Mu1 Cancri (original) (raw)
9 Cancri è una stella gigante rossa di magnitudine 5,99 situata nella costellazione del Cancro. Dista 626 anni luce dal sistema solare.
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| dbo:abstract | Mu1 Cancri, Latinised from μ1 Cancri, is a variable star in the zodiac constellation of Cancer. The name Mu1 comes from the Bayer naming system: the "1" in the name is because (from Earth) it appears to be close to 10 Cancri, or Mu2 Cancri. It is also known by the variable star designation BL Cancri. The star is dimly visible to the naked eye with an apparent visual magnitude that ranges from 5.87 down to 6.07. Parallax measurements put it about 630 light-years (192 parsecs) from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.28. The position of the star near the ecliptic means it is subject to lunar occultations. The star Mu1 Cancri is an evolved red giant currently on the asymptotic giant branch with a stellar classification of M3 III. The lack of technetium-99 in the spectrum indicates it has not yet gone through third dredge-up. It is a slow irregular variable with thermal pulsation periods of 22.6, 37.8 and 203.7 days. The star has expanded to 57 times the radius of the Sun and it is radiating 565 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,774 K. (en) 9 Cancri è una stella gigante rossa di magnitudine 5,99 situata nella costellazione del Cancro. Dista 626 anni luce dal sistema solare. (it) My1 Cancri (μ1 Cancri, förkortad My1 Cnc, μ1 Cnc), som är stjärnans Bayer-beteckning, är en ensam stjärna i västra delen av stjärnbilden Kräftan. Den har en skenbar magnitud av 5,99 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 4,4 mas, beräknas den befinna sig på ett avstånd av ca 740 ljusår (230 parsek) från solen. På det beräknade avståndet minskar dess skenbara magnitud med 0,28 enheter på grund av interstellärt stoft. (sv) |
| dbo:thumbnail | wiki-commons:Special:FilePath/BLCncLightCurve.png?width=300 |
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| dbo:wikiPageRevisionID | 1121452453 (xsd:integer) |
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| dbp:absmagV | −0.79 (en) |
| dbp:appmagV | (en) +5.99 (en) |
| dbp:bV | +1.66 (en) |
| dbp:class | M3 III (en) |
| dbp:constell | dbr:Cancer_(constellation) |
| dbp:epoch | dbr:J2000.0 |
| dbp:equinox | J2000.0 (en) |
| dbp:pError | 0.170200 (xsd:double) |
| dbp:parallax | 5.202900 (xsd:double) |
| dbp:propMoDec | −9.696 (en) |
| dbp:propMoRa | −5.716 (en) |
| dbp:type | Asymptotic giant branch (en) |
| dbp:variable | dbr:Slow_irregular_variable |
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| dct:subject | dbc:Asymptotic-giant-branch_stars dbc:Bayer_objects dbc:Bright_Star_Catalogue_objects dbc:Cancer_(constellation) dbc:Durchmusterung_objects dbc:Flamsteed_objects dbc:Henry_Draper_Catalogue_objects dbc:Hipparcos_objects dbc:M-type_giants dbc:Objects_with_variable_star_designations dbc:Slow_irregular_variables |
| gold:hypernym | dbr:Star |
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| rdfs:comment | 9 Cancri è una stella gigante rossa di magnitudine 5,99 situata nella costellazione del Cancro. Dista 626 anni luce dal sistema solare. (it) My1 Cancri (μ1 Cancri, förkortad My1 Cnc, μ1 Cnc), som är stjärnans Bayer-beteckning, är en ensam stjärna i västra delen av stjärnbilden Kräftan. Den har en skenbar magnitud av 5,99 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 4,4 mas, beräknas den befinna sig på ett avstånd av ca 740 ljusår (230 parsek) från solen. På det beräknade avståndet minskar dess skenbara magnitud med 0,28 enheter på grund av interstellärt stoft. (sv) Mu1 Cancri, Latinised from μ1 Cancri, is a variable star in the zodiac constellation of Cancer. The name Mu1 comes from the Bayer naming system: the "1" in the name is because (from Earth) it appears to be close to 10 Cancri, or Mu2 Cancri. It is also known by the variable star designation BL Cancri. The star is dimly visible to the naked eye with an apparent visual magnitude that ranges from 5.87 down to 6.07. Parallax measurements put it about 630 light-years (192 parsecs) from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.28. The position of the star near the ecliptic means it is subject to lunar occultations. (en) |
| rdfs:label | 9 Cancri (it) Mu1 Cancri (en) My1 Cancri (sv) |
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| foaf:depiction | wiki-commons:Special:FilePath/BLCncLightCurve.png |
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| foaf:name | Mu1 Cancri (en) |
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