There was a series of azimuth motion failures on 07dec09 and again on 31jan10. A motion failure can be caused by encoder showing that the system moved opposite to the direction requested. ... The moved the azimuth from 168 to 168+90 degrees at slew speed for the entire time. ... At each motion failure the azimuth position jumps up away from azimuth=168 (the requested position). ... All 3 failures show encoder velocity=0 while the amp velocity is non-zero prior to the failure. ...

... The f /96 camera of the FOC contains three linearly polarizing prisms with names POL0, POL60, and POL120. The E -vector pass directions of these prisms are 0 degrees, 60 degrees, and 120 degrees respectively, counterclockwise from the image x axis (-S direction), as projected onto the sky. ... The pipeline calibration for polarization observations is no different than for other images. ... You can then divide each of the three images by the expected throughput to correct for this difference. ...

... The dependence of velocity ellipsoid parameters for various types stars upon theirage was investigated. ... For metal-rich stars ([Fe/H] -0.1) the shape of velocity ellipsoid becomes more spherical with increasing age of the stellar group and it approaches the equilibrium shape. ... По данным uvby -фотометрии, изохронным возрастам и собственным движениям ~3500 F -звезд диска в окрестности 80 пс от Солнца исследованы зависимости параметров эллипсоидов скоростей различных звезд от возраста. ...

... Gallery . ... Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Cable wrap . Description: Allows for 270 degrees rotation in either direction. Image: Dione Smith . ... Cable wrap Allows for 270 degrees rotation in either direction. ... Powered by Gallery 3.0.9 (Chartres) . ...

Scaling relations and intrinsic motions in the interstellar neutral hydrogen clouds . ... Diameters, masses and velocity dispersions of about 7600 HI clouds were determined on the base of HI RATAN-600 Survey in the second and third quadrants of galactic longitudes in 180 degree 100 dg. ... It is shown that other important dependence - velocity dispersion versus cloud diameters, that is found from molecular clouds, in the case of HI clouds is completely absent ( figure 2 ). ... Figure 1. ...

... We start investigating the results from a non-magnetized (isotropic) plasma, before including the external magnetic field so important for space physics. ... propagating above the electron plasma frequency, w(pe) (reflection point for the waves) . note that, for very high frequencies, both phase and group velocities are equal to light velocity c, and we have electromagnetic wave in free space: even the electrons are unable to respond to the rapidly oscillating electric field! . ...

... This document and the attached postscript figure document an analysis that I did to determine the optimum midpoint and required ranges for both the rotator and azimuth for the 2.5 M telescope. ... I simulate a series of drift scans on the sky for tracks that cover the northern survey area. These tracks cover the range in survey latitude of -60 to +60 degrees, spaced by 10 degrees. ... Along each track the azimuth, elevation, and position angle of the CCD is computed at 1 minute intervals. ...

... Apparent Close Approaches of NEAs to the Stars for April 2016 Observatory 168 Kourovskaya 2016-Apr-01/18h24.9m/ Dist = 4.8 AV= 1.3 / min PA= 85.8° A= 50° h= 26° 1685 Toro RA= 8h07m57.634s Dec =+ 2°46'41.37 m= 16.0 UCAC2 32693651 RA= 8h07m57.649s Dec =+ 2°46'46.16 m= 15.1 2016-Apr-03/17h36.5m/ Dist = 10.0 AV= 5.3 / min PA= 53.5° A= 108° h= 24° 137170 1999 HF1 RA= 4h20m04.184s ...

... Table 1: Acceptable temperature difference Invar36 0 .0 5 C А (the CTE was selected as 0.7 for the FEA) Stainless Steel 304 0.002 CА(the CTE was selected as 17.2 for the FEA) Aluminium6061 0.0015 CА(the CTE was selected as 23 for the FEA) (2) Analysis of the temperature gradients of the mount generated by an ambient temperature difference of 0.5 CА on both sides of the mount Invar , S.S. or Al ... Stainless steel material is added to Table 4 and 5 for comparison with Invar. ...

The following observations were taken on Feb 6 by actively scanning the antenna over a 10 sq.degree field near 10h40m, -48d with the multibeam feed rotated approximately 15 degrees to the scan direction, which was alternately in RA and DEC (Observers: Barnes, Kesteven, Staveley-Smith, Wilson). ... Interference: As above, but with full robust processing. ... The data reduction and telescope interface uses AIPS++ , a new package of astronomical data reduction routines and C++ libraries. ...

