Trigonometric parallaxes determined with the Yerkes Observatory 40 inch refractor. VII

Details Trigonometric parallaxes determined with the Yerkes Observatory 40 inch refractor. VII Trigonometric parallaxes determined with the Yerkes Observatory 40 inch refractor. VII

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92..989v&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, Oct. 1986, p. 989-992. Research supported by the University of Chicago and NSF.

Astronomy and Astrophysics

Astronomy

11

Stellar Motions, Stellar Parallax, Stellar Spectra, Subdwarf Stars, White Dwarf Stars

Scientific paper

Parallaxes and proper motions based on observations with the 40 in. refractor of the Yerkes Observatory are presented for 21 stars. Plates were measured on the MADRAF PDS microdensitometer in Madison, WI, yielding an increase in precision of a factor larger than 2 over previous parallaxes measured on the Yerkes measuring machine. The average standard error of these parallaxes is ±0arcsec.0023. Several of these stars are subdwarfs.

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