|
gptkbp:instance_of
|
gptkb:open_cluster
|
|
gptkbp:age
|
approximately 100 million years
|
|
gptkbp:apparent_magnitude
|
8.0
8.1
|
|
gptkbp:conducts_research_on
|
star cluster dynamics
|
|
gptkbp:contains_star
|
gptkb:BD+60°_2522
gptkb:HD_238125
gptkb:NGC_457
gptkb:true
yes
ongoing
approximately 40
approximately 40 stars
|
|
gptkbp:coordinates
|
l = 120.0°, b = +2.0°
|
|
gptkbp:declination
|
+60° 42′ 00″
|
|
gptkbp:diameter
|
approximately 15 light years
approximately 20 light years
|
|
gptkbp:discovered_by
|
gptkb:Pierre_Méchain
|
|
gptkbp:discovery_year
|
1781
|
|
gptkbp:distance_from_earth
|
8,100 light years
|
|
gptkbp:exhibition
|
gptkb:Messier's_list
gptkb:Messier_catalog
|
|
gptkbp:has_color
|
0.8
B-V = 0.5
|
|
gptkbp:has_distance_estimation_method
|
main-sequence fitting
|
|
gptkbp:has_spectral_type
|
various
varied
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Messier 103
|
|
gptkbp:included
|
gptkb:Messier's_original_catalog
|
|
gptkbp:is_a
|
gptkb:star
|
|
gptkbp:is_associated_with
|
open cluster studies
|
|
gptkbp:is_considered_as
|
a target for amateur astronomers
|
|
gptkbp:is_found_in
|
gptkb:the_Milky_Way
|
|
gptkbp:is_located_at
|
right ascension 1h 33m 35s, declination +60° 42′ 00″
|
|
gptkbp:is_located_near
|
gptkb:NGC_1245
|
|
gptkbp:is_notable_for
|
its star density
|
|
gptkbp:is_noted_for
|
its blue stars
its rich star field
|
|
gptkbp:is_observed_in
|
gptkb:William_Herschel
gptkb:John_Herschel
amateur astronomers
telescopes
|
|
gptkbp:is_part_of
|
Cassiopeia constellation
|
|
gptkbp:is_studied_in
|
gptkb:astronomy
|
|
gptkbp:is_used_for
|
stellar evolution studies
|
|
gptkbp:is_visible_from
|
gptkb:Northern_Hemisphere
gptkb:sunglasses
dark skies
|
|
gptkbp:known_as
|
gptkb:NGC_581
|
|
gptkbp:lighting
|
moderately bright
|
|
gptkbp:located_in
|
gptkb:Cassiopeia
constellation Cassiopeia
|
|
gptkbp:mass
|
approximately 500 solar masses
|
|
gptkbp:members
|
open clusters
|
|
gptkbp:part_of
|
gptkb:Milky_Way_galaxy
|
|
gptkbp:right_ascension
|
01h 33m 35s
|
|
gptkbp:type
|
gptkb:star
|
|
gptkbp:visible_with_binoculars
|
gptkb:true
|
|
gptkbp:bfsParent
|
gptkb:Messier_catalog
gptkb:Cassiopeia
|
|
gptkbp:bfsLayer
|
5
|