|
gptkbp:instance_of
|
gptkb:star
|
|
gptkbp:bfsLayer
|
4
|
|
gptkbp:bfsParent
|
gptkb:Orion_constellation
gptkb:Orion_Molecular_Cloud_Complex
gptkb:Perseus_constellation
|
|
gptkbp:age
|
approximately 20 million years
|
|
gptkbp:apparent_magnitude
|
6.8
|
|
gptkbp:average_temperature
|
around 10,000 K
|
|
gptkbp:body_style
|
irregular
|
|
gptkbp:contains
|
gptkb:HD_37061
gptkb:HD_37062
HD 37063
HD 37064
HD 37065
HD 37066
HD 37067
HD 37068
HD 37069
HD 37070
|
|
gptkbp:declination
|
-04° 55′ 00″
|
|
gptkbp:depicted_in
|
gptkb:physicist
best viewed in winter months
|
|
gptkbp:discovered_by
|
gptkb:John_Herschel
|
|
gptkbp:distance
|
1,500 light years
|
|
gptkbp:exhibition
|
gptkb:New_General_Catalogue
gptkb:Messier_catalog
|
|
gptkbp:has_color
|
0.0
blue-white
|
|
gptkbp:has_luminosity
|
high luminosity
|
|
gptkbp:has_spectral_type
|
B-type stars
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NGC 1981
|
|
gptkbp:is_associated_with
|
gptkb:Betelgeuse
gptkb:Orion's_Belt
gptkb:Rigel
gptkb:Orion's_Sword
Orion constellation stars
|
|
gptkbp:is_located_near
|
gptkb:Orion_Nebula
|
|
gptkbp:is_observed_in
|
gptkb:Spitzer_Space_Telescope
gptkb:Chandra_X-ray_Observatory
gptkb:Hubble_Space_Telescope
|
|
gptkbp:is_part_of
|
gptkb:Milky_Way_Galaxy
|
|
gptkbp:is_similar_to
|
gptkb:NGC_1980
gptkb:NGC_1982
|
|
gptkbp:is_studied_in
|
astrophysics
stellar evolution
galactic astronomy
star cluster dynamics
|
|
gptkbp:lighting
|
moderately bright
|
|
gptkbp:located_in
|
gptkb:Orion_constellation
|
|
gptkbp:mass
|
approximately 1,000 solar masses
|
|
gptkbp:notable_feature
|
gptkb:star
bright stars
|
|
gptkbp:part_of
|
gptkb:Orion_Molecular_Cloud_Complex
|
|
gptkbp:population
|
low density
|
|
gptkbp:right_ascension
|
05h 35m 24s
|
|
gptkbp:size
|
approximately 10 arcminutes
|
|
gptkbp:year_created
|
1831
|