|
gptkbp:instance_of
|
gptkb:star
|
|
gptkbp:age
|
approximately 12 billion years
|
|
gptkbp:apparent_magnitude
|
6.2
-9.2
|
|
gptkbp:contains
|
millisecond pulsars
over 100,000 stars
|
|
gptkbp:contains_star
|
approximately 100,000
yes
|
|
gptkbp:diameter
|
175 light years
|
|
gptkbp:discovered_by
|
gptkb:Charles_Messier
|
|
gptkbp:discovery_year
|
gptkb:1764
|
|
gptkbp:distance_from_earth
|
33,600 light years
|
|
gptkbp:exhibition
|
gptkb:Messier_catalogue
gptkb:SIMBAD_database
|
|
gptkbp:first_appearance
|
gptkb:1764
gptkb:William_Herschel
|
|
gptkbp:has_color
|
B-V = 0.95
|
|
gptkbp:has_concentration
|
c = 1.5
|
|
gptkbp:has_high_density
|
yes
|
|
gptkbp:has_radius
|
about 4.5 arcminutes
about 2.5 arcminutes
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Messier 15
|
|
gptkbp:included
|
astronomical catalogs
|
|
gptkbp:ingredients
|
multiple stellar generations
|
|
gptkbp:is_analyzed_in
|
stellar populations
|
|
gptkbp:is_associated_with
|
gptkb:dark_matter
|
|
gptkbp:is_considered
|
a benchmark for globular clusters
|
|
gptkbp:is_examined_in
|
dynamics of globular clusters
|
|
gptkbp:is_explored_in
|
space telescopes
|
|
gptkbp:is_famous_for
|
its ancient stars
|
|
gptkbp:is_home_to
|
blue straggler stars
|
|
gptkbp:is_known_for
|
high density of stars
|
|
gptkbp:is_located_at
|
Declination +12° 10′ 01″
Right Ascension 21h 29m 58.6s
|
|
gptkbp:is_located_near
|
gptkb:the_Great_Square_of_Pegasus
|
|
gptkbp:is_notable_for
|
its compactness
its high stellar density in the core
|
|
gptkbp:is_noted_for
|
its rich stellar population
|
|
gptkbp:is_observed_in
|
gptkb:Hubble_Space_Telescope
star parties
large telescopes
|
|
gptkbp:is_part_of
|
gptkb:Messier_catalog
gptkb:Milky_Way_Galaxy
gptkb:Milky_Way_galaxy
gptkb:the_Local_Group
Galactic halo
the Milky Way's globular cluster system
|
|
gptkbp:is_studied_for
|
stellar dynamics
its core collapse dynamics
|
|
gptkbp:is_studied_in
|
gptkb:astronomy
|
|
gptkbp:is_used_in
|
stellar evolution studies
|
|
gptkbp:is_visible_from
|
gptkb:Northern_Hemisphere
gptkb:sunglasses
yes
|
|
gptkbp:known_as
|
gptkb:NGC_7078
|
|
gptkbp:lighting
|
about 13.5 mag/arcmin²
|
|
gptkbp:located_in
|
gptkb:Pegasus_constellation
constellation Pegasus
|
|
gptkbp:mass
|
approximately 1.5 million solar masses
|
|
gptkbp:metallicity
|
[ Fe/ H] = -2.17
|
|
gptkbp:notable_feature
|
contains a planetary nebula
|
|
gptkbp:photography
|
amateur astronomers
|
|
gptkbp:scope
|
gptkb:NGC_7078
|
|
gptkbp:type
|
gptkb:Population_II_cluster
Type II globular cluster
|
|
gptkbp:bfsParent
|
gptkb:Pegasus
|
|
gptkbp:bfsLayer
|
4
|