Statistics from S. Pesci and P. Mazza logbook. I began my visual hunting program in 1991, after some ten years of variable star observing and deep sky. My patrol galaxies were some one hundred circumpolar galaxies, which were suveryed with a 45cm home made Dobsonian. ... These are checked on average 10-15 times a year, during 35 to 45 nights (numbers depend much on weather), mostly on weekends and holidays. Since 1995 Piero Mazza has joined my search with his 40cm home made telescope. ...

... The simple pair of formulas derived in problem (8) . ... around the z axis, , giving the above result and producing (x',y'), while z remains the same, so that in the new system z' = z. Then we rotate (x',y',z') by an angle ? around the x' axis, using the same formulas but with (y',z', ?) in place of (x,y, ?) ... Knowing its semi-major axis a, eccentricity e and mean anomaly M, one can derive its true anomaly f (using appropriate formulas, not given in #12a) and from it the radial distance r . ...

... Fractional flux density variations of between 5 and 100 per cent (typically 15-25 per cent) have been detected on a range of time-scales from 1 to 12 years. ... The 151-MHz flux densities have been indirectly scaled to the 6C flux scale. ... Amongst the 72 sources for which the chance of being a true variable is greater than 0.8, typical maximum flux density variations of 15-25 per cent are seen; eight objects show variations greater than 50 per cent, with one source varying by more than 100 per...

. XMM-Newton Science Analysis System . rmfgen (rmfgen-1.55.1) [xmmsas_20080701_1801-8.0.0] . Meta Index / Home Page / Description . rmfgen writes out RMF matrices in variable-length vector column format. This results in smaller matrices than the alternative fixed length format and reduces the demands on machine resources. The default thresholding used is such that elements less than are ignored by default. XMM-Newton SOC/SSC -- 2008-07-02

... Stars . ... Cepheid variable stars have been known since the 18th century. ... Regularly brightening to a peak over days, weeks or months before fading these variable stars were remarkable curiosities to astronomers in past centuries.€а The term Cepheid is taken from the star Delta Cephei in the constellation of Cepheus, which was identified as variable€а in 1784 by the teenaged prodigy John Goodricke (1764-96). ... Tweets that mention Cepheids: Inconstant Stars which break the rules | ...

previous next contents attributes index . ... abbreviated form (e.g., WWW, HTTP, etc.) ... bold text style . ... large text style . ... table caption . ... table column . ... table column group . ... deleted text . ... directory list . ... heading . ... HTML . ... document root element . ... italic text style . ... form field label text . ... strike-through text style . ... small text style . ... table header cell . ... table header . ... teletype or monospaced text style . ... underlined text style . ...

... YFIT=A(0)+A(1)*X+A(2)*X^2+.. ... Apr 21, 1988 RWT GSFC use new DETERM_PDP ; Aug 29, 1989 RWT modify for SUN IDL ; Jun 21 1991 GRA CASA cleaned up; tested on SUN, DEC, VAX; ; updated prolog; ; 11 May 94 PJL print a warning if any of the weights are negative ; ;- ;****************************************************************************** pro wpolyfit ,xin,yin, weight , ndeg ,a, yfit , chisqr ; npar = n_params(0) if (npar eq 0) then begin print,' WPOLYFIT ,XIN,YIN, WEIGHT , ...

... Latest Supernovae . ... Sorted by Name For the year 2016 , 2097 supernovae and 12 extragalactic novae were reported. 172 of these supernovae were named by CBAT, 1498 were given possible supernova designations, and 427 were not reported to CBAT. 36 supernovae were found in NGC/IC galaxies, 147 were found in named galaxies 46 objects were discovered by amateurs 0 were brighter than 13th Magnitude 19 were brighter than 16th Magnitude 198 were brighter than 18th Magnitude 145 ...

Permitted Context: %text . ... The <IMG> tag is used to incorporate in-line graphics (typically icons or small graphics) into an HTML document. This element is NOT intended for embedding other HTML text. ... Browsers that cannot display in-line images ignore the IMG element unless it contains the ALT attribute. ... Take values TOP or MIDDLE or BOTTOM, defining whether the top or middle or bottom of the graphic should be aligned with the baseline for the text line in which the IMG element appears. ...

... Distribution of orbital elements for the RR Lyrae stars. Results for stars with [Fe/H ] > -0.95 (left column), [Fe/H ] < 0.95 and V res < 290 km/s (middle column), and [Fe/H] < -0.95 and V res > 290 km/s (right column) are shown separately. In the top row, we have plotted normal curves fitting the distributions. ... next figure | privious figure . ...

