Home     Getting Started     To Survive in the Universe    
Inhabited Sky
    News@Sky     Astro Photo     The Collection     Forum     Blog New!     FAQ     Press     Login  

TYC 2697-90-1


Contents

Images

Upload your image

DSS Images   Other Images


Related articles

New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.

CCD measurements of visual double stars made with the 74 cm and 50 cm refractors of the Nice Observatory (2nd series)
We present 619 measurements of 606 visual double stars made by CCDimaging from 1996 to 1999 with the 74 cm and 50 cm refractors of theNice observatory. Angular separation, position angle and magnitudedifference are given. Magnitude differences estimated from CCD imagesare compared with magnitude differences given in the Hipparcos catalog.The residuals in angular separation and position angle are computed forbinaries with known orbit. Table 2 is only available in electronic format the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) orvia http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/378/954

New binary stars (18th series) discovered at Nice
The detection of 150 uncataloged binary systems using 50 cm and 74 cmrefractors at the Nice Observatory is reported. The list of newlydiscovered binaries is presented, including magnitudes, separation,probable periods, the 1900 right ascensions, and the types of the stars.

Submit a new article


Related links

  • - No Links Found -
Submit a new link


Member of following groups:


Observation and Astrometry data

Constellation:Cygne
Right ascension:20h32m06.46s
Declination:+35°58'08.2"
Apparent magnitude:9.338
Proper motion RA:-0.7
Proper motion Dec:-6.4
B-T magnitude:9.458
V-T magnitude:9.348

Catalogs and designations:
Proper Names   (Edit)
TYCHO-2 2000TYC 2697-90-1
USNO-A2.0USNO-A2 1200-15274553
HIPHIP 101313

→ Request more catalogs and designations from VizieR