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TYC 642-116-1 (Jeana Michelle Clausen)


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Speckle Observations of Binary Stars with the WIYN Telescope. II. Relative Astrometry Measures during 1998-2000
Five hundred twelve relative astrometry measures are presented for 253double stars, including 53 double stars discovered by Hipparcos. In 15cases, relative astrometry is reported for the first time for newlyconfirmed pairs. In addition, 20 high-quality nondetections ofcompanions are reported for stars suspected of being nonsingle byHipparcos. Observations were taken using a fast-readout CCD camerasystem at the WIYN 3.5 m telescope at Kitt Peak, Arizona. In comparingthese measures with ephemeris predictions for binary stars with verywell known orbits, we find that the measurement precision is better than3 mas in separation and 1° in position angle per individualobservation. Measurement precision and detection capabilities are fullydiscussed, and confirmed orbital motion is reported in four cases of theHipparcos double star discoveries. The WIYN Observatory is a jointfacility of the University of Wisconsin-Madison, Indiana University,Yale University, and the National Optical Astronomy Observatory.

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Observation and Astrometry data

Constellation:Κριός
Right ascension:02h38m20.30s
Declination:+11°45'32.8"
Apparent magnitude:9.148
Proper motion RA:74.7
Proper motion Dec:11.6
B-T magnitude:10.079
V-T magnitude:9.225

Catalogs and designations:
Proper NamesJeana Michelle Clausen
  (Edit)
TYCHO-2 2000TYC 642-116-1
USNO-A2.0USNO-A2 0975-00593251
HIPHIP 12291

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