The SPIcam:Sky Flats script allows you to take a series of twilight or morning flats, automatically increasing or decreasing the exposure time to roughly maintain a constant brightness for the images and dithering the telescope (using a 15" box) between each exposure. If you don't want automatic adjustment of exposure time then please use the normal SPIcam Exposure window, instead. ... nextEveTime = -288 log(e -prevTime/288 + e -(prevTime+45)/288 - 1) - (prevTime+45) . ...

Astronomy Discussion Forums . Forums: . Atm ћ Astrophotography ћ Blackholes ћ Blackholes2 ћ CCD ћ Celestron ћ Domes ћ Education . ... Discussion Forums . ... Brightest Northern Hemisphere Galaxy . Forum List | ... Post Message | ... In which constellation would I find the brightest galaxy in the northern hemisphere? ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Classical nova V2362 Cyg (N Cyg 2006, 21:11:32.34, +44:48:03.9, 2000 [position in ATel 928 is incorrect!] ) undergoes gradual increase of its brightness since middle of August, 2006 from the level of V = 11.9. ... Full width of Halpha line is 5900 km/s, and that one of Hbeta is 5300 km/s. We identified the strongest emission features as CIII+NIII blend centered on 4652A, [OIII]+NII blend on 5010A, NII+[NII] blend on 5708A, NaI+OI blend on 5920A. Absence of HeI lines at 6678 and 7065A is surprising. ...

... November 12, 1996 . Comet Hale-Bopp Passes M14 . ... Explanation : Comet Hale-Bopp continues its slow trek across the night sky, and can now be seen superposed near the bright globular cluster M14 . Will Comet Hale-Bopp become as bright in early 1997 as Comet Hyakutake did in early 1996? It is still too early to tell. ... Because of the size of coma , some speculate that the nucleus of Hale-Bopp is unusually large. ... Tomorrow's picture: Seven Jets from Comet Hale-Bopp . ... About APOD . ...

Measurement of Sky Brightness at the Iranian National Observatory Davoud Afshari1 and Sadollah Nasiri1,2 1Physics Department, Zanjan University, Zanjan 45195-313, Iran; Institute for Advanced studies in Basic Science (IASBS), Zanjan 45195-1159, Iran; Measurement of light pollution 2 Introduction Among 34 candidate sites at the central part of the country, 5 sites namely Garkesh (in Kashan ), Kolahbarfi(in Kashan ), Deynava (in ... One of these is light pollution. ...

... We present the ROSAT All-Sky Survey Bright Source Catalogue (RASS-BSC, revision 1RXS) derived from the all-sky survey performed during the first half year of the ROSAT mission in 1990/91. 18,811 sources are catalogued, with a limiting ROSAT PSPC countrate of 0.05 cts/s in the 0.1-2.4 keV energy band. ... Broad band images are available for a subset of the flagged sources. ... Retrieving the full catalogue The ROSAT All-Sky Survey Bright Source Catalogue can be retrieved via your WWW browser: 1. ...

... Развивающая игрушка Лягушка Bright Starts привлечет ребенка красочным видом, подарит новые ощущения и вскоре станет любимой игрушкой, приятной и веселой. ... Цвет: розовый . ... Цвет: Коричневый . ... Цвет: натуральный . ... Кружка имеет силиконовую крышку оранжевого цвета с прорезью для питья. ... Цвет: синий . ...

... No one is watching as he comes a walking. ... He goes through the door, he starts up the stairs. The sound of his footsteps, the sound of his breathing, The sound of the silence when no one was there. ... He never seemed to change. ... So much to do and so little time. He looks at the city where no one had known him. He looks at the sky where no one looks down. ... I found a way that will get me an answer. ... Right now ! ... One got Mrs. Gibbons above her right eye. ...

... Bad Astronomy . ... Bad Astronomy: The North Star, Polaris, is a very bright star. Good Astronomy: Polaris is a middling-bright star, easily missed. ... He said it was close to Polaris, the North Star, but he also said it was in the East. ... It's natural, I suppose, to think that such an important star should be bright, but really, that's a conceit, like thinking that the Earth is at the center of the Universe. If more people knew just why Polaris is the North Star, this Bad Idea would stop. ...

Next: *makevig, vigdata* - Apply Up: Calibration Previous: Calibration . Vignetting is a decrease in the effective area of the telescope mirror with increasing off-axis angle. It is due to a combination of a real decrease in the mirror area and a degradation of the mirror reflection efficiency at larger angles of reflection. ... Both the ROSAT and Einstein exposure maps exposure maps are corrected for vignetting. љ . makevig, vigdata* - Apply Vignetting Correction to an image . ...

