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Classification of Spectra from the Infrared Space Observatory PHT-S Database
We have classified over 1500 infrared spectra obtained with the PHT-Sspectrometer aboard the Infrared Space Observatory according to thesystem developed for the Short Wavelength Spectrometer (SWS) spectra byKraemer et al. The majority of these spectra contribute to subclassesthat are either underrepresented in the SWS spectral database or containsources that are too faint, such as M dwarfs, to have been observed byeither the SWS or the Infrared Astronomical Satellite Low ResolutionSpectrometer. There is strong overall agreement about the chemistry ofobjects observed with both instruments. Discrepancies can usually betraced to the different wavelength ranges and sensitivities of theinstruments. Finally, a large subset of the observations (~=250 spectra)exhibit a featureless, red continuum that is consistent with emissionfrom zodiacal dust and suggest directions for further analysis of thisserendipitous measurement of the zodiacal background.Based on observations with the Infrared Space Observatory (ISO), aEuropean Space Agency (ESA) project with instruments funded by ESAMember States (especially the Principle Investigator countries: France,Germany, Netherlands, and United Kingdom) and with the participation ofthe Institute of Space and Astronautical Science (ISAS) and the NationalAeronautics and Space Administration (NASA).
| Hipparcos red stars in the HpV_T2 and V I_C systems
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The Henry Draper Extension Charts (HDEC), published in the form offinding charts, provide spectral classification for some 87000 starsmostly between 10th and 11th magnitude. This data, being highlyvaluable, as yet was practically unusable for modern computer-basedastronomy. An earlier pilot project (Roeser et al. 1991) demonstrated apossibility to convert this into a star catalogue, using measurements ofcartesian coordinates of stars on the charts and positions of theAstrographic Catalogue (AC) for subsequent identification. We presenthere a final HDEC catalogue comprising accurate positions, propermotions, magnitudes and spectral classes for 86933 stars of the HenryDraper Extension Charts.
| Dearborn catalog of faint red stars : titanium oxide stars in zones -4. 5[degrees] to +13.5[degrees]
This portion of the Dearborn Survey of Faint Red stars deals with thosestars showing titanium oxide (M stars) in zones -4.5 degrees to 13.5degrees declination. Part 1A of the Annals (pages 13 - 54) contains thecatalog (Dearborn Catalog of Faint Red stars, objects 1 to 8151, whilePart 2 (pages 55-66) has the discussion.
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Datos observacionales y astrométricos
| Constelación: | Hércules |
| Ascensión Recta: | 18h26m50.51s |
| Declinación: | +23°30'16.7" |
| Magnitud Aparente: | 9.85 |
| Movimiento Propio en Ascensión Recta: | -0.3 |
| Movimiento Propio en Declinación: | -1.1 |
| B-T magnitude: | 12.208 |
| V-T magnitude: | 10.045 |
Catálogos y designaciones:
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