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HD 88008


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Long-term photometric variations in DH Leonis
The long-term photometric behavior of the triple system DH Leonis hasbeen studied using the UBV data obtained between 1976 and 1990. Theamplitude of the long-term brightness change is about 0.45 magnitudes inV, with an estimated cycle length of 8 to 14 yr, whereas the amplitudeof the rotational modulation is about 0.15 magnitudes. In terms ofstarspots this means that the variation of spot coverage with longitude(and latitude) at a given time is less than the variation for the wholestar over longer intervals of time. During minimum light the effectivespotted area covers about 60 percent of the surface. The average B - Vcolor of the system is correlated with the average brightness; thechange in B - V corresponds to a change of about two spectral subtypes.It is found that there is more blue light in the system, especiallyduring spot maximum, than expected from the spectral types of thecomponents. Possible causes are discussed. The position of thecomponents in the HR diagram is also discussed.

Colors, luminosities, and motions of the nearer G-type stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1964AJ.....69..570E&db_key=AST

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관측 및 측정 데이터

별자리:사자자리
적경:10h09m20.12s
적위:+24°32'39.0"
가시등급:8.485
거리:82.237 파섹
적경상의 고유운동:-142.9
적위상의 고유운동:-112.8
B-T magnitude:9.385
V-T magnitude:8.56

천체목록:
일반명   (Edit)
HD 1989HD 88008
TYCHO-2 2000TYC 1968-92-1
USNO-A2.0USNO-A2 1125-06055015
HIPHIP 49749

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