About: HD 44120

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HD 44120 is a wide binary star system in the southern constellation of Pictor. Although visible to the naked eye, it is a challenge to view having an apparent visual magnitude of 6.44. The system is located at a distance of 118 light years from the Sun based on parallax, but it is drifting closer with a radial velocity of −2 km/s. It has an absolute magnitude of 3.57.

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body star
rdfs:label	HD 44120 (en) HD 44120 (sv) HD 44120 (zh)
rdfs:comment	HD 44120 är en dubbelstjärna med stort vinkelavstånd i den södra delen av stjärnbilden Målaren. Den har en skenbar magnitud av ca 6,44 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ungefär 27,7 mas, beräknas den befinna sig på ett avstånd på cirka 118 ljusår (ca 36 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på cirka -2 km/s. (sv) HD 44120，又名CP-59 619，SAO 234418、HR 2274，是一颗恒星，视星等为6.43，位于銀經268.17，銀緯-27.47，其B1900.0坐标为赤經6h 14m 55.5s，赤緯-59° -27.47′ 0″。 (zh) HD 44120 is a wide binary star system in the southern constellation of Pictor. Although visible to the naked eye, it is a challenge to view having an apparent visual magnitude of 6.44. The system is located at a distance of 118 light years from the Sun based on parallax, but it is drifting closer with a radial velocity of −2 km/s. It has an absolute magnitude of 3.57. (en)
dcterms:subject	Binary stars Bright Star Catalogue objects Durchmusterung objects F-type main-sequence stars Gliese and GJ objects Henry Draper Catalogue objects Hipparcos objects White dwarfs Pictor (constellation)
Wikipage page ID	65947489 (xsd:integer)
Wikipage revision ID	1122855497 (xsd:integer)
Link from a Wikipage to another Wikipage	Binary star Double star Stellar classification Binary stars Bright Star Catalogue objects Durchmusterung objects F-type main-sequence stars Gliese and GJ objects Henry Draper Catalogue objects Hipparcos objects White dwarfs Constellation Photosphere Effective temperature Convection zone Light year Orbital period Stellar parallax White dwarf Absolute magnitude James Dunlop Angular separation Pictor (constellation) Sun Pictor Position angle Solar analog Apparent visual magnitude Radial velocity F-type main-sequence star Chromospheric activity Mass of the Sun Semimajor axis Sun's radius Projected rotational velocity Projected separation Visual companion Luminosity of the Sun
sameAs	HD 44120 HD 44120 HD 44120 HD 44120
dbp:wikiPageUsesTemplate	dbt:Convert dbt:Reflist dbt:Short_description dbt:Sky 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:DEC dbt:Odlist dbt:RA dbt:Stars_of_Pictor
absmag v	3.570000 (xsd:double)
appmag v	6.440000 (xsd:double)
class	F9.5V + DB3.2 (en)
component	A (en) C (en)
constell	Pictor
epoch	J2000.0 (en)
p error	0.017200 (xsd:double)
parallax	27.756300 (xsd:double)
prop mo dec	−316.389 (en)
prop mo ra	−45.187 (en)
rotational velocity	3.390000 (xsd:double)
Simbad	HD+44120 (en) WG+8 (en)
sn	A (en) C (en)
has abstract	HD 44120 is a wide binary star system in the southern constellation of Pictor. Although visible to the naked eye, it is a challenge to view having an apparent visual magnitude of 6.44. The system is located at a distance of 118 light years from the Sun based on parallax, but it is drifting closer with a radial velocity of −2 km/s. It has an absolute magnitude of 3.57. The primary member, designated component A of this system, is an F-type main-sequence star with a stellar classification of F9.5V. It is a Sun-like star and has been considered a "hot" solar analog with a shallower convection zone than the Sun. The estimated age of this star is about four billion years, and it is spinning with a projected rotational velocity of 3.4 km/s. It is chromospherically inactive. The star has 1.2 times the mass of the Sun and 1.6 times the Sun's radius. It is radiating nearly three times the luminosity of the Sun from its photosphere at an effective temperature of 6,005 K. The faint secondary companion, component C, is a magnitude 14.03 white dwarf star with a class of DB3.2, indicating a helium-rich atmosphere. The object has an effective temperature of ~15,700 K with 67% of the Sun's mass but only 1.3% of the Sun's radius. It has taken 155±16 Myr for the white dwarf to have cooled to the current temperature. Prior to leaving the main sequence, this star is estimated to have had 1.45+0.20−0.16 M☉ and thus was the system primary. It has an angular separation of 40.98″ along a position angle of 301.6° from the current primary. The projected separation of this co-moving pair is 1,533.9 AU. Their estimated orbit has a semimajor axis of 1,702.6 AU and an orbital period of 51,100 years. A magnitude 7.61 visual companion, HD 44105, or component B, lies at an angular separation of 32.50″ along a position angle of 234° from component A, as of 2015. It was discovered as a double star by the Scottish astronomer James Dunlop and announced in 1829. The parallax for this star indicates a distance of approximately 215 ly (66 pc) from the Sun. (en) HD 44120 är en dubbelstjärna med stort vinkelavstånd i den södra delen av stjärnbilden Målaren. Den har en skenbar magnitud av ca 6,44 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ungefär 27,7 mas, beräknas den befinna sig på ett avstånd på cirka 118 ljusår (ca 36 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet på cirka -2 km/s. (sv)

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