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HD 27611

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Research Note Hipparcos photometry: The least variable stars The data known as the Hipparcos Photometry obtained with the Hipparcossatellite have been investigated to find those stars which are leastvariable. Such stars are excellent candidates to serve as standards forphotometric systems. Their spectral types suggest in which parts of theHR diagrams stars are most constant. In some cases these values stronglyindicate that previous ground based studies claiming photometricvariability are incorrect or that the level of stellar activity haschanged. Table 2 is only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/367/297
Large and kinematically unbiased samples of G- and K-type stars. IV - Evolved stars of the old disk population Modified Stromgren and (R,I) photometry, along with DDO and Genevaphotometry, are presented for a complete sample of evolved old-disk Gand K giants in the Bright Star Catalogue. Stars with ages of between1.5 x 10 to the 9th and 10 to the 10th yr are found to have anear-normal distribution of heavy element abundances, centered on anFe/H abundance ratio of -0.1 dex. The old disk clusters NGC 3680 and IC4651 contain red-straggler young-disk giants that are probablycontemporaries of the blue stragglers in the clusters.
Large and kinematically unbiased samples of G- and K-type stars. II - Observations of evolved stars in the Bright Star sample. III - Evolved young disk stars in the Bright Star sample Four color and RI observations were obtained for a large sample ofG-type and K-type stars in the Bright Star Catalogue. Data are firstpresented for 110 evolved stars. Photometry of evolved young diskpopulation stars have then been calibrated for luminosity, reddening,and metallicity on the basis of results for members of the Hyades andSirius superclusters. New DDO results are given for 120 stars.
Visual multiples. VIII - 1000 MK types A total of 1000 new classifications are given for stars brighter than B= 8.0 mag in the Aitken double star catalog. The classificationssupplement 865 classifications obtained in 1981 and 1984. Among thenewly discovered stars are 12 new Ap stars, eight Lambda Bootis stars,one Ba II star, and 60 Am stars. A detailed list of the newclassifications is given.
Photoelectric radial velocities. V. 69 southern HR stars. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972MNRAS.155..449G&db_key=AST
The Kreinin-Murri Method for Absolute Determination of Equatorial-Star Declinations. Not Available
Strong-Cyanogen Stars: Photometry and Kinematics Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1971ApJ...165..561J&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Eridano
Ascensione retta:	04^h21^m27.10^s
Declinazione:	-00Â°05'53.0"
Magnitudine apparente:	5.86
Distanza:	143.266 parsec
Moto proprio RA:	-18.7
Moto proprio Dec:	-126.3
B-T magnitude:	7.598
V-T magnitude:	6.007

Cataloghi e designazioni:

Nomi esatti
HD 1989	HD 27611
TYCHO-2 2000	TYC 4727-2098-1
USNO-A2.0	USNO-A2 0825-01002759
BSC 1991	HR 1366
HIP	HIP 20341

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