12 Ophiuchi
12 Ophiuchi is a variable star in the constellation Ophiuchus. No companions have yet been detected in orbit around this star, and it remains uncertain whether or not it possesses a dust ring. This star is categorized as a BY Draconis variable, with variable star designation V2133. The variability is attributed to large-scale magnetic activity on the chromosphere (in the form of starspots) combined with a rotational period that moved the active regions into (and out of) the line of sight. This results in low amplitude variability of 12 Ophiuchi's luminosity. The star also appears to display rapid variation in luminosity, possibly due to changes in the starspots. Measurements of the long-term variability show two overlapping cycles of starspot activity (compared to the Sun's single, 11-year
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12 Ophiuchi
12 Ophiuchi is a variable star in the constellation Ophiuchus. No companions have yet been detected in orbit around this star, and it remains uncertain whether or not it possesses a dust ring. This star is categorized as a BY Draconis variable, with variable star designation V2133. The variability is attributed to large-scale magnetic activity on the chromosphere (in the form of starspots) combined with a rotational period that moved the active regions into (and out of) the line of sight. This results in low amplitude variability of 12 Ophiuchi's luminosity. The star also appears to display rapid variation in luminosity, possibly due to changes in the starspots. Measurements of the long-term variability show two overlapping cycles of starspot activity (compared to the Sun's single, 11-year
has abstract
12 Ophiuchi (HD 149661 / HR 61 ...... stel més proper a 12 Ophiuchi.
@ca
12 Ophiuchi (HD 149661 / HR 61 ...... la más cercana a 12 Ophiuchi.
@es
12 Ophiuchi (en abrégé 12 Oph) ...... variable de type BY Draconis.
@fr
12 Ophiuchi is a variable star ...... ve of a relatively young star.
@en
12 Ophiuchi is een oranje dwer ...... ich 31,8 lichtjaar van de zon.
@nl
12 Ophiuchi è una stella varia ...... pale di classe spettrale K2-V.
@it
12 Змееносца (лат. 12 Ophiuchi ...... да видна невооружённым глазом.
@ru
へびつかい座12番星（へびつかいざ12ばんせい、12 Oph ...... 考えられる。太陽にみられるような、活動周期も報告されている。
@ja
蛇夫座12，又名BD-02 4211，HD 149661、S ...... 16h 31m 6.2s，赤緯-2° 28.42′ 40″。
@zh
땅꾼자리 12는 땅꾼자리에 있는 변광성이자 오렌지색 주 ...... 보아, 뱀주인자리 12의 나이는 젊은 것으로 보인다.
@ko
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absmag v
@en
appmag v
ARICNS
b-v
+.82
@en
class
K1 V
@en
constell
epoch
J2000
@en
gravity
@en
luminosity
luminosity bolometric
mass
metal fe
@en
+0.04 ± 0.07
@en
p error
parallax
prop mo dec
–309.63
@en
prop mo ra
+456.04
@en
radial v
–15.4
@en
radius
rotation
1840320.0
rotational velocity
Simbad
HD+149661
@en
temperature
u-b
+0.50
@en
variable
wikiPageUsesTemplate
subject
comment
12 Ophiuchi (HD 149661 / HR 61 ...... stel més proper a 12 Ophiuchi.
@ca
12 Ophiuchi (HD 149661 / HR 61 ...... la más cercana a 12 Ophiuchi.
@es
12 Ophiuchi (en abrégé 12 Oph) ...... variable de type BY Draconis.
@fr
12 Ophiuchi is a variable star ...... d to the Sun's single, 11-year
@en
12 Ophiuchi is een oranje dwer ...... ich 31,8 lichtjaar van de zon.
@nl
12 Ophiuchi è una stella varia ...... pale di classe spettrale K2-V.
@it
12 Змееносца (лат. 12 Ophiuchi ...... да видна невооружённым глазом.
@ru
へびつかい座12番星（へびつかいざ12ばんせい、12 Oph ...... 考えられる。太陽にみられるような、活動周期も報告されている。
@ja
蛇夫座12，又名BD-02 4211，HD 149661、S ...... 16h 31m 6.2s，赤緯-2° 28.42′ 40″。
@zh
땅꾼자리 12는 땅꾼자리에 있는 변광성이자 오렌지색 주 ...... 보아, 뱀주인자리 12의 나이는 젊은 것으로 보인다.
@ko
label
12 Ophiuchi
@ca
12 Ophiuchi
@en
12 Ophiuchi
@es
12 Ophiuchi
@fr
12 Ophiuchi
@it
12 Ophiuchi
@nl
12 Ophiuchi
@sv
12 Змееносца
@ru
へびつかい座12番星
@ja
列肆增四
@zh
sameAs
wasDerivedFrom
isPrimaryTopicOf
name
12 Ophiuchi
@en