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HD 121699

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HD 121447: an ellipsoidal-variable barium star? Orbital elements are derived from CORAVEL measurements for the coolestknown barium star HD 121447 (K7IIIBa5). The orbital period ofP_orb_=185.7d is the second shortest among barium stars. A photometricmonitoring reveals small amplitude variations with a period P_orb_/2.The phase of the variations and the stability of the color indices arecompatible with the system being an ellipsoidal variable. If the redgiant is located on the first giant branch, the analysis of the lightcurve and the orbital elements yield the following parameters for thesystem: 1.5==i >=48deg,53=
Longterm Photometry of Variables at ESO - Part Two - the Second Data Catalogue 1986-1990 Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102...79S&db_key=AST
Long-term photometry of variables at ESO. I - The first data catalogue (1982-1986) This paper presents the catalog of photometric data in the Stromgrensystem obtained during the first four years (October 1982 - September1986) of the Long-Term Photometry of Variables (LTPV) program at ESO.The data are available in computer-readable form.
E. W. Fick Observatory stellar radial velocity measurements. I - 1976-1984 Stellar radial velocity observations made with the large vacuumhigh-dispersion photoelectric radial velocity spectrometer at FickObservatory are reported. This includes nearly 2000 late-type starsobserved during 585 nights. Gradual modifications to this instrumentover its first eight years of operation have reduced the observationalerror for high-quality dip observations to + or - 0.8 km/s.
Radial velocities of southern stars obtained with the photoelectric scanner CORAVEL. III - 790 late-type bright stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1985A&AS...59...15A&db_key=AST
Radial velocities of southern HR stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980PASP...92..713B&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:	Su Yilani
Sað Açýklýk:	13^h57^m27.70^s
Yükselim:	-23Â°01'22.0"
Görünürdeki Parlaklýk:	6.14
Uzaklýk:	182.815 parsek
özdevim Sað Açýklýk:	-35.9
özdevim Yükselim:	7.7
B-T magnitude:	7.988
V-T magnitude:	6.296

Kataloglar ve belirtme:

Özgün isimleri	(Edit)
HD 1989	HD 121699
TYCHO-2 2000	TYC 6729-1362-1
USNO-A2.0	USNO-A2 0600-16229547
BSC 1991	HR 5246
HIP	HIP 68177

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