. Connection between apparent and real orbits of a binary system . P. Descamps . Institut de M canique C leste et de Calcul des ph m rides, Paris, France Abstract: . No abstract Key words: . Very Long Baseline Interferometry (VLBI), celestial mechanics, binary system, apparent orbit, real orbit.

Find Similar Abstracts (with default settings below ) . ... Translate Abstract . ... Bispectrum speckle interferometry and future long-baseline interferometry of the carbon star IRC+10216 . ... 2003SPIE.4838.1055B We present near-infrared (JHK) bispectrum speckle-interferometry monitoring of IRC+10216 obtained with the SAO 6m telescope. The present speckle observations covering baselines up to 6m provide important complementary informations for future long-baseline interferometry. ...

Find Similar Abstracts . ... Relativistic effect of variation in pulsar rotation on an elliptical orbit . Authors: . ... 1, Nov. 1975, p. 19-22. ... Astronomy . ... BINARY STARS, ELLIPTICAL ORBITS, PULSARS, RELATIVISTIC EFFECTS, STELLAR ROTATION, ASTRONOMICAL MODELS, COMPANION STARS, MAGNETIC EFFECTS, PERIODIC VARIATIONS . ... Use: Authors Title Text Query with Keywords Return: Query Results Query Form Database: Astronomy Instrumentation Physics and Geophysics ABSTRACT QUERY USER FEEDBACK HELP ...

Program Number . ... Program Title . ... Abstract . ... ACS Imaging of a Unique Spitzer Field: Morphology of mid-IR Variable Sources . ... ACS survey observations of eight clusters are scheduled for the coming week, together with follow-up NICMOS observations of a supernova detected in previous ACS images. ... The present program is using the HRC on ACS to carry out a snapshot survey of faint Trojan asteroids, which reside at the stable L4 and L5 Lagrange points on Jupiter's orbit. ... Past weeks: . ...

... The distributions of orbits eccenttricities and of angular momenta for the halo stars and the old disk population are considered. The distributions have gaps separating the halo from the disk and dividing the halo population into three groups. ... Рассмотрены распределения звезд гало и старого населения диска по величине эксцентриситета орбит и угового момента. Распределения имеют провалы, отделяющие гало от диска и делящие населения гало на три группы. ...

Arecibo Observatory . ... Arecibo, PR 00612 . ... Taylor, P.A. , and J.L. Margot, Tidal Evolution of Close Binary Asteroid Systems , Celestial Mechanics and Dynamical Astronomy 108 , 315-338, 2010. ... Taylor, P.A. , E.S. Howell, M.C. Nolan, and A.A. Thane, The Shape and Spin Distributions of Near-Earth Asteroids Observed with the Arecibo Radar System , AAS/Division for Planetary Sciences Meeting Abstracts, 44, 2012. ... Patrick A. Taylor, Arecibo Observatory . ...

Databases (NSDC) of the Natural Planetary Satellites. ... NSDC: Database of astrometric observations of Natural Planetary Satellites . ... They are thoroughly looking for observations in different sources, creating their owndatabases which are then mostly inaccessible to other researchers. ... In the file "content" with explications, the reference is given to the data source as well as the bibliographic reference. ... Data sources. ... Why a specific bibliographic database for Natural satellites? ...

XMM-Newton Science Analysis System Page: 1 orbit January 10, 2003 Abstract Create a FITS timeseries \HK-like" le from the ODF Spacecraft Reconstructed Orbit File. ... Both sets of values will be written into a standard OGIP-compliant FITS binary extension table with a TIME column value, derived from a start, stop and sampling interval time, each speci ed by the user. ... StartANDEndNotInODFRange (error) Start AND End times selected not congruent with input ODF obs times. ... 7 Output Files 1. ...

Quasi-Hilda Comet 147P/Kushida-Muramatsu: Another long temporary satellite capture by Jupiter . ... The quasi-Hilda comets (QHCs), being in unstable 3:2 Jovian mean motion resonance, are considered a major cause of temporary satellite capture (TSC) by Jupiter. ... Both these numbers rank 147P as third among long TSC/orbiter events, behind SL9 and 111P. This study also confirms the importance of the QHC region as a dynamical route into and out of Jovian TSC, via the Hill's sphere. ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: The binary central stars of planetary nebulae . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ... We hereby propose to further analyse several systems for which we have extensive datasets, and pursue our study of binary central stars of planetary nebulae, with an emphasis on : . ...

