What (who) is Proper Crimbo - definition
Proper Crimbo
SINGLE BY BO' SELECTA!
"Proper Crimbo" is a Christmas song written and performed by the creator of the British comedy programme Bo' Selecta!, Leigh Francis, featuring various artists.
Erik Proper
DUTCH COMPUTER SCIENTIST
Henderik A. Proper; Henderik Alex Proper; H.A. Proper; Proper, Erik; Henderik Proper
Henderik Alex (Erik) Proper (born 22 May 1967) is a Dutch computer scientist, an FNR PEARL Laureate, and a senior research manager within the Computer Science (ITIS) department of the Luxembourg Institute of Science and Technology (LIST).
proper motion
![Proper motion of [[61 Cygni]] in one year intervals.](https://commons.wikimedia.org/wiki/Special:FilePath/61 Cygni Proper Motion.gif?width=200 "Proper motion of [[61 Cygni]] in one year intervals.")
![March equinox]] (center of the sun's position then) at the J2000 epoch, is vector ''V''.<br>In red the diagram adds the components of proper motion across the [[celestial sphere]].<br>An ideal time to measure exactly such a small annual shift is at culmination. The culmination of the star is daily reached when the observer (and earth) passes as shown by the blue arrows "beneath" the star.<br>The positive axes of the two components of its usually annually measured or published shift in proper motion are the exaggerated red arrows, note: the right arrows point to the east horizon. One red annotation is subtly shorter as the cosine of a star resting at 0° declination is 1, so such a star's east or west shift would not need to be multiplied by the cosine of its declination.<br>The proper motion vector is '''''μ''''', ''α'' = [[right ascension]], ''δ'' = [[declination]], ''θ'' = [[position angle]].](https://commons.wikimedia.org/wiki/Special:FilePath/Components of proper motion.svg?width=200 "March equinox]] (center of the sun's position then) at the J2000 epoch, is vector ''V''.<br>In red the diagram adds the components of proper motion across the [[celestial sphere]].<br>An ideal time to measure exactly such a small annual shift is at culmination. The culmination of the star is daily reached when the observer (and earth) passes as shown by the blue arrows \"beneath\" the star.<br>The positive axes of the two components of its usually annually measured or published shift in proper motion are the exaggerated red arrows, note: the right arrows point to the east horizon. One red annotation is subtly shorter as the cosine of a star resting at 0° declination is 1, so such a star's east or west shift would not need to be multiplied by the cosine of its declination.<br>The proper motion vector is '''''μ''''', ''α'' = [[right ascension]], ''δ'' = [[declination]], ''θ'' = [[position angle]].")
ASTRONOMICAL MEASURE OF THE OBSERVED CHANGES IN THE APPARENT PLACES OF STARS IN THE SKY
Proper Motion; Proper motions; Improper motion; Intrinsic motion; Proper-motion; Common proper motion star; Proper motion star; High proper motion star
¦ noun Astronomy the part of the apparent motion of a star due to its actual movement in space relative to the sun.
