... 87e24 5.24 .65 -4.4 -243 Earth 6378 5.97e24 5.52 .30 - 0.99 Mars 3397 6.42e23 3.93 .15 -2.0 1.03 Jupiter 71492 1.90e27 1.33 .52 - 2.7 0.41 Saturn 60268 5.68e26 0.69 .47 0.7 0.45 Uranus 25559 8.68e25 1.32 .51 5.5 -0.72 Neptune 24766 1.02e26 1.64 .41 7.8 0.67 Pluto 1150 1.27e22 2.06 .55 13.6 -6.39 ( z ... .12 -12.7 S Phobos 11 1.08e16 1.9 .06 11.3 S 13.5 x 10.8 x 9.4 Deimos 6 1.80e15 1.8 .07 12.3 S 7.5 x 6.1 x 5.5 Metis 20 9.56e16 2.8 .05 17.5 ... 72 x 43 x 32 Pandora 42 2.20e17 0.7 .9 16.5 ? ...

Computer Ephemeris. Ephemeris for physical observations of the planets. Explanations. Each row of the table contains for date specified at 0h of Time Terrestrial Dynamical: . ... position angle of axis of planetary rotation (degrees) - 'P', . ... illumanated part of the disk - k, . ... position angle of disk point with minimal illumination (degrees), . longitude of central meridian of the disk (degrees) - 'merid1' - system I and so... phase correction (degrees). ...

. Chairs . Teachers . Postgraduate Students . Undergraduate Students . Courses . Head: A.M.Cherepaschuk . Vice-Head: A.C.Rastorguev . Webmaster: Yuri V. Pakhomov . pakhomov@sai.msu.su

... 8, ``Celestial Mechanics'', 2002 Physical libration of the Moon: the results and the perspectives N. Petrova 1 , A. Gusev 1 , K. Heki 2 , H. Hanada 2 , N. Kawano 2 and ILOM Research Group 2 1 Kazan State University, Kazan, Russia 2 National Astronomical Observatory, Mizusawa, Iwate, Japan Beginning of the new millenium is marked by the reviews of results and problems in the field of lunar physical libration (LPhL) (Petrova, Gusev, 2001; Williams et al., 2001). ... 2001, 80, 215. ... 2001, 106, No. ...

TUI supports the following offsets: . Object Arc offset by a given amount on the sky (i.e. along the arc of a great circle). ... Arc offsets are useful for moving a different portion of your object or a different nearby object onto the boresight . ... Object Arc XY this is identical to an Object offset except that it has been rotated to align along the instrument x-y axes. ... This is just like the Calibration XY offset, except that it is typically cleared when you slew to a new object. ...

... 1 erg = 0.1 microjoules . 1 Jansky = 10**-26 watts per metre square per hertz . 1 Angstrom = 0.1 nanometres . ... 1 Astronomical unit = 1.4960 times 10**11 m . ... Mass of Sun = 1.989 times 10**30 kg . ... Mass of the Earth = 5.976 times 10**24 kg . Mass of Jupiter = 318 times mass of Earth . Solar constant = 1.37 kW per metre . c= 3 times 10**8 metres per second . ... Mass of Proton = 1836.1 times mass of electron . ... Stefan Boltzmann constant = 5.67 times 10**-8 W m**-2 K**-4 . ...

... The Rotating Jets of Comet Hyakutake . ... At this time, the comet's dust and ion tail will be at their greatest physical length. ... Although much of this material ends up in the tail , some interesting features can be seen close to the comet's three kilometer nucleus . Because the comet's nucleus rotates, the jets can be seen to form arcs around the comet's center resembling a pinwheel. The above photograph, taken April 8, shows two expanding arcs of cometary material and two source jets. ...

... The aim of this workshop is to get together theorists, who develop models leading to such cosmic polarization rotation (CPR), and experimentalists, who search for CPR using a variety of complementary methods, in order to discuss current results and future directions. The workshop will take place at the Villa Il Gioiello on the Arcetri hill near Florence, where Galileo, the first scientists to test the equivalence principle, spent the last 10 years of his life. ... Home . ... cpr@arcetri.astro.it . ...

Function: GETROT Purpose: Returns the rotation angle of a subset. Category: PHYSICAL COORDINATES File: cotrans.c Author: K.G. Begeman Use: INTEGER GETROT ( SET , Input character SUBSET , Input integer CROTA ) Output double precision GETROT Returns: -4 Internal error -3 No sky coordinates found in set. 2 Error in subset dimensions. 1 Set does not exist. 0 No error SET Name of data set. SUBSET Subset coordinate word. CROTA The rotation angle of the subset. ...

