About: HR 6806

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HR 6806 is a solitary, orange, main sequence, and Sun-like (K2 V) star located thirty-six light-years away, in the constellation Hercules. The star is smaller than the Sun, with around 79% of the solar mass and radius, and 35% of the solar luminosity. It appears to be rotating slowly with an estimated period of 42 days. In 1988, it was noticed that the star had an inactive chromosphere, with a surface magnetic field strength of only 1,500 G. From 1990 activity in the chromosphere increased, inline with a 16 year stellar cycle previously observed. But, sometime after 1994 (exact date unknown because of a data collection gap between 1995 and 2004) chromospheric activity greatly reduced, and has stayed flat for more than 16 years. As of 2022, the star appears to have entered the equivalent of

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body yago:WikicatSolar-typeStars yago:WikicatStars yago:CelestialBody109239740 yago:NaturalObject100019128 yago:Object100002684 yago:PhysicalEntity100001930 yago:WikicatHRObjects yago:WikicatHenryDraperCatalogueObjects yago:WikicatHipparcosObjects yago:WikicatK-typeMain-sequenceStars album star yago:Star109444100 yago:Whole100003553
rdfs:label	HR 6806 (cs) HR 6806 (es) HR 6806 (en) HR 6806 (ko) HR 6806 (nl) HD 166620 (sv) HD 166620 (zh)
rdfs:comment	HR 6806 je hvězda spektrálního typu K2, vzdálená od Země 36,0 ly. Jedná se o oranžového trpaslíka, který se nachází v souhvězdí Herkula. Radiální rychlost hvězdy činí přibližně 19,5 km/s. (cs) HR 6806은 분광형 K2V의 주계열성으로 단독성이자 오렌지색 왜성이며, 지구에서 허큘리스자리 방향으로 36광년 떨어져 있다. (ko) HR 6806 is een oranje dwerg met een spectraalklasse van K2.V. De ster bevindt zich 36,19 lichtjaar van de zon. (nl) HD 166620 ( eller HR 6806) är en ensam stjärna i det mellersta området av stjärnbilden Herkules. Den har en skenbar magnitud av ca 6,40 och är mycket svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 90,1 mas, beräknas den befinna sig på ett avstånd på ca 36 ljusår (ca 11 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på ca -19 km/s. (sv) HD 166620，又名BD+38 3095，SAO 66700、HR 6806，是一颗恒星，视星等为6.4，位于銀經65.34，銀緯24.21，其B1900.0坐标为赤經18h 6m 18.7s，赤緯+38° 24.21′ 5″。 (zh) HR 6806 is a solitary, orange, main sequence, and Sun-like (K2 V) star located thirty-six light-years away, in the constellation Hercules. The star is smaller than the Sun, with around 79% of the solar mass and radius, and 35% of the solar luminosity. It appears to be rotating slowly with an estimated period of 42 days. In 1988, it was noticed that the star had an inactive chromosphere, with a surface magnetic field strength of only 1,500 G. From 1990 activity in the chromosphere increased, inline with a 16 year stellar cycle previously observed. But, sometime after 1994 (exact date unknown because of a data collection gap between 1995 and 2004) chromospheric activity greatly reduced, and has stayed flat for more than 16 years. As of 2022, the star appears to have entered the equivalent of (en) HR 6806 (HD 166620 / HIP 88972 / GJ 706) es una estrella de magnitud aparente +6,37. Se localiza en la constelación de Hércules 3º al noroeste de θ Herculis.Se encuentra a 36,2 años luz del Sistema Solar, siendo , a poco más de un año luz, la estrella más próxima a HR 6806. La masa de HR 6806 es de aproximadamente 2/3 de la masa solar.Su edad, teniendo en cuenta parámetros cromosféricos, es de 4750 - 5000 millones de años, no muy distinta de la estimada por girocronología —basada en su período de rotación de 42,4 días—, que es de 5300 millones de años. (es)
foaf:name	HR 6806 (en)
dcterms:subject	Bright Star Catalogue objects Durchmusterung objects Gliese and GJ objects Henry Draper Catalogue objects Hercules (constellation) Hipparcos objects K-type main-sequence stars Maunder Minimum Solar-type stars
Wikipage page ID	15059534 (xsd:integer)
Wikipage revision ID	1086360299 (xsd:integer)
Link from a Wikipage to another Wikipage	Bright Star Catalogue objects Durchmusterung objects Gliese and GJ objects Henry Draper Catalogue objects Hercules (constellation) Hipparcos objects K-type main-sequence stars Maunder Minimum Solar-type stars Maunder minimum Gauss (unit) Main sequence Chromosphere Hercules (constellation) Astronomical Unit Sub-brown dwarf Stellar magnetic field Sun-like Projected separation
Link from a Wikipage to an external page	http://nstars.nau.edu/index.cfm%3Ffuseaction=singleSearch.systemID&SystemID=1809p3827
sameAs	HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806 HR 6806
dbp:wikiPageUsesTemplate	dbt:As_of dbt:Convert dbt:Dead_link dbt:Reflist dbt:Short_description dbt:Starbox_astrometry dbt:Starbox_begin dbt:Starbox_catalog dbt:Starbox_character dbt:Starbox_detail dbt:Starbox_end dbt:Starbox_observe dbt:Starbox_reference dbt:Stars_of_Hercules dbt:Val dbt:DEC dbt:Odlist dbt:RA dbt:ARICNS_link
absmag v	6.170000 (xsd:double)
age gyr	5.800000 (xsd:double)
appmag v	6.400000 (xsd:double)

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