|
gptkbp:instance_of
|
gptkb:open_cluster
|
|
gptkbp:age
|
approximately 3.2 million years
3 million years
|
|
gptkbp:apparent_magnitude
|
5.5
5.6
|
|
gptkbp:associated_with
|
gptkb:NGC_884
|
|
gptkbp:conducts_research_on
|
stellar dynamics
|
|
gptkbp:contains_star
|
yes
ongoing
over 100 stars
Blue supergiants
Red giants
Multiple stars
|
|
gptkbp:country
|
gptkb:unknown
|
|
gptkbp:declination
|
+35° 47′ 00″
+57° 08′ 00″
|
|
gptkbp:diameter
|
30 light years
|
|
gptkbp:discovered_by
|
gptkb:William_Herschel
|
|
gptkbp:discovery_year
|
1786
|
|
gptkbp:distance_from_earth
|
7,500 light years
|
|
gptkbp:exhibition
|
gptkb:New_General_Catalogue
gptkb:Messier_catalog
|
|
gptkbp:has_color
|
0.65
|
|
gptkbp:has_spectral_type
|
various types
|
|
gptkbp:has_supernova
|
no
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NGC 869
|
|
gptkbp:is_associated_with
|
gptkb:NGC_884
star formation regions
|
|
gptkbp:is_considered
|
a benchmark for open clusters
|
|
gptkbp:is_located_at
|
galactic coordinates (l, b) = (120°, +30°)
|
|
gptkbp:is_located_near
|
gptkb:NGC_884
|
|
gptkbp:is_noted_for
|
its rich star population
|
|
gptkbp:is_observed_in
|
gptkb:Hubble_Space_Telescope
infrared wavelengths
|
|
gptkbp:is_often_compared_to
|
gptkb:NGC_884
|
|
gptkbp:is_part_of
|
gptkb:Milky_Way_Galaxy
Perseus constellation group
Double Cluster
|
|
gptkbp:is_popular_among
|
amateur astronomers
|
|
gptkbp:is_recognized_for
|
colorful star distribution
|
|
gptkbp:is_studied_for
|
stellar populations
|
|
gptkbp:is_studied_in
|
astrophysics
|
|
gptkbp:is_used_in
|
stellar evolution studies
|
|
gptkbp:is_visible_from
|
gptkb:sunglasses
gptkb:Yes
yes
best seen in autumn
|
|
gptkbp:known_as
|
h and chi Persei
|
|
gptkbp:located_in
|
gptkb:Perseus_constellation
|
|
gptkbp:mass
|
approximately 1,000 solar masses
|
|
gptkbp:members
|
open clusters
|
|
gptkbp:metallicity
|
solar metallicity
|
|
gptkbp:orbit_type
|
no
|
|
gptkbp:part_of
|
Double Cluster (NGC 869 and NGC 884)
|
|
gptkbp:photography
|
gptkb:astronomy
|
|
gptkbp:right_ascension
|
02h 19m 00s
2h 19m 18s
02h 19m 24s
|
|
gptkbp:type
|
gptkb:star
Star Cluster
|
|
gptkbp:bfsParent
|
gptkb:Perseus
|
|
gptkbp:bfsLayer
|
5
|