About: 31 Persei

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31 Persei is a single star in the northern constellation of Perseus. It is visible to the naked eye as a dim, blue-white hued point of light with an apparent visual magnitude of 5.05. This star is located around 172 parsecs (560 ly) away from the Sun, and it is drifting closer with a radial velocity of −1.6 km/s. It is a likely member of the Alpha Persei Cluster.

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place celestial body yago:WikicatB-typeMain-sequenceStars yago:CelestialBody109239740 yago:NaturalObject100019128 yago:Object100002684 yago:PhysicalEntity100001930 star yago:Star109444100 yago:Whole100003553 yago:WikicatFlamsteedObjects
rdfs:label	31 Persei (en) 31 Persei (sv) 天船增二 (zh)
rdfs:comment	31 Persei, som är stjärnans Flamsteed-beteckning, är en ensam stjärna belägen i den norra delen av stjärnbilden, Perseus. Den har en skenbar magnitud på ca 5,05 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallax enligt Gaia Data Release 2 på ca 5,8 mas, beräknas den befinna sig på ett avstånd på ca 560 ljusår (ca 172 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca -1,6 km/s. Stjärnan ingår troligen i Alfa Persei-hopen. (sv) 英仙座31，又名BD+49 902，HD 20418、SAO 38714、HR 989，是英仙座的一颗恒星，视星等为5.03，位于銀經145.74，銀緯-6.12，其B1900.0坐标为赤經3h 12m 0.4s，赤緯+49° -6.12′ 47″。 (zh) 31 Persei is a single star in the northern constellation of Perseus. It is visible to the naked eye as a dim, blue-white hued point of light with an apparent visual magnitude of 5.05. This star is located around 172 parsecs (560 ly) away from the Sun, and it is drifting closer with a radial velocity of −1.6 km/s. It is a likely member of the Alpha Persei Cluster. (en)
foaf:depiction
dcterms:subject	B-type main-sequence stars Bright Star Catalogue objects Durchmusterung objects Flamsteed objects Henry Draper Catalogue objects Hipparcos objects Perseus (constellation) Alpha Persei Cluster
Wikipage page ID	41484652 (xsd:integer)
Wikipage revision ID	1079512236 (xsd:integer)
Link from a Wikipage to another Wikipage	Perseus (constellation) Stellar classification B-type main-sequence stars Bright Star Catalogue objects Durchmusterung objects Flamsteed objects Henry Draper Catalogue objects Hipparcos objects Perseus (constellation) Constellation Photosphere Effective temperature Star Alpha Persei Cluster Alpha Persei Cluster Stellar core B-type main-sequence star Apparent visual magnitude Radial velocity Mass of the Sun Hydrogen fusion Sun's radius Projected rotational velocity Luminosity of the Sun
sameAs	31 Persei 31 Persei 31 Persei 31 Persei 31 Persei 31 Persei
dbp:wikiPageUsesTemplate	dbt:Convert 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_image dbt:Starbox_observe dbt:Starbox_reference dbt:Stars_of_Perseus dbt:DEC dbt:Location_mark dbt:Odlist dbt:RA
thumbnail	wiki-commons:Special:FilePath/Perseus_constellation_map.svg?width=300
absmag v	−1.44 (en)
age myr	234 (xsd:integer)
appmag v	5.050000 (xsd:double)
b-v	−0.06 (en)
class	B5V (en)
constell	Perseus (constellation)
epoch	J2000 (en)
luminosity	950 (xsd:integer)
mass	4.647000 (xsd:double)
metal fe	0 (xsd:integer)
p error	0.179200 (xsd:double)
parallax	5.839900 (xsd:double)
prop mo dec	−23.322 (en)
prop mo ra	+23.580 (en)
radial v	−1.60 (en)
radius	3.400000 (xsd:double)
rotational velocity	260 (xsd:integer)
temperature	15301 (xsd:integer)
u-b	−0.53 (en)
has abstract	31 Persei is a single star in the northern constellation of Perseus. It is visible to the naked eye as a dim, blue-white hued point of light with an apparent visual magnitude of 5.05. This star is located around 172 parsecs (560 ly) away from the Sun, and it is drifting closer with a radial velocity of −1.6 km/s. It is a likely member of the Alpha Persei Cluster. This object is a B-type main-sequence star with a stellar classification of B5V, a massive star that is currently generating energy through hydrogen fusion at its core. It is around 234 million years old and spinning rapidly with a projected rotational velocity of 260 km/s. The star has 4.6 times the mass of the Sun and about 3.4 times the Sun's radius. It is radiating 950 times the luminosity of the Sun from its photosphere at an effective temperature of 15,301 K. (en)

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