|
gptkbp:instance_of
|
gptkb:open_cluster
gptkb:star
|
|
gptkbp:age
|
approximately 200 million years
approximately 1 billion years
|
|
gptkbp:apparent_magnitude
|
8.0
|
|
gptkbp:associated_with
|
the Perseus Arm of the Milky Way
|
|
gptkbp:contains
|
variable stars
|
|
gptkbp:contains_star
|
about 100
|
|
gptkbp:coordinates
|
04h 57m 00s +16° 18′ 00″
|
|
gptkbp:declination
|
+16° 18′ 00″
-02° 36' 00"
|
|
gptkbp:discovered_by
|
gptkb:William_Herschel
gptkb:John_Herschel
|
|
gptkbp:discovery_year
|
1784
1831
|
|
gptkbp:distance_from_earth
|
approximately 2,000 light years
approximately 1,500 light years
|
|
gptkbp:exhibition
|
gptkb:New_General_Catalogue
|
|
gptkbp:has_color
|
0.5
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
NGC 1817
|
|
gptkbp:is_visible_from
|
best viewed in winter months
|
|
gptkbp:lighting
|
moderately bright
|
|
gptkbp:located_in
|
constellation Taurus
constellation Orion
|
|
gptkbp:mass
|
approximately 500 solar masses
|
|
gptkbp:metallicity
|
solar metallicity
|
|
gptkbp:research
|
observed by various astronomers
|
|
gptkbp:right_ascension
|
04h 57m 00s
05h 12m 00s
|
|
gptkbp:scientific_classification
|
Galactic open cluster
|
|
gptkbp:size
|
approximately 10 arcminutes
|
|
gptkbp:type
|
gptkb:open_cluster
|
|
gptkbp:bfsParent
|
gptkb:Taurus
|
|
gptkbp:bfsLayer
|
5
|