The ESA/ESO Astronomy Exercise Series 2 . The Distance to Messier 100 as Determined by Cepheid Variable Stars . ... The small variations in distance to the individual Cepheid variable stars in the Cloud are negligible compared with the much larger distance to the SMC. ... In this way Cepheid variable stars can be used as one of the 'standard candles' in the Universe that act either as distance indicators themselves or can be used to calibrate (or set the zero point for) other distance indicators. ...

... A new bright LBV (Luminous Blue Variable) star was detected in M33 galaxy. LBV stars are the most massive stars in the final stages of evolution before exploding in of supernovae. ... The new LBV star (Fig.1) is the seventh in M33. ... It is one of the brightest LBV stars of the M33 galaxy. ... The brightest object is the core of the galaxy, - a compact star cluster comprising a supermassive black hole. The new LBV star N93351 is located down and to the left from the core. ...

ARCSAT ID NUMBER: AS08 DESCRIPTIVE TITLE: Monitoring long-term orbital period variations and transient events in bright Cataclysmic Variables PI: Paula Szkody OBSERVER(S): Zhibin Dai UNCERTIFIED/UNTRAINED OBSERVERS: COLLABORATORS: Zhibin Dai CONTACT INFORMATION: Zhibin Dai E-mail: zhibin_dai@ynao.ac.cn off: (86) 871-67339079 Res: Cell: (86) 18988418816 TIME REQUESTED: Priority order time moon phase 1. May 2 - 8 dark 2. May 30 - June 5 dark 3. ...

GCVS Variability Types and Distribution Statistics of Designated Variable Stars According to their Types of Variability ======================================================================== I. GCVS Variability Types. ... The new variability types (ZZO, AM, R, BE, LBV, BLBOO) have been added in the Name-Lists 67- 72 and in the GCVS vol.V. ZZO ZZ Cet type variables of the DO spectral type showing HeII and and CIV absorbtion lines in their spectra. ... RCB Variables of the R Coronae Borealis type. ...

... StarCalc Home Page - Downloads . ... File . StarCalc (English version) . ... With minimal configuration, version 5.72 of StarCalc includes the next interfaces: "Horizon", "Horizontal coordinategrid", "Equatorial coordinate grid", "Constellation boundaries", "Constellation lines", "Constellation names", "Star proper names", "Bright Star Catalog", "Deep-sky objects", "Sun", "Moon" and "Planets and satellites" . Plugins for StarCalc . ... Interface to NGC 2000 (plugin + catalog file) . ...

This module provides for documents with Server Side Includes (SSI). ... Any document with handler of "server-parsed" will be parsed by this module, if the Includes option is set. If documents containing server-side include directives are given the extension .shtml, the following directives will make Apache parse them and assign the resulting document the mime type of text/html : AddType text/html .shtml AddHandler server-parsed .shtml The following directive must be given for ... cgi . ...

Titan . ... Hubble Space Telescope Images of Titan's surface . ... Later that year, it will release the European-built Huygens probe for a descent through Titan's atmosphere. ... This artist's rendering shows the European Space Agency's Huygens probe descending into the atmosphere of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ... This artist's rendering shows the Huygens probe on the surface of Saturn's moon Titan after being released by NASA's Cassini spacecraft. ...

The Astronomy Shop . ... AstroGuide | ... Shop | ... Books | Bright Star Atlas . ... Add this accurate and inexpensive star atlas to your collection for thosetimes you want to travel light. ... Web . www.astronomy.net . About Astronomy Net | Advertise on Astronomy Net | ... Unless otherwise specified, web site content Copyright 1994-2016 John Huggins All Rights Reserved . dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . are trademarks of John Huggins ...

... Sun Image and Animation Index Additional Sun Resources . ... The Sun's outer visible layer is called the photosphere and has a temperature of 6,000њC (11,000њF). ... The corona is the outer part of the Sun's atmosphere. ... Sun's magnetic field, prominences, solar wind, aurora . ... This image of 1,500,000њC gas in the Sun's thin, outer atmosphere (corona) was taken March 13, 1996 by the Extreme Ultraviolet Imaging Telescope onboard the Solar and Heliospheric Observatory (SOHO) spacecraft. ...

STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade 4M Community . ... Telescopes . LX850 Series . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... H-Alpha Filters . ... Coronado Accessories . ... Meade Series 4000 #905 Variable Polarizing Filter (1.25") . ... Meade Series 4000 #905 Variable Polarizing Filter (1.25") #07286. ...