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HD 15821


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Untwinkling the stars--Part 1
Recently declassified experiments in adaptive optics offer astronomersnew tools that will soon revolutionize ground-based astronomy. It willenable astronomers to attain full diffraction-limited performance. Thetopics covered include the following: laser beacons; the first beacontrails; the discovery of the laser-beacon concept by astronomers;real-time correction; unwanted laser light; beacon requirements; andtilt correction.

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Observation and Astrometry data

Constellation:Baleine
Right ascension:02h32m42.13s
Declination:+01°02'01.3"
Apparent magnitude:7.255
Distance:148.588 parsecs
Proper motion RA:-20.4
Proper motion Dec:0.7
B-T magnitude:8.366
V-T magnitude:7.347

Catalogs and designations:
Proper Names
HD 1989HD 15821
TYCHO-2 2000TYC 46-485-1
USNO-A2.0USNO-A2 0900-00593347
HIPHIP 11831

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