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Medium-Resolution Stellar Spectra in the L Band from 2400 to 3000 cm-1 (3.3 to 4.2 Microns)
We present a brief atlas of L-band (3.3-4.2 μm) spectra for 42 starsplus the Sun and a sunspot observed at a resolving power of R~3000. Thiscontribution is intended to supplement our previous K-band, H-band, andJ-band spectral atlases. The L-band data, which cover some or all of the2400 to 3000 cm-1 (3.3-4.2 μm) region, are mainly forluminous late-type stars. In reducing these data, special care has beentaken to remove telluric features, especially water vapor. We identifytemperature- and luminosity-sensitive atomic and molecular indices toaid in the classification of stellar spectra in the L band. The data areavailable electronically.
| Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
| Observations of Double Stars. XVIII.
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| Interstellar Extinction in the Dark Cloud Khavtassi 217 IN Cassiopeia
The Vilnius photometric system has been applied for the investigation ofinterstellar extinction in the area of dark cloud Khavtassi 217 inCassiopeia. On the ground of photoelectric photometry of 152 stars,their photometric spectral types, absolute magnitudes, color excesses,interstellar extinctions and distances were determined. The area isdivided into two regions with different extinction versus distance run.Distances of the dark clouds are determined.
| Double Star Measurements Made at Nice
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102..643M&db_key=AST
| Mesures d'Etoiles Doubles faites à l'Observatoire de Paris
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Cassiopea |
| Ascensione retta: | 00h58m39.94s |
| Declinazione: | +67°26'24.6" |
| Magnitudine apparente: | 8.555 |
| Distanza: | 173.01 parsec |
| Moto proprio RA: | 22.4 |
| Moto proprio Dec: | -14.1 |
| B-T magnitude: | 8.977 |
| V-T magnitude: | 8.59 |
Cataloghi e designazioni:
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INHABITED SKY
