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HD 186


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A survey of ultraviolet objects
An all-sky survey of ultraviolet objects is presented together with astatistical analysis that leads to the conclusion that there is asignificantly higher population of hot subdwarfs lying below themain-sequence than hitherto thought. The distribution of all ultravioletobjects, main sequence ultraviolet objects, and MK unclassifiedultraviolet objects are shown in galactic coordinates, and the absolutemagnitudes and color-color diagrams for these groups are presented.Scale heights are derived, giving values similar to planetary nebulaefor the hottest groups.

Optical observations of ultraviolet objects. II - Classification and photometry /l = 0 to 145 deg/
UBV photometry and MK spectral classification are presented for a sampleof stars originally selected as UV objects from satellite photometrywith the S2/68 experiment. Although most stars of the sample arespectroscopically normal, a number of hot, subluminous stars were alsofound. Radial velocities are given for some of the stars observed. It isproposed that the majority of the apparently normal early B stars athigh galactic latitudes which are not runaway stars are subluminousdisc-population analogues of horizontal branch B stars of Population II.

Spectral classification of ultraviolet objects.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978A&A....66L...9B&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Andromeda
Ascensione retta:00h06m47.95s
Declinazione:+44°36'46.2"
Magnitudine apparente:8.985
Moto proprio RA:-4.3
Moto proprio Dec:-6.5
B-T magnitude:8.829
V-T magnitude:8.973

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 186
TYCHO-2 2000TYC 2793-1324-1
USNO-A2.0USNO-A2 1275-00071848
HIPHIP 559

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