Home     To Survive in the Universe    
Services
    Why to Inhabit     Top Contributors     Astro Photo     The Collection     Forum     Blog New!     FAQ     Login  
→ Adopt this star  

TYC 2826-1594-1


Contents

Images

Upload your image

DSS Images   Other Images


Related articles

H-alpha photometry of dwarf K and M stars - Chromospheric activity
H-alpha photometry of 118 K and M dwarfs are presented, with H-alphaequivalent width measures accurate to about 0.05 A. The data arecombined with the spectroscopic surveys of Stauffer and Hartmann (1986)and Fleming et al. (1988) to study the main features of thechromospheric activity versus mass relation for low-mass stars. An upperbound to the H-alpha equivalent width is found to be a function of themass relation (R-I). H-alpha luminosities and surface fluxes arecalculated for active stars, showing that both quantities generallydecline with R-I. The upper bound to the fraction of a star's bolometricluminosity, however, is independent of R-I. The results suggest that thechromospheres of most dMe stars with R-I less than 1.1 are in anactivity-saturated state. Also, H-alpha variability, probably due toflares, is detected in several stars.

UBVRI photoelectric photometry of nearby stars. II
A second set of UBVRI photometry results for nearby stars of Gliese's(1969) catalog and its supplements, including in this case some multiplesystems, are presented. Most of the observations were carried outbetween July 1984 and December 1985 at Calar Alto with the 1.23-m CentroAstronomico Hispano-Aleman telescope and the 1.52-m ObservatorioAstronomico Nacional telescope. The number of observations of programand standard stars for the six runs and the final results for 60 starsare presented.

Liste et classification d'étoiles nouvelles M,S,C et à émission
Not Available

Submit a new article


Related links

  • - No Links Found -
Submit a new link


Member of following groups:


Observation and Astrometry data

Constellation:Ανδρομέδα
Right ascension:01h38m59.13s
Declination:+43°58'04.3"
Apparent magnitude:9.624
Proper motion RA:-3.5
Proper motion Dec:-5
B-T magnitude:12.002
V-T magnitude:9.821

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 2826-1594-1
USNO-A2.0USNO-A2 1275-00979079
HIPHIP 7690

→ Request more catalogs and designations from VizieR