... RECOMMENDED VALUES OF PHYSICAL CONSTANTS AND CONVERSION FACTORS. ... This reference must be included when these constants are used in a context where their full accuracy is important. ... elementary charge (of proton) . ... gravitational constant . ... unified atomic mass constant . ... of electron . ... of proton . ... Planck constant . ... Rydberg constant, m 0 2 m e e 4 c 3 /8h 3 . ... fine structure constant, m 0 e 2 c/2h . ... Bohr radius, h 2 ( pm 0 c 2 m e e 2 ) . ... Bohr magneton, e h /2m e...

. This quantity is the physical maximum velocity rotation corrected for inclination, expressed in km/s. It is deduced from the parameter vmaxg after correcting for inclination using incl . This rotation velocity is calculated from both the 21-cm line widths at different levels and/or the available rotation curves (generally H_alpha rotation curves). The rotation of the stellar component is given in the parameter vmaxs . HyperLeda . Questions: prugniel@obs.univ-lyon1.fr

... R2397 Date Received: 2008-Feb-05 16:34:37 Technical Page Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: We propose delay-Doppler radar imaging, physical modeling, satellite searches, and orbital refinement of near-Earth asteroids 1998 CS1, 1998 UT18, 2004 LV3, 2004 XL14, and 2005 GN59, which are strong targets during October 2008-January 2009. ...

... An estimate the rotation period of cometary nuclei is important for understanding and describing the physical processes of the cometary activity. Unfortunately, the measurements of the rotation periods of the comet nucleus depend on the model assumptions and it is one of the main reasons for the scatter of the estimates given in various articles for a given comet. ... Right: the image of the comet 29P/Schwassmann-Wachmann 1 obtained at the 6-m telescope. ...

... In addition to time, frequency, and scale, there are two other coordinate axes within this transform space: shear-in-time (obtained through convolution with a q-chirp) and shear-in-frequency (obtained through multiplication by a q-chirp). Signals in this multidimensional space can be obtained by a new transform which we call the ``q-chirplet transform'', or simply the ``chirplet transform''. ... CHIRPLET TRANSFORM SUBSPACES . ... Relationship Between Auto Chirplet FF Plane and Radon Transform . ...

Next: This Work Previous: Rotation Periods of ZAMS Stars . ... There are currently several groups involved in the studies of the rotation periods of PMS stars. ... Overall, there are about 100 rotation periods known for PMS stars. ... Furthermore, the stars with periods near 8 days also tend to have infrared excesses which can be interpreted as arising from disks. ... In the first interpretation, the gap occurs because locking mechanism holds stars at a eight day rotation period. ...

... Among these objects, the newly discovered Kuiper Belt Objects (KBO's) outside the orbit of planet Neptune (also known as Trans-Neptunian Objects) are of particular interest, but the meeting was also concerned with distant comets and some of the small moons of the outer planets. ... The Kuiper Belt is a zone outside the orbits of Neptune and Pluto in which icy solar system objects were expected to be present; the first was found in 1992. ... ESO Press Photo 41/98 . ... Send comments to <ips@eso.org> ...

We determine an absolute calibration for the Multiband Imaging Photometer for Spitzer 24 ЮМm band and recommend adjustments to the published calibrations for Two Micron All Sky Survey (2MASS), Infrared Array Camera (IRAC), and IRAS photometry to put them on the same scale. ... We provide absolutely calibrated SEDs for a standard zero magnitude A star and for the Sun to allow extending this work to any other IR photometric system. ... ADS Citation Query . ... citations vs. year [year,citations] . ...

Next: Anatomy of a decline Up: Physical Characteristics Previous: Pulsations . The most obvious and spectacular properties of RCB stars are their dramatic fading events. ... The ratio between the characteristic interval between fades, and the typical pulsation period of RCBs implies that a decline occurs about once every twenty pulsation cycles. ... Next: Anatomy of a decline Up: Physical Characteristics Previous: Pulsations Simon Jeffery . ...

. Ce le sti al ca le nd ar . Satellites of Mars . (Orbital, physical and photometric data) . Name . Orbital Period . Semimajor Axis 1 . Mass . Radius . Magnitude 2 . d . ? 10 3 km . 1/Planet . km . m . I Phobos . 0.32 . 9.38 . 1.65 ? 10 -8 . 13.4 ? 11.2 ? 9.2 . 11.4 . II Deimos . 1.26 . 23.46 . 3.71 ? 10 -9 . 7.5 ? 6.1 ? 5.2 . 12.5 . 1 Half the length of the major axis of the ellipse; a standard element used to describe an elliptical orbit. 2 This is the mean opposition magnitude of the satellite.