|
gptkbp:instance_of
|
gptkb:star
|
|
gptkbp:age
|
approximately 13 billion years
|
|
gptkbp:apparent_magnitude
|
yes
6.0
|
|
gptkbp:contains_star
|
yes
approximately 100,000 stars
|
|
gptkbp:coordinates
|
l = 335.5°, b = -6.5°
|
|
gptkbp:declination
|
-53° 40′ 00″
|
|
gptkbp:discovered_by
|
gptkb:James_Dunlop
|
|
gptkbp:discovery_year
|
1826
|
|
gptkbp:distance_from_earth
|
7,800 light years
|
|
gptkbp:exhibition
|
gptkb:New_General_Catalogue
|
|
gptkbp:has_black_holes
|
possible presence
|
|
gptkbp:has_blue_stragglers
|
yes
|
|
gptkbp:has_main_sequence_stars
|
yes
|
|
gptkbp:has_neutron_stars
|
yes
|
|
gptkbp:has_radius
|
about 1.5 arcminutes
about 3.5 arcminutes
|
|
gptkbp:has_red_giant_stars
|
yes
|
|
gptkbp:has_tidal_radius
|
about 20 arcminutes
|
|
gptkbp:has_white_dwarfs
|
yes
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NGC 6397
|
|
gptkbp:is_associated_with
|
other globular clusters
|
|
gptkbp:is_located_in
|
constellation Ara
|
|
gptkbp:is_observed_in
|
gptkb:Hubble_Space_Telescope
optical wavelengths
X-ray wavelengths
infrared wavelengths
|
|
gptkbp:is_part_of
|
gptkb:Galactic_Halo
gptkb:Milky_Way_globular_cluster_system
gptkb:Galactic_bulge
|
|
gptkbp:is_studied_for
|
chemical composition
binary star systems
stellar dynamics
stellar evolution
stellar populations
stellar evolution models
stellar interactions
stellar population synthesis
stellar kinematics
stellar mass function
dark matter presence
stellar age determination
mass segregation
stellar populations analysis
dynamics of star clusters
stellar luminosity function
stellar metallicity determination
|
|
gptkbp:is_used_in
|
stellar astrophysics research
|
|
gptkbp:is_visible_from
|
gptkb:sunglasses
|
|
gptkbp:located_in
|
gptkb:Milky_Way
|
|
gptkbp:metallicity
|
[ Fe/ H] = -0.5
|
|
gptkbp:notable_for
|
being one of the closest globular clusters to Earth
|
|
gptkbp:population_density
|
high
|
|
gptkbp:right_ascension
|
17h 40m 42.0s
|
|
gptkbp:type
|
gptkb:Population_II_star_cluster
spherical cluster
|
|
gptkbp:bfsParent
|
gptkb:Globular_Clusters
|
|
gptkbp:bfsLayer
|
5
|