|
gptkbp:instance_of
|
gptkb:Dwarves
gptkb:star
|
|
gptkbp:age
|
gptkb:Sirius_A
approximately 120 million years
120 million years
|
|
gptkbp:apparent_magnitude
|
8.4
8.44
+11.0
|
|
gptkbp:atmosphere
|
hydrogen and helium
|
|
gptkbp:average_temperature
|
25,000 K
25000 K
approximately 25000 K
2500 K
|
|
gptkbp:binary_separation
|
20 AU
|
|
gptkbp:components
|
gptkb:Sirius
gptkb:Sirius_star_system
|
|
gptkbp:composed_by
|
hydrogen and helium
|
|
gptkbp:composed_of
|
hydrogen, helium
|
|
gptkbp:constellation
|
gptkb:Canis_Major
|
|
gptkbp:contains_star
|
gptkb:Sirius_A
gptkb:true
|
|
gptkbp:core_composition
|
carbon-oxygen
|
|
gptkbp:country
|
false
no
|
|
gptkbp:cultural_significance
|
gptkb:various_cultures
|
|
gptkbp:current_status
|
stable white dwarf
|
|
gptkbp:discovered_by
|
gptkb:Alvan_Clark
gptkb:Alfred_Winthrop_Lawson
gptkb:Ancient_Egypt
gptkb:Alfred_Winthrop
1862
|
|
gptkbp:discovery
|
gptkb:United_States
astrometry
19th century astronomy
first white dwarf discovered
influenced stellar evolution studies
|
|
gptkbp:discovery_year
|
1862
|
|
gptkbp:distance_from_earth
|
8.6 light years
|
|
gptkbp:eccentricity
|
0.6
|
|
gptkbp:has_color
|
blue-white
|
|
gptkbp:has_companion
|
gptkb:Sirius_A
|
|
gptkbp:has_connection_to
|
gptkb:star
|
|
gptkbp:has_high_proper_motion
|
gptkb:true
|
|
gptkbp:has_luminosity
|
0.001 solar luminosities
0.001 times that of the Sun
0.0017 solar luminosities
|
|
gptkbp:has_radius
|
0.0084 solar radii
|
|
gptkbp:has_spectral_type
|
gptkb:DA2
|
|
gptkbp:has_spectroscopic_binary
|
gptkb:true
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Sirius B
|
|
gptkbp:is_a
|
gptkb:Dwarves
degenerate star
spectral type DA2
|
|
gptkbp:is_approximately
|
8.6 light years away from Earth
|
|
gptkbp:is_associated_with
|
gptkb:Greek_mythology
|
|
gptkbp:is_in_astrobiogeochemistry
|
false
|
|
gptkbp:is_in_astrobiogeology
|
false
|
|
gptkbp:is_in_astrobiogeophysics
|
false
|
|
gptkbp:is_in_astrobiology
|
false
|
|
gptkbp:is_in_astrochemistry
|
gptkb:true
|
|
gptkbp:is_in_astroecology
|
false
|
|
gptkbp:is_in_astroengineering
|
false
|
|
gptkbp:is_in_astrogeology
|
false
|
|
gptkbp:is_in_astroinformatics
|
gptkb:true
|
|
gptkbp:is_in_astrometry
|
gptkb:true
|
|
gptkbp:is_in_astrophotography
|
gptkb:true
|
|
gptkbp:is_in_astrophysics
|
gptkb:true
|
|
gptkbp:is_in_cosmology
|
gptkb:true
|
|
gptkbp:is_in_galactic_center
|
false
|
|
gptkbp:is_in_galactic_disk
|
gptkb:true
|
|
gptkbp:is_in_galactic_halo
|
false
|
|
gptkbp:is_in_globular_cluster
|
false
|
|
gptkbp:is_in_hertzsprung_russell_diagram
|
gptkb:true
|
|
gptkbp:is_in_local_group
|
gptkb:true
|
|
gptkbp:is_in_local_supercluster
|
gptkb:true
|
|
gptkbp:is_in_milky_way
|
gptkb:true
|
|
gptkbp:is_in_open_cluster
|
false
|
|
gptkbp:is_in_star_cluster
|
false
|
|
gptkbp:is_in_star_formation_region
|
false
|
|
gptkbp:is_in_stellar_classification
|
gptkb:true
|
|
gptkbp:is_in_stellar_evolution
|
gptkb:true
|
|
gptkbp:is_known_for
|
its white dwarf status
being a white dwarf
|
|
gptkbp:is_located_in
|
Canis Major constellation
|
|
gptkbp:is_often_described_as
|
the Pup
|
|
gptkbp:is_one_of
|
the closest stars to Earth
the closest white dwarfs to Earth
Sirius A and B
|
|
gptkbp:is_part_of
|
gptkb:Sirius_star_system
gptkb:the_Milky_Way_galaxy
gptkb:star
the Local Bubble
the local stellar neighborhood
the binary system Sirius
|
|
gptkbp:is_studied_in
|
gptkb:astronomy
stellar evolution
|
|
gptkbp:is_used_in
|
astrophysics
studying stellar evolution
|
|
gptkbp:is_visible_from
|
gptkb:true
false
yes
|
|
gptkbp:is_white_dwarf
|
gptkb:true
|
|
gptkbp:lighting
|
gptkb:Sirius_A
most stars
|
|
gptkbp:losses
|
10^-14 solar masses/year
|
|
gptkbp:mass
|
0.978 solar masses
0.98 solar masses
1.018 solar masses
about 0.98 solar masses
|
|
gptkbp:notable_galaxies
|
gptkb:Milky_Way
|
|
gptkbp:orbit_type
|
eccentric
|
|
gptkbp:orbital_inclination
|
63 degrees
about 63 degrees
|
|
gptkbp:orbital_period
|
50.1 years
|
|
gptkbp:originated_in
|
post-main sequence
evolved from a main sequence star
|
|
gptkbp:part_of
|
gptkb:Sirius_star_system
|
|
gptkbp:rotation_period
|
gptkb:unknown
|
|
gptkbp:size
|
gptkb:Sirius_A
|
|
gptkbp:stellar_remnant_type
|
gptkb:Dwarves
|
|
gptkbp:surface
|
100,000 m/s²
log g 8.5
|
|
gptkbp:system
|
gptkb:true
yes
|
|
gptkbp:type
|
gptkb:Dwarves
|
|
gptkbp:type_of
|
gptkb:Dwarves
|
|
gptkbp:bfsParent
|
gptkb:Sirius
|
|
gptkbp:bfsLayer
|
4
|