Weekly Bulletin on Solar and Geomagnetic Activity Highlights on 19 - 25.08.2013, Forecast on 26.08 - 02.09.2013, Carrington Rotations 2140, 2041 (04,64.08; 31,87.08.2013) SUNSPOT-FORMING ACTIVITY OF THE SUN CHANGED FROM HIGH (19.08) TO AVERAGE LEVELS, AND IN THE LAST DAY OF THE PERIOD FELL THE ALMOST TO THE SMALL. ... BY SOHO AND STEREO CORO- NOGRAPHS DATA THERE WERE OBSERVED 44 CME FROM WHICH 1 WAS "HALO" TYPE AND 3 WERE THE "PARTIAL HALO II" TYPE. ...

... Exposure Time Calculator (ETC) . Survey processing . ... VISTA is a 4-m class wide field survey telescope for the southern hemisphere, equipped with a near infrared camera (1.65 degree diameter field of view at VISTA's nominal pixel size) containing 67 million pixels of mean size 0.34 arcsec and available broad band filters at Z,Y,J,H,K s and a narrow band filter at 1.18 micron. A wide field visible camera, if constructed, could also be used on VISTA. ... Tile . ... ESO VISTA Public Surveys . ...

Determination of mass of Jupiter and that of some minor planets from observations of minor planets moving in 2:1 commensurability with Jupiter Olga M. Ko chetova and Yulija A. Chernetenko Institute of Applied Astronomy, St. Petersburg, Russia September 19, 2000 Keywords: Jupiter 's mass , asteroid's masses , observations of minor planets Great numb er of observations of minor ... Hoffmann (1989) p ointed out the fruitfull of that approach. ... Table II. ...

... The First (Experimental) International Astronomy Olympiad . The following olympic problems were proposed for the participants on the theoretical part: Grades 8-10 . ... Why is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountain top? ... What will an observer looking to the Moon through the telescope see? ... Paper with a drown circle and table of maximal elongations of Mercury and Venus had been done for participants. ...

Stellarium 0.12.3 . ... StelCircleArcRenderer Class Reference . Provides functions to draw circle arcs using StelRenderer . ... drawGreatCircleArc (const Vec3d &start, const Vec3d &stop, const SphericalCap *clippingCap=NULL, void(*viewportEdgeIntersectCallback)(const Vec3d &screenPos, const Vec3d &direction, void *userData)=NULL, void *userData=NULL) . ... Create a circle arc renderer to draw multiple circle arcs . ... void(*)(const Vec3d &screenPos, const Vec3d &direction, void *userData)љ . ...

... Our scientific interest is an accuracy of asteroid CCD observations obtained by amateurs and professional astronomers all over in the World. ... These data help us to analyse an accuracy of real CCD positions in the MPC Database. ... Do you test your observations of the small Solar System bodies permanently before sending them to the International Minor Planets' Center? ... Do you know a real accuracy of your positional CCD-observations in comparison with the other observatories' one ? ...

Statistics of sunspot activity . The sunspot indices . ... Visual indices of solar activity . ... n - number of spot groups . A - Waldmeier class of unipolar spot groups without penumbra . B - class of bipolar spot groups without penumbra . C - class of bipolar spot groups with one penumbra pole . D - class of small bipolar spot groups with two penumbra poles . E - class of middle bipolar spot groups with two penumbra poles . ... H - class of unipolar penumbrated spot groups . ...

... October 8, 15:00 15:40 . ... PDF [7.2б MB] October 8, 15:40 16:10 . ... The sky brightness, atmospheric extinction, cloud coverage and auroral appearance are obtained from these images. ... Aurorae are identified by comparing the observed sky brightness to the sky brightness expected from this model. ... The identification of few potential sites for future's larger facility require several instruments, measuring various site characterizing parameters. ...

... Recent Topics . ... MAO main . ... Newsletter : July 2014 : International Space Science Institute . ... Тема: Newsletter : July 2014 : International Space Science Institute . ... 33 Teams have been selected for implementation from the proposals received in response to the 2014 Call for International Teams by the Science Committee. ... If you prefer not to receive future email from the International Space Science Institute, please unsubscribe here. International Space Science Institute . ...

