Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q17028645> ?p ?o }
Showing triples 1 to 33 of
33
with 100 triples per page.
- Q17028645 subject Q6508.
- Q17028645 subject Q7024164.
- Q17028645 subject Q7139523.
- Q17028645 abstract "The International Astronomical Union at its XVIth General Assembly in Grenoble in 1976, accepted (Resolution No. 1)a whole new consistent set of astronomical constants recommended for reduction of astronomical observations, and for computation of ephemerides. It superseded the IAU's previous recommendations of 1964 (see IAU (1964) System of Astronomical Constants), became in effect in the Astronomical Almanac from 1984 onward, and remained in use until the introduction of the IAU (2009) System of Astronomical Constants. In 1994 the IAU recognized that the parameters became outdated, but retained the 1976 set for sake of continuity, but also recommended to start maintaining a set of "current best estimates" this "sub group for numerical standards" had published a list, which included new constants (like those for relativistic time scales).The system of constants was prepared by Commission 4 on ephemerides led by P. Kenneth Seidelmann (after whom asteroid 3217 Seidelmann is named).At the time, a new standard epoch (J2000.0) was accepted; followed later by a new reference system with fundamental catalogue (FK5), and expressions for precession of the equinoxes,and in 1979 by new expressions for the relation between Universal Time and sidereal time, and in 1979 and 1980 by a theory of nutation. There were no reliable rotation elements for most planets, but a joint working group on Cartographic Coordinates and Rotational Elements was installed to compile recommended values.".
- Q17028645 wikiPageExternalLink 4.
- Q17028645 wikiPageExternalLink iaucom4.org.
- Q17028645 wikiPageWikiLink Q11574.
- Q17028645 wikiPageWikiLink Q120200.
- Q17028645 wikiPageWikiLink Q12457.
- Q17028645 wikiPageWikiLink Q1496380.
- Q17028645 wikiPageWikiLink Q161635.
- Q17028645 wikiPageWikiLink Q1720536.
- Q17028645 wikiPageWikiLink Q1811.
- Q17028645 wikiPageWikiLink Q1815913.
- Q17028645 wikiPageWikiLink Q18373.
- Q17028645 wikiPageWikiLink Q190009.
- Q17028645 wikiPageWikiLink Q191747.
- Q17028645 wikiPageWikiLink Q192854.
- Q17028645 wikiPageWikiLink Q2111.
- Q17028645 wikiPageWikiLink Q2143996.
- Q17028645 wikiPageWikiLink Q2703.
- Q17028645 wikiPageWikiLink Q3556678.
- Q17028645 wikiPageWikiLink Q3863.
- Q17028645 wikiPageWikiLink Q6508.
- Q17028645 wikiPageWikiLink Q685045.
- Q17028645 wikiPageWikiLink Q6867.
- Q17028645 wikiPageWikiLink Q7024164.
- Q17028645 wikiPageWikiLink Q7139523.
- Q17028645 wikiPageWikiLink Q751930.
- Q17028645 wikiPageWikiLink Q83094.
- Q17028645 wikiPageWikiLink Q874572.
- Q17028645 comment "The International Astronomical Union at its XVIth General Assembly in Grenoble in 1976, accepted (Resolution No. 1)a whole new consistent set of astronomical constants recommended for reduction of astronomical observations, and for computation of ephemerides.".
- Q17028645 label "IAU (1976) System of Astronomical Constants".