HU Tauri (original) (raw)
HD 29365 (HU Tauri) è stella binaria a eclisse, più precisamente una variabile Algol, situata nella costellazione del Toro, di magnitudine apparente 5,86 e assoluta 0,63. Il sistema stellare è situato a circa 329 anni luce dalla Terra.
| Property | Value |
|---|---|
| dbo:abstract | HU Tauri is a tight binary star system in the equatorial constellation of Taurus. It is an eclipsing binary, which means that the member stars periodically eclipse each other every 2.056 days. They have a combined apparent visual magnitude of 5.85, which is bright enough to be dimly visible to the naked eye. During the primary eclipse, the magnitude drops to 6.68, while the secondary eclipse decreases the magnitude to 5.91. The distance to this system, based on parallax measurements, is approximately 414 light years. The variable nature of this system was reported by and R. Knigge in 1960. In 1963, Strohmeier found a period of 2.056297 days, and and associates derived orbital elements for a single-lined spectroscopic binary in 1967. A light curve for the system was assembled by O. Tümer and in 1979. and M. B. K. Sarma in 1980 noted asymmetries in the light curve near the primary eclipse, which suggested gas streams are partially obscuring the light from the primary component. This is a semidetached binary system with an orbital period of 2.0563056 days in an essentially circular orbit. The primary component is presently a B-type main-sequence star with a stellar classification of B8V. It has 4.4 times the mass and 2.6 times the radius of the Sun. The primary eclipse is an occultation in which the secondary completely covers the primary. The cooler and larger secondary star is over-luminous for its mass, indicating that it has evolved away from the main sequence, and is filling its Roche lobe. The spectrum of the system suggests that the secondary is undergoing mass loss, with a gas stream transferring matter to the primary. (en) HD 29365 (HU Tauri) è stella binaria a eclisse, più precisamente una variabile Algol, situata nella costellazione del Toro, di magnitudine apparente 5,86 e assoluta 0,63. Il sistema stellare è situato a circa 329 anni luce dalla Terra. (it) 金牛座HU，又名BD+20 785，HD 29365、SAO 76680、HR 1471，是金牛座的一颗恒星，视星等为5.92，位于銀經177.88，銀緯-17.22，其B1900.0坐标为赤經4h 32m 21.7s，赤緯+20° -17.22′ 2″。 (zh) |
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| dbp:absmagV | 0.830000 (xsd:double) |
| dbp:appmagV | 5.850000 (xsd:double) |
| dbp:bV | −0.019 (en) |
| dbp:class | (en) B8V + G2IV (en) |
| dbp:component | Primary (en) Secondary (en) |
| dbp:constell | dbr:Taurus_(constellation) |
| dbp:eccentricity | 0 (xsd:integer) |
| dbp:epoch | J2000.0 (en) |
| dbp:gravity | 3.480000 (xsd:double) 4.260000 (xsd:double) |
| dbp:k | 59.300000 (xsd:double) 231.200000 (xsd:double) |
| dbp:luminosity | 8.300000 (xsd:double) 123 (xsd:integer) |
| dbp:mass | 1.140000 (xsd:double) 4.430000 (xsd:double) |
| dbp:pError | 0.046600 (xsd:double) |
| dbp:parallax | 7.872200 (xsd:double) |
| dbp:periodUnitless | 177664.80383999998 |
| dbp:propMoDec | −7.198 (en) |
| dbp:propMoRa | −12.899 (en) |
| dbp:radialV | −2.3 (en) |
| dbp:radius | 2.570000 (xsd:double) 4.210000 (xsd:double) |
| dbp:rotationalVelocity | 80 (xsd:integer) |
| dbp:temperature | 5740 (xsd:integer) 12000 (xsd:integer) |
| dbp:variable | Semi-detached Algol variable (en) |
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| dcterms:subject | dbc:Algol_variables dbc:B-type_main-sequence_stars dbc:Bright_Star_Catalogue_objects dbc:Durchmusterung_objects dbc:G-type_subgiants dbc:Henry_Draper_Catalogue_objects dbc:Hipparcos_objects dbc:Objects_with_variable_star_designations dbc:Spectroscopic_binaries dbc:Taurus_(constellation) |
| rdf:type | owl:Thing dbo:Place dbo:Location schema:Place dbo:CelestialBody dbo:Star |
| rdfs:comment | HD 29365 (HU Tauri) è stella binaria a eclisse, più precisamente una variabile Algol, situata nella costellazione del Toro, di magnitudine apparente 5,86 e assoluta 0,63. Il sistema stellare è situato a circa 329 anni luce dalla Terra. (it) 金牛座HU，又名BD+20 785，HD 29365、SAO 76680、HR 1471，是金牛座的一颗恒星，视星等为5.92，位于銀經177.88，銀緯-17.22，其B1900.0坐标为赤經4h 32m 21.7s，赤緯+20° -17.22′ 2″。 (zh) HU Tauri is a tight binary star system in the equatorial constellation of Taurus. It is an eclipsing binary, which means that the member stars periodically eclipse each other every 2.056 days. They have a combined apparent visual magnitude of 5.85, which is bright enough to be dimly visible to the naked eye. During the primary eclipse, the magnitude drops to 6.68, while the secondary eclipse decreases the magnitude to 5.91. The distance to this system, based on parallax measurements, is approximately 414 light years. (en) |
| rdfs:label | HU Tauri (en) HD 29365 (it) 金牛座HU (zh) |
| owl:sameAs | wikidata:HU Tauri dbpedia-it:HU Tauri dbpedia-zh:HU Tauri https://global.dbpedia.org/id/3VVQx |
| prov:wasDerivedFrom | wikipedia-en:HU_Tauri?oldid=1099201800&ns=0 |
| foaf:depiction | wiki-commons:Special:FilePath/HUTauLightCurve.png |
| foaf:isPrimaryTopicOf | wikipedia-en:HU_Tauri |
| is dbo:wikiPageWikiLink of | dbr:List_of_stars_in_Taurus |
| is foaf:primaryTopic of | wikipedia-en:HU_Tauri |
