NGC 884

GPTKB entity

Statements (75)
Predicate Object
gptkbp:instance_of gptkb:star
gptkbp:age approximately 3 million years
3 million years
around 12 million years
gptkbp:apparent_magnitude 5.4
gptkbp:contains gptkb:battle
several hundred stars
ongoing star formation
Blue supergiants
Red giants
multiple bright stars
gptkbp:declination +35° 47′ 00″
+57° 07′ 00″
gptkbp:depicted_in gptkb:Northern_Hemisphere
gptkb:physicist
gptkb:sneaker
gptkb:observatory
gptkb:battle
naked eye
clear skies
autumn months
gptkbp:diameter approximately 20 light years
30 light years
gptkbp:discovered_by gptkb:William_Herschel
gptkbp:distance approximately 7,500 light years
7,500 light years
gptkbp:exhibition gptkb:New_General_Catalogue
gptkb:Messier_34
gptkbp:has_color 0.5
0.65
gptkbp:has_member hundreds of stars
gptkbp:has_spectral_type various types
O and B type stars
https://www.w3.org/2000/01/rdf-schema#label NGC 884
gptkbp:includes astronomical surveys
gptkbp:is_a gptkb:star
gptkbp:is_associated_with gptkb:NGC_869
gptkbp:is_known_for its young stars
gptkbp:is_located_near gptkb:NGC_869
gptkbp:is_noted_for gptkb:its_beauty
its historical significance
its rich star field
its stellar density
gptkbp:is_observed_in amateur astronomers
professional astronomers
optical wavelengths
gptkbp:is_often_compared_to gptkb:NGC_869
gptkbp:is_part_of gptkb:Milky_Way_Galaxy
gptkb:Milky_Way_galaxy
the Perseus O B1 association
the Double Cluster (NGC 884 and NGC 869)
Double Cluster
gptkbp:is_popular_in amateur astronomy
astrophotography
gptkbp:is_recognized_by NGC designation
gptkbp:is_similar_to gptkb:NGC_869
gptkbp:is_studied_in gptkb:observatory
stellar dynamics
stellar evolution
star formation
gptkbp:located_in gptkb:Perseus_constellation
Galactic plane
right ascension 02h 22m 38s, declination +35° 47′ 00″
gptkbp:members open clusters
open star clusters
gptkbp:part_of Double Cluster in Perseus
gptkbp:population high
gptkbp:region Perseus region
gptkbp:right_ascension 02h 22m 38s
2h 19m 30s
gptkbp:type gptkb:star
gptkbp:year_created 1786
gptkbp:bfsParent gptkb:Perseus
gptkb:Perseus_constellation
gptkbp:bfsLayer 4