The Parallax Project
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Search the Publications of the Allegheny Observatory, Vols. 1- 10
Enter criteria into one or more fields below:

Field Name Input Format Explanation
AO Number integer Allegheny Observatory Number
Star Name text Search automatically truncates. Use the virtual keyboard below to enter Greek characters. Mark superscripts and subscripts according to this example:
W<sub>2</sub> 18<sup>h</sup> 979 retrieves W2 18h 979
RA1900 :: hh:mm:ss Enter entire position - Results include values +/- 20 sec
Declination : +/-hh:mm Enter entire position - Results include values +/- 5 min
Parallax arcsec Include decimal point
Parallax Error arcsec Include decimal point

Virtual Keyboard for including Greek characters in star names (some older browsers might not display characters correctly):
α β γ δ ε ζ η θ ι κ λ μ ν ξ π ρ σ Σ τ υ φ χ ψ ω