A Unique and Remarkable Binary Pulsar . ... It is the only pulsar known to be orbiting a main sequence Be star and forms the `missing link' in the evolutionary scenario of binary stars. ... Observations made around the time of closest approach of the two stars show changes in the pulsar's dispersion measure, rotation measure and fractional linear polarization on very short timescales. ... The companion star to the pulsar has been monitored at optical and UV wavelengths. ...

... Astro Space Center, Profsojuznaya 84/32, GSP-7, 117997, Moscow, Russia . ... The algorithm allows to work easily with the first and the second derivatives of a visibility function phases and amplitudes. This approach is important for high orbiting Space VLBI data processing. ... where is a measurements of the visibility function and is an approximating function. ... If is a 2-D complex function (a model), the bi-orthogonal approximation is known in VLBI as a self-calibration algorithm. ...

David P. Stern . ... Abstract . This is a systematic attempt to identify and assess near-equatorial, high-eccentricity orbits best suited for studying the Earth's magnetosphere, in particular its most dynamic part, the plasma sheet of the magnetotail. ... On the other hand, an intuitive understanding was developed of the factors which determine the merits of the mission, including long-range factors due to perturbations by the Moon, Sun and the Earth's equatorial bulge. ...

Abstract . A first-generation CMOS Charged Particle Spectrometer chip [1] was designed at JPL for flight on the STRV-2 spacecraft. These devices will collect electron and proton spectra in low Earth orbit as part of an experiment to demonstrate Active Pixel Sensor (APS) technology in space. This paper presents the results of total dose testing on these chips and, where possible, attempts to extend the results to other Active Pixel Sensors. ...

... Астронет | ... 2002: Possible comet around the pulsar PSR1257+12 (courtesy Daniel Fischer) . ... A possible fourth, Saturn-like, planet at ~ 40 UA (Joshi & Rasio 1996, Wolszczan 1996) . ... Planetary system around the pulsar PSR 1257+12 . ... Is there a comet cloud around PSR 1257+12? ... Are there really planets around PSR 1257+12? ... abstract . ... Implications of the PSR 1257+12 Planetary System for Isolated Millisecond Pulsars. ... On the verification of the planetary system around PSR 1257+12 ...

... 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. ...

. Computer Ephemeris. Elements of osculating planetary orbits. Explanations. Each row contains at 0h of Time Dynamical Terrestrial of specified date in system of mean equator and ecliptic J2000.0 the ecliptic osculating elements of heliocentric orbit: inclination of orbital plane (degrees), longitude of ascending node (degrees), argument of perigelion (degrees), semimajor axis (astronomical units), mean motion (degrees per day), eccentricity (dimensionless), mean anomaly (degrees).

... Section 1: Astrometry and Celestial Mechanics Section 2: Solar Physics and Solar-Terrestrial Coupling Section 3: Galaxies and Cosmology Section 4: Physics of the Stars and Interstellar Medium Section 5: Planetary Systems Section 6: The History of Astronomy Section 7: Problems of Astronomical Education . ... Contribution Abstract (max 1100 symbols) . ...

... The experience of determination of the link between radio sources and dynamical reference frames is presented. To obtain this connection we used a series of very long baseline interferometry (VLBI) observations of the spacecraft Phobos-2 and angularly nearby quasars. ... The dynamical reference frame is determined by equator and equinox of these ephemerides. ... References . ... The relative orientation of the radio and dynamical reference frames can be described by a sequence of three rotations . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Solar System . ... Planets . ... This bizarrely shrunken planetary system was found by NASAтАЩs Kepler mission, hence the parent star has been named Kepler-11. ... Planetary scientist and Kepler science team member Jack Lissauer said ?These six planets are mixtures of rock and gases, possibly including water.тАЭ €аNone of these strange new worlds are likely to be home to any form of life; their surface conditions are simply too extreme. ...