Orbit . ... The orbit of the RadioAstron provides four types of study: . rough images of radio sources with ultra-high angular resolution, using all baselines up to the radius of the apogee, that is much larger than Earth diameter; . ... high quality imaging of radio sources, with moderate resolution, by observing either with small projected base lines Earth-spacecraft, i.e. close to the orbital plane, or near the perigee. ... high accuracy orbit determination. ... Space Radio Telescope . ...

In the PROJECT we are using the following peculiar . features of RATAN-600 . ... Brightness temperature sensitivity being equal to the antenna temperature sensitivity .. ... Receiver system .. ... Using aperture averaging effect. dual- beam and dual (multi-) frequency filtration, we demonstrated full filtration of the atmosphere noise down to the receiver noise at all scales of acoustics peaks ( Fig.1 , Fig 2 ). ... We select this frequency as the central one in our project. ... Antenna surface . ...

... The Sun has come all of one day away from breaking its record for the longest period of inactivity for the last decade - reaching a mid-summer low and falling into yet another state of "hibernation". Yesterday, on the first day of autumn, new sunspots appeared on the surface of the Sun following an absence of almost 50 days. ... The first low lasted 51 days, from 21 July until 11 September last year. ... Now, almost a year later, it seems the Sun has hit a new low almost as "deep" as the first. ...

... ABOUT ST-ECF . ... This stipulated that ESA provide one of the science instruments, the Faint Object Camera (FOC), the solar arrays plus their associated electronics, and fifteen ESA staff members on assignment to the Institute. In exchange, ESA astronomers would get a minimum of 15% of the observing time on Hubble and a complete copy of the science data archive. ... It was apparent early on that the archive would be shared between Hubble and the science instruments at the ESO telescopes. ...

... Fitting the observed dependence includes calculations of the polarization cross-sections averaged over particles orientation and size distribution, their normalization and the comparison of obtained dependencies with Serkowski's curve representing observational data for a chosen star. ... Variations of the polarization factors with wavelength are shown in Fig. 16 for homogeneous spheroidal particles with PF orientation. ... The distinction between prolate and oblate spheroids is also clearly seen. ...

The British Isles lie off the north-west coast of continental Europe. They are made up of Great Britain (England, Scotland and Wales) and Ireland (Northern Ireland and the Independent Irish Republic) and some 5,000 smaller islands. The total area of the British Isles is 121,000 square miles (320,00 square kilometers). ... There are no high mountains in Britain. ... On the other hand the north-west of Scotland and the Scottish islands are among he most sparsely populated areas in Europe. ...

JSC History . JSC Oral History . NASA History . History-NASA Centers . ... Images . ... These links provide access to many of the NASA image collections. Great Images from NASA's History . http://grin.hq.nasa.gov/ . JSC Human Spaceflight Media Gallery . http://spaceflight.nasa.gov/gallery/index.html . NASA Image Gallery . http://www.nasa.gov/multimedia/imagegallery/index.html . NASA Multimedia Gallery . http://www.nasa.gov/gallery/index.html . ...

... M3 is a AAAP member, an comprises perhaps 500,000 engineer, and an associate of stars and has an apparent the astrophysics community diameter of 19 arc-min with a and the SDSS project. ... Opportunities for AAAP Members. ... Many of our astronomers are finding participating in Project ASTRO NOVA so rewarding and enjoyable that they make several additional visits. Astronomers who are interested in participating in Project ASTRO NOVA should request and fill out an Astronomer Volunteer Form. ...

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. 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.

StarShine-3: . ... The satellites are covered by nearly 1000 small, front-surface aluminum mirrors that are machined by technology students in Utah and polished by tens of thousands of students all over the world. ... And this is only small story about it. ... We will be able to measure the angular position of that satellite by observing sunlight flashes from small mirrors mounted on the surface of the satellite, as it passes across the starry sky before sunrise and after sunset.. ... Starshine 3 . ...