... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

... The `apparent sub-observer point' is the point on the target body at time t-Tau that is closest to the observer at time t. SUBPT demonstrates the use of the following high-level SPK subroutines: . ... Enter the name for the observing body: sun Enter the name for a target body: earth Enter the number of points to calculate: 24 Enter the beginning UTC time: jul 1 1990 Enter the ending UTC time: jul 2 1990 Planetocentric coordinates for the nearest point on the target body to the observing body (deg). ...

... This area will be denoted "Big Taurus". ... 6 July 2005 Observers: Trish , Desh wapp.20050706.a2004.0000.fits junk wapp.20050706.a2004.0001.fits junk wapp.20050706.a2004.0002.fits junk wapp.20050706.a2004.0003.fits junk wapp.20050706.a2004.0004.fits junk wapp.20050706.a2004.0005.fits junk wapp.20050706.a2004.0006.fits junk wapp.20050706.a2004.0007.fits junk wapp.20050706.a2004.0008.fits junk wapp.20050706.a2004.0009.fits junk wapp.20050706.a2004.0010.fits ...

Institute of Applied Astronomy Russian Academy of Sciences Method of Determining the Orbits of the Small Bodies in the Solar System Based on an Exhaustive Search of Orbital Planes Dmitrii Vavilov, Yurii Medvedev Introduction to the problem: Let we have n 3 positional observations of a body: points in time ( = 1, ) , right ascensions , and declinations . ... Determination of the orbit using the Gauss method of determining orbital elements based on two heliocentric positions and points in time. ...

... The first step to improve the FORS calibration is therefore to obtain data to allow a computation of the illumination correction across the field. ... Another limitation on the calibration accuracy has been the brightness of the Landolt standards which have forced the use of extremely short exposures introducing small but non-negligible shutter-time errors and also resulting in a very small number of useful standards per frame. ...

... The First (Experimental) International Astronomy Olympiad . The following olympic problems were proposed for the participants on the theoretical part: Grades 8-10 . ... Why is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountain top? ... What will an observer looking to the Moon through the telescope see? ... Paper with a drown circle and table of maximal elongations of Mercury and Venus had been done for participants. ...

Next: Equations of condition Up: Extinction and transformation Previous: Extinction and transformation . Bias can also be introduced by improper fitting procedures. For example, the reduction program known as SNOPY, used for many years at La Silla and also at La Palma, uses a simple iterative technique in which some subsets of the parameters are solved for, while others are held fixed; then the ones last solved for are held fixed, while the ones previously fixed are redetermined. ...

... There is a search machine which is valuable if you have a problem which can be described in terms of a few key words. The technical forums will also describe new facilities as they are brought on-line. CA-forum - compact array technical issues . ... The Narrabri Compact Array documentation . ... Search tool ----- This only covers the epping web site. ... 04-Apr-1997 M.J.L. Kesteven (mkesteve@atnf.csiro.au) . ...

... Archives . ... X-ray summer school is on going. ... Recently I went to JSM 2007 and tried to attend talks about (bayesian) change point problems, which frequently appears in time series models, often found in economics. ... Tags: ARCH , Bayesian Block , challenges , change point problem , GARCH , light curves , summer school , X-ray . ... I received another type of changing point problem, defining a peak precisely, from a x-ray school student, who tried bayesian block but said it didn?t work. ...

Once students get the hang of it, they can find and measure the brightness of Delta Cephei in a few minutes. ... of Delta Cephei . ... Oct. ... The following table lists the measurements of Delta Cephei made by one amateur astronomer in autumn 1990. ... 4.0 . ... This activity is a simplified version of one that appeared in Hands-On Astrophysics, a series of activities prepared by the American Association of Variable Star Observers with support from the National Science Foundation. << previous page | ...

... September 19, 1995 . The Small Cloud of Magellan . ... Explanation: Almost unknown to casual observers in the northern hemisphere, the southern sky contains two diffuse wonders known as the Magellanic Clouds . ... The Small Magellanic Cloud (SMC) , pictured here, is about 250,000 light years away and contains a preponderance of young, hot, blue stars indicating it has undergone a recent period of star formation. ... About APOD | ... General astronomy pointers are available. ...

The HyperNews Linux KHG Discussion