|
gptkbp:instance_of
|
gptkb:open_cluster
|
|
gptkbp:age
|
approximately 300 million years
|
|
gptkbp:apparent_magnitude
|
4.6
|
|
gptkbp:contains
|
red giants
multiple blue stars
|
|
gptkbp:contains_star
|
ongoing
approximately 30
|
|
gptkbp:declination
|
+48° 26′ 00″
|
|
gptkbp:discovered_by
|
gptkb:Charles_Messier
|
|
gptkbp:discovery_year
|
gptkb:1764
|
|
gptkbp:distance_from_earth
|
approximately 1,000 light years
|
|
gptkbp:exhibition
|
gptkb:Messier_catalog
|
|
gptkbp:first_appearance
|
gptkb:Jean-Dominique_Maraldi
|
|
gptkbp:has_color
|
0.5
|
|
gptkbp:has_mechanic
|
not significant
|
|
gptkbp:has_spectral_type
|
various
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Messier 39
|
|
gptkbp:included
|
astronomical surveys
|
|
gptkbp:is_a
|
gptkb:star
|
|
gptkbp:is_associated_with
|
other nearby clusters
|
|
gptkbp:is_considered
|
a good target for binoculars
|
|
gptkbp:is_located_at
|
Galactic coordinates (90°, 0°)
|
|
gptkbp:is_located_near
|
gptkb:North_America_Nebula
the Cygnus X-1 region
|
|
gptkbp:is_noted_for
|
its historical significance
its brightness
its star density
its potential for exoplanet studies
its color diversity
|
|
gptkbp:is_observed_in
|
amateur astronomers
professional astronomers
various wavelengths
|
|
gptkbp:is_part_of
|
gptkb:Galactic_Halo
gptkb:Cygnus_constellation
gptkb:the_Local_Group
Milky Way structure
|
|
gptkbp:is_referenced_in
|
astronomical literature
|
|
gptkbp:is_studied_for
|
stellar dynamics
|
|
gptkbp:is_studied_in
|
astrophysics
|
|
gptkbp:is_used_in
|
stellar evolution studies
|
|
gptkbp:is_visible_from
|
gptkb:Northern_Hemisphere
dark skies
urban areas with light pollution
best viewed in late summer
|
|
gptkbp:located_in
|
constellation Cygnus
|
|
gptkbp:map
|
star charts
|
|
gptkbp:part_of
|
gptkb:Milky_Way_galaxy
|
|
gptkbp:photography
|
gptkb:Hubble_Space_Telescope
|
|
gptkbp:previous_name
|
NGC 7092
|
|
gptkbp:right_ascension
|
20h 54m 30s
|
|
gptkbp:size
|
approximately 20 arcminutes
|
|
gptkbp:type
|
gptkb:star
|
|
gptkbp:bfsParent
|
gptkb:Cygnus
|
|
gptkbp:bfsLayer
|
5
|