... Астрософт (Модератор: tlgleonid ) > . UCAC2 Bright Star Supplement для Cartes du Ciel . ... Астрософт . ... Cartes du Ciel - Sky Charts . ... 08 Август 2008, 14:04:19 ? Также готов каталог I/294 The UCAC2 Bright Star Supplement (Urban+, 2004), являющийся северным дополнением к каталогу I/289 The UCAC2 Catalogue(Zacharias+ 2003). ... Ответ #1 : 08 Август 2008, 14:41:20 ? ... Самая слабая звезда в каталоге UCAC2 Bright Star Supplement - это 2UCA 50406212 Vmag: 15.19 в Малой Медведице. ...

... This paper describes various methods for the analysis of spectroscopic data, particularly as they relate to wavelength calibration of echelle-format spectra. ... Keywords: spectroscopy, Hough transform, wavelet transform, robust regression, echelle, wavelength calibration . ... Wavelet transform can be useful in complementing robust techniques for multiresolution analysis, and Section 4 presents an application of the Mexican hat transform to the detection of spectral features. ...

... Since moonshine is really reflected sunlight, the full Moon is on the average slightly brighter in mid-winter, when Earth is closest to the Sun. In addition, the distance of the full Moon also varies, due to the ellipticity ("eccentricity") of the Moon's orbit. On 22 December, 1999, the two effects combined to produce the brightest full Moon of the century. ... This year will be the first full moon to occur on the winter solstice, Dec. 22nd, commonly called the first day of winter. ...

Venus under the clouds. ... Venus is the second from the Sun and the nearest to the Earth planet of solar system. ... As for Venus, it has the densest atmosphere, the smallest rotation around the axis and the least eccentricity of the orbit Venus is the only planet whose own rotation is opposite it’s rotation around the Sun. ... The radiolocation survey of Venus by the soviet station "Venera - 15" and "Venera - 16" brought out in 1984 in the planets satellite`s orbit shoued the tarces of long walls. ...

MAIN PAGE . ... Nova Cygni August 1975! ... 1975/76: Comet West! ... Dr. Richard West (4th from left) & AAL members visiting SES Betzdorf on occasion of our club's 25th anniversary - October 1996 . Comet West Information . ... It was the brightest comet visible from Earth since Comet West in 1976. ... 1997: Comet Hale-Bopp! ... Thus Comet Hale-Bopp never got closer to Earth than Earth gets to the Sun. ... Comet Hale-Bopp JPL Page . ... 1999: Total solar eclipse over Luxembourg! ...

... SSAU History . SSAU roadmap . ... Student clubs . ... On June 27 SSAU student Vladislav Kozlov has become the winner in a medley relay of 4x100 meters at the European Games in Baku within the Russian team in swimming. ... Vladislav Kozlov, the first year student of SSAU Institute of Electronics and Instrumentation, at the last stage of freestyle swim managed to bring victory to his team ahead of the English and Polish sportsmen. ... e-mail: ssau@ssau.ru . http://www.ssau.ru . ...

... Objectives of the study . To survey and evaluate the technical and economical feasibility of European initiatives by start-up companies, for privately-funded crew vehicles for commercial human space flight. ... New commercial markets, among them space tourism, have a great potential to become major drivers in space technology development. This study aims at the assessment of the feasibility of European initiatives to address these new markets through the development of crewed space vehicles. ...

... Copyrightї1997 Bob Yen (byen@ix.netcom.com) (http://www.comet-track.com/hb/hb.html) . ... Information on Comet Hale-Bopp for the Non-Astronomer Hale-Bopp rotates about twice a day (3/14/97) . ... The Comet Observation Home Page was been selected to receive the Griffith Observatory Star Award for the week of February 2 - 8, 1997 for excellence in promoting astronomy to the public through the World Wide Web. ... Typically, about 1,000 individual users/computers access this page every day. ...

... Events . Gallery . ... I capture this in Boston at the middle night of 2013.8.15. The mag is increase to apporx 4.5 that time. Using QHY5L-II-Mono CMOS camera and Orion 8inchF3.9 exposure time 5sec*12frames . Submitted by Hongyun Qiu on 08/16/2013 17:12:53 . Picture Galleries . Astronomy Galleries . Club Events . Other Galleries . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

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