Map-based trigonometric parallaxes of open clusters: The Praesepe

Details Map-based trigonometric parallaxes of open clusters: The Praesepe Map-based trigonometric parallaxes of open clusters: The Praesepe

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...428..166g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 428, no. 1, p. 166-169

Astronomy and Astrophysics

Astrophysics

14

Astrometry, Praesepe Star Clusters, Stellar Parallax, Stellar Spectrophotometry, Algorithms, Main Sequence Stars, Weighting Functions

Scientific paper

Trigonometric parallaxes for stars in the Praesepe open star cluster are deduced from data collected with the Multichannel Astrometric Photometer (MAP) at the Thaw Refractor of the University of Pittsburgh's Allegheny Observatory. The weighted mean parallax of five cluster members is +5.21 +/- 0.79 mas (0.00079 arcsec), corresponding to a distance modulus of 6.42 +/- 0.33 mag. We briefly compare this result with that derived earlier for the Hyades and note agreement with the distance found by main-sequence fitting. We also discuss briefly an improvement in the weighting scheme of the centroiding algorithm used in this series.

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