|
gptkbp:instance_of
|
gptkb:star
|
|
gptkbp:age
|
approximately 1 billion years
|
|
gptkbp:apparent_magnitude
|
5.1
5.05
5.04
|
|
gptkbp:components
|
gptkb:Epsilon_Lyrae_B
gptkb:Epsilon_Lyrae_A
|
|
gptkbp:constellation
|
gptkb:Lyra
|
|
gptkbp:discovered_by
|
gptkb:William_Herschel
|
|
gptkbp:distance
|
approximately 162 light years
|
|
gptkbp:distance_from_earth
|
approximately 162 light years
approximately 160 light years
|
|
gptkbp:has_color
|
0.1
|
|
gptkbp:has_companion
|
gptkb:Epsilon_Lyrae_C
|
|
gptkbp:has_component
|
gptkb:Epsilon_Lyrae_B
gptkb:Epsilon_Lyrae_A
|
|
gptkbp:has_historical_significance
|
notable for its double star nature
|
|
gptkbp:has_luminosity
|
approximately 50 times that of the Sun
|
|
gptkbp:has_mechanic
|
0.12 arcseconds/year
-0.1, -0.2 arcseconds/year
|
|
gptkbp:has_separation
|
about 200 AU
|
|
gptkbp:has_spectral_type
|
gptkb:A
A2 V
|
|
gptkbp:has_title
|
Double Double
|
|
gptkbp:has_type
|
gptkb:star
|
|
gptkbp:has_visual_magnitude
|
6.1
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Epsilon Lyrae
|
|
gptkbp:included
|
Star Catalogs
star catalogs
|
|
gptkbp:is_associated_with
|
Lyra constellation stars
mythology of Lyra
|
|
gptkbp:is_located_at
|
Declination +39° 40′ 00″
Right Ascension 18h 44m 12s
Declination +33° 35′ 00″
|
|
gptkbp:is_located_in
|
gptkb:Northern_Hemisphere
|
|
gptkbp:is_notable_for
|
its visual double appearance
|
|
gptkbp:is_noted_for
|
its historical significance
its brightness
its brightness and visibility
its color contrast
its visual double nature
|
|
gptkbp:is_observed_in
|
telescopes
astrophysics research
amateur astronomy
|
|
gptkbp:is_part_of
|
gptkb:Lyra
gptkb:Hertzsprung–_Russell_diagram
gptkb:the_Milky_Way_galaxy
gptkb:Lyra_constellation
gptkb:Milky_Way_galaxy
multiple star system
star clusters
Herschel's catalog
Herschel 400 catalog
Messier 57 region
astronomical folklore
|
|
gptkbp:is_popular_among
|
amateur astronomers
|
|
gptkbp:is_referenced_in
|
astronomical literature
|
|
gptkbp:is_studied_for
|
stellar evolution
binary star dynamics
|
|
gptkbp:is_studied_in
|
astrophysics
|
|
gptkbp:is_used_in
|
stellar navigation
astronomical studies
educational astronomy
|
|
gptkbp:is_visible_from
|
gptkb:Northern_Hemisphere
gptkb:Earth
gptkb:true
yes
naked eye
summer months
|
|
gptkbp:known_as
|
Double Double Star
|
|
gptkbp:located_in
|
gptkb:Lyra_constellation
|
|
gptkbp:orbital_period
|
approximately 400 years
|
|
gptkbp:previous_name
|
Epsilon 1 Lyrae
Epsilon 2 Lyrae
|
|
gptkbp:scientific_classification
|
gptkb:star
multiple star system
|
|
gptkbp:speed
|
-20 km/s
|
|
gptkbp:system
|
gptkb:true
|
|
gptkbp:type
|
gptkb:star
|
|
gptkbp:type_of
|
gptkb:star
|
|
gptkbp:bfsParent
|
gptkb:Lyra
|
|
gptkbp:bfsLayer
|
5
|