... This information may be for older NA2 filters?? Filters There are 7 filter positions, containing the following filters from Custom Scientific . ... 0 - Bessell R . ... The only filter requiring a focus offset is the ND2 + R filter which will be measured on the sky. ... The red filter attached to the ND2 in position 6 is not the same as the Bessell R. Number 6 is an RG610 red glass filter ( Rolyn 65.1355 ) for the 610 nm cut-on. ... Focus . ... Guider Mechanical Controller (filter and focus) . ...

adapted from Observe: Eclipses, published in 1979 by the Astronomical League and "Safe Solar Filters," by B. Ralph Chou, Sky and Telescope, August 1981) . ... Tape TWO pieces of film together into a sandwich, and tape this over the opening in the cardboard. ... The cardboard frame will act as a shade from the bright Sun, while you safely observe through the film sandwich. ... Undeveloped film is not safe. ... tape . ... At the end of one of the tubes, tape the aluminum foil, and make a tiny pinhole. ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Click for more . ... Binary Star KL Dra . ... Pleasant March: slightly drier, milder and sunnier than average . 2016 April 7th . Cool, damp February with average sunshine; wettest winter for 139 years . 2016 March 16th . Discovering the stars at Armagh: Free St Patrick s day events hosted by Armagh Observatory . 2016 March 15th . ... Mild, wet January, slightly duller than average . ... 2016 January 15th . ...

To leave the frames behind, click here . 430-MHz Gregorian . ... RFI Situation . ... Receiver History . ... 422-442 MHz . ... For the current frequency v time 430-MHz RFI plot from the Arecibo "hill-top" monitoring system, click here . For the current frequency v time 430-MHz RFI plot (with band-pass correction) from the Arecibo "hill-top" monitoring system, click here . For the current daily rms/mean v frequency 430-MHz RFI plot from the Arecibo "hill-top" monitoring system, click here . ...

The Planewave Instruments 20-inch (0.5-meter) f/6.8 corrected Dall-Kirkham telescope at Moore Observatory in Kentucky and its identical companion at Mt. ... The CDK20 North at Moore Observatory has been our primary platform for developing technology for remote and robotic operation in the Shared Skies program. ... g'r'z'i' filter wheel . ... Axis quad video server to send realtime video to the remote observer . ... Telescope monitor camera in the dome also on the video server . ...

... Staff . ... Friends of Arcetri . ... Arcetri designs innovative superconductor microwave filters for the Sardinia Ratio Telescope . ... A new microwave component based on HTS technology has been presented in a recent issue of the Journal of Astronomical Instrumentation, produced by World Scientific Publishing Company, in the article тАЬ A high temperature superconductor microwave filter working in C-band for the Sardinia Radio Telescope тАЭ by Pietro Bolli and collaborators (Fig.1). ...

Astronomy Picture of the Day . ... 12.12.2008 . ... Credit Copyright: Rick Baldridge Explanation: As viewed from a well chosen location at sunset , October's gorgeous Full Moon rose behind Mount Hamilton, east of San Jose, California. ... In fact, tonight's Moon reaches its full phase at 1637 UT, within only a few hours of perigee , the closest point in its elliptical orbit . ... Publications with keywords: perigee - moonrise - full moon . Publications with words: perigee - moonrise - full moon . ...

... 2000 February 20 . The Virgo Cluster of Galaxies . ... Explanation: Pictured are several galaxies of the Virgo Cluster, the closest cluster of galaxies to our Milky Way Galaxy . ... It contains over 100 galaxies of many types - including spirals , ellipticals , and irregular galaxies. The Virgo Cluster is so massive that it is noticeably pulling our Galaxy toward it. ... Notable bright galaxies in the Virgo Cluster include bright Messier objects such as M61 , M87 , M90 , and M100 . ...

... Дни открытых дверей к юбилею САО РАН (12-14 апреля 2016 г.) . Международная конференция "Dark Ages and White Nights (Spectroscopy of the CMB)" (20-24 июня 2016 г.) . ... Международная конференция MULTI-SPIN GALAXIES - 2016 (26-30 сентября 2016 г.) . Международная астрономическая конференция "Физика звезд: от коллапса до коллапса" (3-7 октября 2016 г.) Архив . ... Подробнее.. ... 10.02.16 . ... БТА в реальном времени . ... Цейсс-1000 в реальном времени . ... Последнее обновление: 22/03/2016 ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... I have compiled a list of throughput filter curves from a variety of telescopes, instruments, and surveys. Click on the name of the filter to download it. The first line of each filter is the zeropoint for that filter. If the filter is in the AB system, it is listed as 0.0 (or in otherwords -48.55). ... Filter . Effective Wavelength . ... A_V . ... 0.987 . ... 0.050 . ...

... The analysis of NICMOS polarization images is aimed at determining the Stokes' Parameters, and from those the polarization angle and degree for each pixel. NICMOS Camera 1 and Camera 2 each contain three polarizers, whose principal axes of transmission are separated by 120 degrees. ... The images in the three filters need to be compared, in order to produce the Stokes' parameters. ... The Stokes parameters can then be combined to yield the polarized intensity, I p: . ...