Dudley Observatory, American Astronomical Society, American Institute of Physics · New York [etc.] American Institute of Physics [etc.] · leaf 122
se a dark back-ground, illuminating the negative with a strong side-light:bv this procedure all the fainter obiects become luminous, blurring factor istYiereioxe 1.08. The analytical expression for this factor (Astr. Jour., No. 435) is1 cos V cosi V which gives, as it should, the same value. When… … ASTRONOMICAL JOURNAL No and seventh exposures by the forinulas, ax + III/ + (• + J = X,(/.r + eij + f + // = .(/, These in tuiu were reduced to right-ascension and decli-nation by means of the st.andard stars published in theliulletins of the astrophotographic congress. Two methods means of the…
Astronomy
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