Pulkovo NEO Page . ... NEA Accuracy Estimation . ... The estimation of accuracy of the current CCD observations of asteroids and comets is constantly performed at Pulkovo Observatory. ... The (O-C) values, so called "Observed" minus "Calculated" positions, characterize numerically the observations of any observatory, both professional and amateur, during a short period (one or several close nights). ... So the (O-C) values for these objects nearly entirely define the errors of observations. ...

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• Pulkovo NEO Page: Apparent Close Approaches to the Stars
• Pulkovo NEO Page: Ephemeris Support
• Pulkovo NEO Page: Estimation of Observational Accuracy

The close position of main satellite and subsatellite (distance between them about 1000 km) and using the similar sets of Faraday cups (VDP and VDP-S) with high resolution measurements (up to 16 Hz for the main satellite and up to 10 Hz for the subsatellite) allow us to determine the small-scale variations of the magnetopause shape and position and to estimate the velocity of the magnetopause motion. ... Two point observation of the magnetopause motion: the INTERBALL project. ...

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• Satellite position in the SE and GSM coordinate systems
• STDA files
• Lagrangian Points

The software package ERA (Ephemerides for Research in Astronomy) is a problem-oriented software system for solving heterogeneous calculating tasks of Ephemeris and Dynamical Astronomy. The package makes it possible to produce ephemeris calculations needed for both planning various observational programs and processing the resulting observations. ... The system includes packages of processing the position observations by both the Least Squares Method and by Kalman filtering. ...

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• AY2016 (contents)
• AY2012 (contents)
• AY2014 (contents)

... The HST uses an onboard model of its orbit to perform in real-time various control functions relating to spacecraft operations and observation support. ... New coefficients for the ephemeris are updated every other day, and are archived as FITS keywords for each HST observation data set. Using these coefficients,an observer can perform a variety of calibration and characterization calculations relating to the orbital position and velocity of the telescope. ...

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• Modern CCD Observations of Moving Celestial Objects: Algorithms and Software
• ADASS 2003 Conference Proceedings

... Figure 8: Can you detect the motion of the near-Earth asteroid 2000PH against the background stars during its close approach to Earth around 27 July 2004? ... Down) observed and imaged the unusual near-Earth asteroid 2000PH during its close approach to the Earth around 27 July 2004. The observations were carried out remotely using the new 2m aperture Faulkes telescope situated on the 10,000-foot summit of Haleakala, on the island of Maui in Hawaii. ...

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• Terry Mosely's Bulletins
• Observations with the Faulkes Telescope North
• First CCD Observations of Asteroids from Armagh

Natural Satellites Service. ... Apparent Encounters . of the Tycho-2 Catalogue stars and the main natural planetary satellites . ... Suggestions . ... Here we present the precalculated circumstances of the apparent encounters of the stars of the Tycho-2 Catalogue with the main satellites of Saturn (S1-S8) for the period from November 2004 to February 2010, and with the Galilean satellites of Jupiter for the period from November 2004 to October 2010. ...

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• Data bases of Natural Satellites. Documentation. Structure
• IMCCE-SAI: Natural Satellites Data Center. Observations
• IMCCE-SAI: Natural Satellites Service. Ephemerides. Satellites lointains de

Next: THE SCHED INPUT FILES Up: INFORMATION AND ADVICE ON Previous: Configuration Studies Contents . ... The NAIF software package from JPL is called to read the spice files and calculate positions. The NAIF software significantly increases the size of a SCHED distribution, and the satellite tracking capability is unlikely to be needed outside the AOC. ... To use the tracking capability, a Satellite Initialization section needs to be included in the main input file. ...

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• Archive of VLBI Observations Majordomo List
• The Local Volume HI Survey (LVHIS)

... Advises . Contact Advises . As an advise for amateurs we would like to underline: if it's possible, try to observe 3 asteroid positions per night and do not neglect to observe the Numbered Minor Planets in your telescope field of view as a "by product" of your observational programs. ... We think such estimations ought to be produced every morning after CCD observations of the moving celestial objects by observer himself. ...

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... News Latest News News Archive Newsletter Quarterly Status Report . ... Data Analysis SAS News What is SAS? ... Archive, Pipeline & Catalogues XMM-Newton Science Archive Pipeline Processing System Observation Data Status Time Correlation Fix Serendipitous Source Catalogue OM Serendipitous Source Catalogue Slew Survey Catalogue Latest Slew Results Browsing Interface for RGS Data Live Radiation Monitor Plots Radiation Monitor Files . ... Please refresh your browser to update the satellite position. ...

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• Generation from In-Orbit Data
• Procedure
• Description

... Time calculated from Fermi GBM Trigger Time = 14:12:08.67 ( Connaughton, GCN 9230 ). 1% coincident with our start zero image time. 3x3 degrees around Swift XRT position . ... SUBJECT: GRB 090424 : MASTER-Net prompt optical limit DATE: 09/04/25 20:29:42 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski ... Our observations results: ---------------------------------------------------------------------- Fermi GRB Trigg.* ...

