|
gptkbp:instanceOf
|
gptkb:star
astronomer
|
|
gptkbp:age
|
500 million years
|
|
gptkbp:apparentMagnitude
|
2.37
|
|
gptkbp:BayerDesignation
|
gptkb:β_Ursae_Majoris
|
|
gptkbp:catalogueNumber
|
gptkb:ADS_8035
gptkb:BD+56_1605
gptkb:GC_15117
gptkb:HD_95418
gptkb:HIP_53910
gptkb:HR_4295
gptkb:FK5_399
gptkb:SAO_28199
gptkb:WDS_J11018+5623
|
|
gptkbp:constellation
|
gptkb:Ursa_Major
|
|
gptkbp:declination
|
+56° 22′ 57″
|
|
gptkbp:diameter
|
2.84 solar radii
|
|
gptkbp:discoveredBy
|
ancient astronomers
|
|
gptkbp:distanceFromEarth
|
79.7 light years
|
|
gptkbp:FlamsteedDesignation
|
gptkb:48_Ursae_Majoris
|
|
gptkbp:hasCompanion
|
no known stellar companion
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Beta Ursae Majoris
|
|
gptkbp:IAUApprovedName
|
gptkb:Merak
|
|
gptkbp:isNavigationStar
|
true
|
|
gptkbp:isPointerStar
|
true
|
|
gptkbp:luminosity
|
68 times solar luminosity
|
|
gptkbp:mass
|
2.7 solar masses
|
|
gptkbp:metallicity
|
−0.04 [Fe/H]
|
|
gptkbp:otherName
|
gptkb:Merak
|
|
gptkbp:parallax
|
40.90 mas
|
|
gptkbp:partOf
|
gptkb:Big_Dipper_asterism
|
|
gptkbp:properMotionRA
|
+55.61 mas/yr (Dec)
−121.17 mas/yr (RA)
|
|
gptkbp:rightAscension
|
11h 01m 50.5s
|
|
gptkbp:rotationPeriod
|
46 km/s
|
|
gptkbp:spectralType
|
A1IVps
|
|
gptkbp:temperature
|
9,375 K
|
|
gptkbp:usedToFind
|
gptkb:Polaris
|
|
gptkbp:visibleToNakedEye
|
true
|
|
gptkbp:bfsParent
|
gptkb:Ursae_Majoris
gptkb:Merak
gptkb:北河
|
|
gptkbp:bfsLayer
|
7
|