|
gptkbp:instance_of
|
gptkb:star
gptkb:nebula
|
|
gptkbp:bfsLayer
|
4
|
|
gptkbp:bfsParent
|
gptkb:Cepheus_constellation
gptkb:Perseus
gptkb:Cassiopeia
|
|
gptkbp:age
|
approximately 21 million years
|
|
gptkbp:apparent_magnitude
|
6.4
7.4
8.4
|
|
gptkbp:associated_with
|
gptkb:Milky_Way_Galaxy
star formation
|
|
gptkbp:best_time_to_visit
|
autumn months
|
|
gptkbp:contains
|
gptkb:Kappa_Cassiopeiae
gptkb:battle
over 150
ongoing
approximately 150
stars
about 150 stars
|
|
gptkbp:coordinates
|
RA 01h 19m 25s, Dec +58° 16′ 00″
|
|
gptkbp:declination
|
+58° 19′ 00″
+58° 16′ 00″
|
|
gptkbp:depicted_in
|
gptkb:Northern_Hemisphere
gptkb:Messier's_catalog
gptkb:sneaker
clear nights
autumn nights
naked eye under dark skies
|
|
gptkbp:diameter
|
approximately 10 light years
approximately 20 light years
|
|
gptkbp:discovered_by
|
gptkb:William_Herschel
|
|
gptkbp:distance
|
approximately 2,000 light years
approximately 2,500 light years
approximately 7,500 light years
approximately 9,200 light years
|
|
gptkbp:exhibition
|
gptkb:New_General_Catalogue
Herschel 400 catalog
|
|
gptkbp:first_appearance
|
1787
|
|
gptkbp:has_color
|
0.5
0.8
blue and white stars
B-V = 0.65
|
|
gptkbp:has_luminosity
|
two prominent stars
|
|
gptkbp:has_spectral_type
|
various
varied
various types
O and B type stars
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NGC 457
|
|
gptkbp:in-game_items
|
gptkb:NGC_2244
|
|
gptkbp:includes
|
gptkb:Messier_52
gptkb:Messier_50
|
|
gptkbp:ingredients
|
multiple star types
|
|
gptkbp:is_analyzed_in
|
astrophysicists
|
|
gptkbp:is_associated_with
|
open clusters
the Milky Way's spiral arms
|
|
gptkbp:is_considered
|
a good target for beginners
|
|
gptkbp:is_considered_as
|
a target for observation
|
|
gptkbp:is_described_as
|
astronomical databases
a star cluster
|
|
gptkbp:is_discussed_in
|
astronomy literature
|
|
gptkbp:is_explored_in
|
space telescopes
|
|
gptkbp:is_found_in
|
the northern sky
|
|
gptkbp:is_known_for
|
gptkb:The_Owl_Cluster
gptkb:Owl_Cluster
its rich star field
its resemblance to an owl
|
|
gptkbp:is_located_near
|
gptkb:NGC_456
|
|
gptkbp:is_noted_for
|
its bright stars
|
|
gptkbp:is_observed_in
|
gptkb:Photographer
amateur astronomers
telescopes
amateur astronomy
observed since the 18th century
|
|
gptkbp:is_often_compared_to
|
gptkb:NGC_869
|
|
gptkbp:is_part_of
|
gptkb:Galactic_Halo
gptkb:Milky_Way_Galaxy
gptkb:Milky_Way_galaxy
Cassiopeia constellation
open cluster category
star cluster research
open cluster family
open cluster catalogues
the Milky Way's open clusters.
the Herschel 400 list
|
|
gptkbp:is_popular_in
|
astrophotographers
stargazers
|
|
gptkbp:is_referenced_in
|
astronomical surveys
|
|
gptkbp:is_studied_in
|
gptkb:observatory
astrophysics
stellar evolution
|
|
gptkbp:is_used_in
|
star formation studies
|
|
gptkbp:lighting
|
moderate brightness
|
|
gptkbp:located_in
|
gptkb:Milky_Way
Cassiopeia constellation
constellation Cassiopeia
right ascension 1h 19m 24s, declination +58° 19′ 00″
coordinates 01h 20m 30s +58° 19′ 00″
galactic coordinates (120°, 0°)
right ascension 01h 19m 24s, declination +58° 16′ 00″
|
|
gptkbp:map
|
star charts
|
|
gptkbp:mass
|
approximately 1,000 solar masses
|
|
gptkbp:notable_feature
|
resembling an owl
|
|
gptkbp:notable_for
|
its distinctive shape
its star density
its resemblance to an owl
|
|
gptkbp:notable_guest_stars
|
gptkb:HD_238024
gptkb:HD_238025
gptkb:HD_238026
gptkb:HD_238027
gptkb:HD_238028
gptkb:HD_238029
gptkb:HD_238030
gptkb:HD_238031
gptkb:HD_238032
gptkb:HD_238033
gptkb:HD_238034
gptkb:HD_238035
gptkb:HD_238036
gptkb:HD_238037
gptkb:HD_238038
gptkb:HD_238039
gptkb:HD_238040
gptkb:HD_238041
gptkb:HD_238042
gptkb:HD_238043
gptkb:HD_238044
gptkb:HD_238045
gptkb:HD_238046
gptkb:HD_238047
gptkb:HD_238048
gptkb:HD_238049
gptkb:HD_238050
gptkb:HD_238051
gptkb:HD_238052
gptkb:HD_238072
gptkb:HD_238073
gptkb:HD_238074
gptkb:HD_238075
gptkb:HD_238076
gptkb:HD_238077
gptkb:HD_238078
gptkb:HD_238079
gptkb:HD_238080
gptkb:HD_238081
gptkb:HD_238082
gptkb:HD_238083
gptkb:HD_238084
gptkb:HD_238085
gptkb:HD_238086
gptkb:HD_238087
gptkb:HD_238088
gptkb:HD_238089
gptkb:HD_238090
gptkb:HD_238091
gptkb:HD_238092
gptkb:HD_238093
gptkb:HD_238094
gptkb:HD_238095
gptkb:HD_238096
gptkb:HD_238097
gptkb:HD_238098
gptkb:HD_238099
gptkb:HD_238100
HD 238053
HD 238054
HD 238055
HD 238056
HD 238057
HD 238058
HD 238059
HD 238060
HD 238061
HD 238062
HD 238063
HD 238064
HD 238065
HD 238066
HD 238067
HD 238068
HD 238069
HD 238070
HD 238071
|
|
gptkbp:notable_person
|
gptkb:Epsilon_Cassiopeiae
|
|
gptkbp:part_of
|
Cassiopeia constellation
|
|
gptkbp:photography
|
gptkb:Hubble_Space_Telescope
amateur astronomers
amateur astrophotographers
|
|
gptkbp:population
|
high
|
|
gptkbp:right_ascension
|
01h 19m 25s
01h 19m 24s
01h 20m 30s
|
|
gptkbp:scientific_classification
|
an open star cluster
a deep-sky object
|
|
gptkbp:size
|
approximately 20 light years across
approximately 15 arcminutes
|
|
gptkbp:type
|
gptkb:star
|
|
gptkbp:year_created
|
1787
|