내용
사진
사진 업로드
DSS Images Other Images
관련 글
Photographic astrometry against a bright sky - Theory and application Theoretical, experimental, and statistical arguments are given todemonstrate that daytime astrometry can be a viable technique in somecircumstances. In particular, a scheme is outlined for a daytimeobservation of the gravitational deflection of light by the sun.Detailed examination of the photographic astrometry approach shows thatthe accuracy expected from a single plate exposed to a star field aboutthe sun is expressible in terms of the uncertainties with which thepositions of the images are determined. An experimental determination isperformed, yielding the astrometric positional accuracy as a function ofthe magnitude of the star, the brightness of the background, and thesensitivity of the measurement process. This result is extrapolated tothe light-deflection configuration by using measurements of skybrightness as a function of observer altitude and the angular separationof the observed region of sky from the sun. Application to star fieldsalong the ecliptic indicates an expected accuracy of 1% to be attainablefrom 85 to 200 plates.
| Spectral and Luminosity Classification of the Bright Sequence Stars in the C Regions. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1955ApJ...121...32N&db_key=AST
|
새 글 등록
관련 링크
새 링크 등록
다음 그룹에 속해있음:
|
관측 및 측정 데이터
천체목록:
|