| dbo:abstract |
HD 121439, also known as HR 5240, is a solitary, bluish-white hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.08, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of 774 light years based on Gaia DR3 parallax measurements but is receding with a fairly constrained radial velocity of 4 km/s. At its current distance, HD 121439's brightness is diminished by 0.57 magnitudes due to interstellar dust. This is an evolved giant star with a stellar classification of B9 III. It has 3.26 times the mass of the Sun but has expanded to 5.6 times its girth. It radiates 168 times the luminosity of the Sun from its photosphere at an effective temperature of 9,708 K. Based on extinction from the Gaia passband, HD 121439 has an iron abundance 1.65 times that of the Sun. This makes the object metal enriched. (en) HD 121439，又名CP-77 922，SAO 257107、HR 5240，是一颗恒星，视星等为6.09，位于銀經306.44，銀緯-16.19，其B1900.0坐标为赤經13h 50m 13.4s，赤緯-78° -16.19′ 7″。 (zh) |
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| dbo:wikiPageWikiLink |
dbr:Stellar_classification dbr:Gaia_DR3 dbc:B-type_giants dbc:Bright_Star_Catalogue_objects dbc:Durchmusterung_objects dbc:Gould_objects dbc:Henry_Draper_Catalogue_objects dbc:Hipparcos_objects dbr:Naked_eye dbr:Photosphere dbr:Effective_temperature dbr:Apparent_magnitude dbr:Apus dbr:Light_year dbr:Star dbr:Henry_Draper_Catalogue dbr:Parallax dbc:Apus_(constellation) dbr:International_Celestial_Reference_System dbr:Iron dbr:J2000.0 dbr:Sun dbr:Circumpolar_constellation dbr:Radial_velocity dbr:Magnitude_(astronomy) dbr:Giant_star dbr:Mass_of_the_Sun dbr:Gaia_spacecraft dbr:Sun_radius dbr:Luminosity_of_the_Sun |
| dbp:absmagV |
−0.80 (en) |
| dbp:appmagV |
6.080000 (xsd:double) |
| dbp:bV |
+0.03 (en) |
| dbp:class |
B9 III (en) |
| dbp:constell |
dbr:Apus |
| dbp:epoch |
J2000.0 (en) |
| dbp:gravity |
3.480000 (xsd:double) |
| dbp:luminosity |
168 (xsd:integer) |
| dbp:mass |
3.260000 (xsd:double) |
| dbp:metalFe |
+0.22 (en) |
| dbp:pError |
0.042500 (xsd:double) |
| dbp:parallax |
4.216600 (xsd:double) |
| dbp:propMoDec |
−9.094 (en) |
| dbp:propMoRa |
−14.337 (en) |
| dbp:radialV |
4 (xsd:integer) |
| dbp:radius |
5.550000 (xsd:double) |
| dbp:temperature |
9708 (xsd:integer) |
| dbp:uB |
−0.17 (en) |
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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:Val dbt:± dbt:DEC dbt:Odlist dbt:RA dbt:Stars_of_Apus |
| dcterms:subject |
dbc:B-type_giants dbc:Bright_Star_Catalogue_objects dbc:Durchmusterung_objects dbc:Gould_objects dbc:Henry_Draper_Catalogue_objects dbc:Hipparcos_objects dbc:Apus_(constellation) |
| rdf:type |
owl:Thing dbo:Place dbo:Location schema:Place dbo:CelestialBody dbo:Star |
| rdfs:comment |
HD 121439，又名CP-77 922，SAO 257107、HR 5240，是一颗恒星，视星等为6.09，位于銀經306.44，銀緯-16.19，其B1900.0坐标为赤經13h 50m 13.4s，赤緯-78° -16.19′ 7″。 (zh) HD 121439, also known as HR 5240, is a solitary, bluish-white hued star located in the southern circumpolar constellation Apus. It has an apparent magnitude of 6.08, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of 774 light years based on Gaia DR3 parallax measurements but is receding with a fairly constrained radial velocity of 4 km/s. At its current distance, HD 121439's brightness is diminished by 0.57 magnitudes due to interstellar dust. (en) |
| rdfs:label |
HD 121439 (en) HD 121439 (zh) |
| owl:sameAs |
wikidata:HD 121439 dbpedia-zh:HD 121439 https://global.dbpedia.org/id/AHfF |
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wikipedia-en:HD_121439?oldid=1121779062&ns=0 |
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wikipedia-en:HD_121439 |
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HD121439 (en) |
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dbr:List_of_stars_in_Apus |
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wikipedia-en:HD_121439 |