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- Tau_Geminorum abstract "Tau Geminorum (τ Gem) is a star in the northern zodiac constellation of Gemini. It has the apparent visual magnitude of +4.42, making it visible to the naked eye under suitably good seeing conditions. This star is close enough to the Earth that its distance can be measured using the parallax technique, which yields a value of roughly 321 light-years (98 parsecs).It is an evolved giant star of the spectral type K2 III, meaning it is probably fusing carbon and oxygen in its core to form iron and nickel.[citation needed] It has double the mass of the Sun and has expanded to 27 times the Sun's radius. Tau Geminorum is radiating 224 as much luminosity as the Sun from its expanded outer atmosphere at an effective temperature of 4,528 K, giving it the characteristic orange-hued glow of a K-type star. It appears to be rotating slowly with a projected rotational velocity of 5.8 km s–1.This star has a brown dwarf companion Tau Geminorum b, whose mass is 18.1 Jupiter masses, and which was discovered in 2004 by Mitchell et al., who also discovered Nu Ophiuchi b at the same time. This brown dwarf takes 305 days or 0.84 years or 26.4 megaseconds to revolve around Tau Gem.".
- Tau_Geminorum thumbnail Gemini_IAU.svg?width=300.
- Tau_Geminorum wikiPageExternalLink sim-id?protocol=html&Ident=Tau+Gem&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- Tau_Geminorum wikiPageID "14827806".
- Tau_Geminorum wikiPageRevisionID "593129250".
- Tau_Geminorum appmagV "+4.42".
- Tau_Geminorum bV "+1.26".
- Tau_Geminorum class "K2 III".
- Tau_Geminorum constell Gemini_(constellation).
- Tau_Geminorum date "March 2012".
- Tau_Geminorum eccentricity "?".
- Tau_Geminorum epoch Epoch_(astronomy).
- Tau_Geminorum exoplanet "b".
- Tau_Geminorum gravity "2.22".
- Tau_Geminorum hasPhotoCollection Tau_Geminorum.
- Tau_Geminorum luminosity "224".
- Tau_Geminorum mass "1.98".
- Tau_Geminorum mass "≥18.1".
- Tau_Geminorum metalFe "+0.14".
- Tau_Geminorum pError "0.25".
- Tau_Geminorum parallax "10.16".
- Tau_Geminorum period "305".
- Tau_Geminorum periodUnit "day".
- Tau_Geminorum propMoDec "-48.92".
- Tau_Geminorum propMoRa "-31.21".
- Tau_Geminorum radialV "+21.83".
- Tau_Geminorum radius "27".
- Tau_Geminorum reason "A brown dwarf has a non-zero bond albedo so it should be showing an illuminated crescent".
- Tau_Geminorum rotationalVelocity "5.8".
- Tau_Geminorum semimajor "≥0.88".
- Tau_Geminorum temperature "4528".
- Tau_Geminorum uB "+1.41".
- Tau_Geminorum subject Category:Bayer_objects.
- Tau_Geminorum subject Category:Brown_dwarfs.
- Tau_Geminorum subject Category:Flamsteed_objects.
- Tau_Geminorum subject Category:Gemini_(constellation).
- Tau_Geminorum subject Category:Henry_Draper_Catalogue_objects.
- Tau_Geminorum subject Category:Hipparcos_objects.
- Tau_Geminorum subject Category:K-type_giants.
- Tau_Geminorum type Animal100015388.
- Tau_Geminorum type BayerObjects.
- Tau_Geminorum type FlamsteedObjects.
- Tau_Geminorum type Giant101323781.
- Tau_Geminorum type HIPObjects.
- Tau_Geminorum type HenryDraperCatalogueObjects.
- Tau_Geminorum type K-typeGiants.
- Tau_Geminorum type LivingThing100004258.
- Tau_Geminorum type Object100002684.
- Tau_Geminorum type Organism100004475.
- Tau_Geminorum type PhysicalEntity100001930.
- Tau_Geminorum type Whole100003553.
- Tau_Geminorum type CelestialBody.
- Tau_Geminorum type Star.
- Tau_Geminorum type PhysicalBody.
- Tau_Geminorum comment "Tau Geminorum (τ Gem) is a star in the northern zodiac constellation of Gemini. It has the apparent visual magnitude of +4.42, making it visible to the naked eye under suitably good seeing conditions.".
- Tau_Geminorum label "Tau Geminorum".
- Tau_Geminorum label "Tau Geminorum".
- Tau_Geminorum label "Tau Geminorum".
- Tau_Geminorum label "五諸侯二 (井宿)".
- Tau_Geminorum sameAs Tau_Geminorum.
- Tau_Geminorum sameAs Tau_Geminorum.
- Tau_Geminorum sameAs Tau_Geminorum.
- Tau_Geminorum sameAs m.03gz94b.
- Tau_Geminorum sameAs Q940511.
- Tau_Geminorum sameAs Q940511.
- Tau_Geminorum sameAs Tau_Geminorum.
- Tau_Geminorum wasDerivedFrom Tau_Geminorum?oldid=593129250.
- Tau_Geminorum depiction Gemini_IAU.svg.
- Tau_Geminorum isPrimaryTopicOf Tau_Geminorum.
- Tau_Geminorum name "Tau Geminorum".
