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Photometry and Spectrophotometry of the New Variable Star IRAS 20192+3025
We present CCD V and Ic band photometry and spectrophotometry of theobject IRAS 20192+3025. The results of this study indicate the object tobe a red giant of spectral type M4-6 with periodic variations in thelight curve at 20.9 and 40.6 days. The resulting variability type isSRB.

The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars
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.

Micrometric Measures of Double Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974ApJS...28..413V&db_key=AST

Mesures d'etoiles doubles faites AU 38cm de l'Observatoire de Paris.
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Mesures d'étoiles doubles à Meudon
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Observations d'étoiles doubles faites au Pic-du-Midi en spetembre octobre 1957
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Mesures d'étoiles doubles faites à Strasbourg en 1954
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Dades d'Observació i Astrometria

Constel·lació:Cygnus
Ascensió Recta:20h21m19.56s
Declinació:+30°36'03.7"
Magnitud Aparent:8.51
Distancia:288.184 parsecs
Moviment propi RA:9.8
Moviment propi Dec:11.8
B-T magnitude:8.815
V-T magnitude:8.536

Catàlegs i designacions:
Noms Propis
HD 1989HD 334154
TYCHO-2 2000TYC 2672-1711-1
USNO-A2.0USNO-A2 1200-14962069
HIPHIP 100369
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