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HD 27883

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Distances to Cataclysmic Variables using Linear Polarimetry A model independent method is proposed for estimating the distances toCataclysmic Variables (CVs) using linear polarimetry. A polarizationversus distance relation is constructed by measuring the linearpolarization of field stars along the line of sight to the CV. Thedistance of the CV can be estimated by measuring its polarization and byassuming its intrinsic polarization is negligible in relation to theinterstellar polarization, an assumption that appears to be true in mostcases. We show that an accuracy of 6% is achievable by estimating thedistance to VW Hyi to be 82 +- 5 pc. Rough distance estimates of otherCVs with measured polarization are also given. (SECTION: Stars)
UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue. Not Available
UBV(RI)c photometry of some standard sequences in the Harvard F regions and in the Magellanic Clouds Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1988MNRAS.231.1047M&db_key=AST
Interstellar polarization from observations of A and F stars in high and intermediate galactic latitudes, and from stars in the Mathewson and Ford polarization catalogue Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1986A&AS...64..487K&db_key=AST
Uvby-beta photometry of stars in the Michigan Spectral Catalogue. I - The Delta Del stars uvby-beta photometry of 74 stars classified as Delta Del in Volume 1 ofthe Michigan Spectral Catalogue is presented. The photometry is inagreement with the spectral classification in that it indicates DeltaDel stars are metal-line-enhanced stars with equivalent-temperaturetypes of A9 + or - 2 subtypes. There is a discrepancy between theluminosity implied from the delta c1 index and the spectralclassification. It is argued that c1 is an inadequateluminosity indicator for some late A- to early F-type stars. Several ofthe Delta Del stars are known Delta Scuti pulsators, and some commentson the metallicism-pulsation relation are made.
Standard Stars for VRI Photometry with S25 Response Photocathodes Not Available

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Osservazione e dati astrometrici

Costellazione:	Mensa
Ascensione retta:	04^h16^m14.66^s
Declinazione:	-75Â°20'39.1"
Magnitudine apparente:	8.453
Distanza:	242.718 parsec
Moto proprio RA:	14.3
Moto proprio Dec:	31.4
B-T magnitude:	8.98
V-T magnitude:	8.497

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 27883
TYCHO-2 2000	TYC 9364-933-1
USNO-A2.0	USNO-A2 0075-00696473
HIP	HIP 19909

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