This colorful display shows tiny differences (or "anisotropies") in the Cosmic Microwave Background (CMB) over the entire sky. The average temperature is just 2.73 kelvins (2.73 degrees Celsius above absolute zero), and the temperature differences span mere millionths of a degree. ... Until now, part of the Milky Way's motion inferred from the variation in the CMB was unexplained. Astronomers have discovered that the Milky Way and neighboring galaxies are being pushed from the Local Void. ...

... A vector , that's what. ... Graphically, each stretch on the ground or velocity can be represented by an arrow in its direction, its length giving the magnitude--for instance, an arrow AB 200 mm (milimeters) long for the airplane's motion and another one BC 40 mm long, in the same direction, for the wind. ... Just as one can combine two vectors into one--their sum--so it is also possible to move in the opposite direction--given a single vector, find two vectors whose sum it is. ...

Mars in the Loop . ... Credit Copyright: Cenk E. Tezel, Tun Tezel ( TWAN ) Explanation: This composite of images spaced some 5 to 7 days apart from late October 2011 (top right) through early July 2012 (bottom left), traces the retrograde motion of ruddy-colored Mars through planet Earth's night sky . ... On March 4th, 2012 Mars was opposite the Sun in Earth's sky, near its closest and brightest at the center of this picture. ... NASA Web Site Statements, Warnings, and Disclaimers . ...

... satvelsrc computes as a function of time the component of the spacecraft velocity vector in the direction of given celestial source. ... SAS_ODF . or named via the generic command line parameters -o or -odfdir (see taskmain for details). ... The source coordinates obtained from the ODF can be overridden with the command line paramters withsrccoord=yes srcra=<ra> srcdec=<dec> and withorthosrc=yes defines a fictitious source in the direction perpendicular to the orbital plane. ...

... More on 51 Peg: . The discovery of a Jupiter--mass planet in orbit around the solar--type star 51Peg has been reported by Michel Mayor and Didier Queloz (Geneva Observatory) on October 6th at the 9th Cambridge workshop on "cool stars, stellar systems, and the sun" held at Florence (Italy). ... Recall that the measurements of radial velocity only yield v sin i which in turn gives us M sin i. For most values of i, sin i will be greater than 0.5 and this gives a mass estimate of 0.5 Jupiter masses. ...

Trudy GAISH, vol. LXV, 1996 . Abstracts . The global distribution of average (5 O x 5 O ) depths . of Mohorovicic discontinuity on the Earth . ... Such analysis allows detecting whether the sources of the largest anomalies reside within the Earth's core. This is possible if the limit depths of the sources exceed the depths of the core-mantle boundary. ... by Pasinok S.L. Influence of the Earth’s cover on the polar free oscillation of the Earth’s inner core is considered. ...

... STScI-PRC00-35 THE MOTION OF RX J185635-3754 -- THE NEAREST NEUTRON STAR TO EARTH This photograph is the sum of three Hubble Space Telescope images. North is down, east is to the right. The image, taken by the Wide Field and Planetary Camera 2, is 8.8 seconds of arc across (west to east), and 6.6 seconds of arc top-to-bottom (south to north). ... All stars line up in this composite picture, except the neutron star, which moves across the image in a direction 10 degrees south of east. ...

Next: Evolution of Supernova Explosion Up: Gravitational Waves from Coalescing Previous: Gravitational Waves from Coalescing . The stochastic binary background produced by nearby galaxies from Tully's catalog at the frequency  Hz is shown in Figure  49 in terms of average strain metric amplitude per square degree in a given direction ( l , b ) on the sky: . where the sum is calculated over all sources in the given square degree of the sky; we assumed . ...

... Activity 3: Measuring the Position of the Sun in the Sky . Purpose: To give students the opportunity to measure the position of the Sun in the sky using simple tools and methods. ... Alternatively, you may have students devise their own methods of relative measurement and apply them to measuring the position of the Sun in the sky. ... Rangi is the sky, and when the Sun is near Rangi's head it is summer in New Zealand. ... Read the Maori story to students. ... back to Teachers' Newsletter Main Page ...

This page gives the name and meaning of the various parameters which can be queried in HyperLeda through SQL requests . ... real . ... actual error on t . ... log 10 of apparent major axis diameter d25 at 25 mag.arcsec -2 (d25 in 0.1') . ... actual error on logd25 . ... Apparent maximum rotation velocity of gas . ... log 10 of apparent corrected diameter (dc in 0.1') . ... total apparent corrected B-magnitude . ... total apparent corrected U-B color . ... Questions: leda@univ-lyon1.fr ...