منابع مشابه
The Solar parallax with the transit of Venus
In this note I show how one can derive the timing of the four contacts of Venus with the sun disk as a function of the location of the observer and of the solar parallax with a relatively simple approximate formula whose accuracy is sufficient to process the observations of a network of observers. Two models are discussed : one, linear in the coordinates of the observer, has an accuracy of 5 to...
متن کاملThe Effect of the Transit of Venus on ACRIM’s Total Solar Irradiance Measurements: Implications for Transit Studies of Extrasolar Planets
We have used the 8 June 2004 transit of Venus (ToV) as a surrogate to test observing methods, strategies and techniques that are being contemplated for future space missions to detect and characterize extrasolar terrestrial planets (ETPs) as they transit their host stars, notably NASA’s Kepler mission planned for 2008. As an analog to “Kepler-like” photometric transit observations, we obtained ...
متن کاملTransit of Venus described using three-dimensional solar atmosphere STAGGER-grid simulations
Context. An important benchmark for current observational techniques and theoretical modeling of exoplanet atmospheres is the transit of Venus (ToV). Stellar activity and, in particular, convection-related surface structures, potentially cause fluctuations that can affect the transit light curves. Surface convection simulations can help interpreting the ToV as well as other transits outside our...
متن کاملSolar Wind Absorption by Venus
The fraction of solar wind which interacts with the dayside ionosphere and atmosphere of Venus was calculated assuming the presence ofmagnetic field fluctuations in the, • ionosheath region and taking into consideration the interaction with the upper neutral atmosphere extending above the ionopause. The Monte Carlo calculations indicated that fluctuations with Brms/(B) of 0.3, a not unreasonabl...
متن کاملRetrieving Properties of Thin Clouds from Solar Aureole Measurements
This paper describes a newly designed Sun and Aureole Measurement (SAM) aureolegraph and the first results obtained with this instrument. SAM measurements of solar aureoles produced by cirrus and cumulus clouds were taken at the Atmospheric Radiation Measurement Program (ARM) Central Facility in Oklahoma during field experiments conducted in June 2007 and compared with simultaneous measurements...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2012
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921313002986