of approximately 100 million years.
Landolt Arlo U.
Levato Hugo O.
Malaroda Stella M.
Perry Charles L.
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