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Next: Primary Catalog Up: Observations and Analysis Previous: Source Positions . ... This energy selection allows direct comparison with previous EGRET, COS-B and SAS-2 results. ... The energy spectra shown in the catalog are taken largely from previous EGRET publications (or those currently in the publication process), which discuss the details of source identifications, time variability, and energy spectra. ... Such sources are identified in the catalog. ...

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• Source Positions
• Moving objects
• VLA observations

Instrument Science Report OSG-003 Transforming Non-COSTAR Aperture Positions to the New Vehicle Reference M. Lallo, C. Cox. ... In support of the plan to perform close-out calibrations using the GHRS and FOC without the COSTAR DOB, we have transformed these "Non-COSTAR" aperture positions of the affected SIs into the current frame. FOS non-COSTAR positions were also calculated to support any possible contingencies. ... The calculated minus predicted is 0.4'' for GHRS. ...

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• Using Multiple FP-POS positions with COS observations
• Correcting ETC Calculations of CCD Spectral Observations for CTE Effects
• WFPC2 PSF Subtraction

International Workshop NAROO-GAIA "A new reduction of old observations in the Gaia era", Paris Observatory, June 20-22, 2012 Registration of participants of Workshop NAROO-GAIA Before the first meeting OPENING OF THE WORKSHOP The natural planetary satellites are observed since centuries in order to understand their dynamics and their evolution. ... Science results, reports, data mining. ... L. Beauvalet: Strong need of a new reduction of Pluto's old observations W.Thuillot: very important. ...

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• http://www.puldb.ru/nikolaev_2011/PUB_NIKOLAEV_2011/plates2.pdf
• Pulkovo Database of Observations of Visual Double Stars
• page_22

Arecibo Galaxy Environment Survey (AGES) The M74 group is a gas-rich galaxy group located at roughly 10 Mpc and is similar in makeup to the Local Group. M74 dominates the surrounding region and is accompanied by several dwarf galaxies, some of which are star-forming. ... We have decided upon a drift mapping approach to scan the entire region. We have defined 5 constant declination scans 5 in length, separated by approximately one full ALFA footprint. ... START TIME (AST) . END TIME (AST) . ...

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• ON/OFF (Position Switching)
• AO Spectral Line Position Search Database.
• glonass satellites

Computer Ephemeris for 2016 from DE200/LE200. Longitude of central meridian of Uranus. ...

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• Central meridian positions for physical observations of Saturn for Computer
• Central meridian positions for physical observations of Neptune for Computer
• Contents of Computer Ephemeris for 2014 (DE200/LE200).

... With enough velocity, a spacecraft can break loose from the Earth's gravity and enter an orbit around the Sun, like that of a planet. If it then orbits the Sun with the same period as the Earth--one year--it may keep a fixed position relative to Earth. ... If the distance is just right--about 4 times the distance to the Moon or 1/100 the distance to the Sun--the spacecraft, too, will need just one year to go around the Sun, and will keep its position between the Sun and the Earth. ...

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• The Wind Spacecraft
• Corrected Geomagnetic Coordinates
• Kepler and His Laws

Astronomy Terms - To Help You Study The Universe . Articles | ... Learning about the universe, or the study of astronomy, can be fun for the individual or for the whole family. ... Learning a few simple terms will help you with this fascinating study. ... You will use a telescope or binoculars for your observation of the sky at night. ... Celestial Terms . ... Meteor or a shooting star – the light caused when a meteoroid burns up in Earth's . ... www.astronomy.net . About Astronomy Net | ...

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• Observation Report On Mars And ... - an Astronomy Net Observation_reports Forum

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Position of Central Source (J2000) : ( 23 01 08.3, 58 52 44.6 ) . ... Description: half shell, bright central AXP . ... Radio Images Page . ... Exposure uf . ... 4626 . ... Exposure uf Exposure time of unfiltered event file . Exposure f Exposure time of filtered event file . ... Central pulsar not in field. ... Event 2 FITS File . ... see fit detail page for more about the fit. see chandra spectrum page for region used. ...

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• Chandra Images for G330.2+01.0
• Chandra Images for SNRJ 0540.1-6919
• Chandra Images for SNR J0526.0-6604

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• POLIMODEL (V2.00) --- November00 --- POLIMODEL (V2.00)
• ESO - ALMA
• ESO Views of Earth-Approaching Asteroid Toutatis | ESO

... The Russian TESIS (FIAN) Solar Observatory has transmitted observations back to Earth of the solar eclipse made on July 22nd, 2009. ... On the first occasion, the satellite passed through the eclipse area at 04:30 Moscow time, making it the first on our planet to see the shadow of the Moon, which was still in space and was only approaching the Earth ( film 1.2 MB, wmv format ). ... The first Moon passage over the solar disk (00:30 UT) (Movie wmv; 1.2 MB) . ...

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• Project's diary