gptkbp:instance_of
|
gptkb:Nebula_Award
|
gptkbp:age
|
around 8,000 years
about 8,000 years
|
gptkbp:apparent_magnitude
|
7.5
7.4
7.4 in visual band
|
gptkbp:associated_stars
|
multiple stars in vicinity
|
gptkbp:associated_with
|
star formation
|
gptkbp:body_shape
|
dumbbell-shaped
|
gptkbp:color
|
blue-green
|
gptkbp:common_name
|
gptkb:Apple_Core_Nebula
|
gptkbp:composed_by
|
hydrogen and helium
|
gptkbp:contains_star
|
gptkb:Dwarves
|
gptkbp:coordinates
|
RA 19h 59m 36s, Dec +22° 43′ 16″
|
gptkbp:discovered_by
|
gptkb:Charles_Messier
|
gptkbp:discovery_year
|
gptkb:1764
|
gptkbp:distance_from_earth
|
1,360 light years
|
gptkbp:distance_in_parsecs
|
417 parsecs
|
gptkbp:emissions_standard
|
H-alpha
ionized gas
H-alpha and [ O III]
|
gptkbp:exhibition
|
gptkb:Messier_Catalog
gptkb:Messier_27
New General Catalogue as NGC 6853
|
gptkbp:expansion_plans
|
20 km/s
|
gptkbp:expansion_rate
|
0.5 arcseconds per year
|
gptkbp:has_radius
|
about 1.5 light years
|
gptkbp:has_spectral_type
|
O-type star
|
gptkbp:historical_significance
|
first planetary nebula discovered
|
https://www.w3.org/2000/01/rdf-schema#label
|
Dumbbell Nebula
|
gptkbp:image
|
Hubble Space Telescope image
|
gptkbp:is_observed_in
|
gptkb:William_Herschel
|
gptkbp:is_popular_in
|
amateur astronomy
|
gptkbp:is_visible_from
|
best viewed in summer months
|
gptkbp:light_spectrum
|
broad emission spectrum
|
gptkbp:lighting
|
visible from urban areas
|
gptkbp:location
|
constellation Vulpecula
|
gptkbp:notable_feature
|
bipolar outflow
|
gptkbp:notable_features
|
bright outer shell
faint inner region
|
gptkbp:notable_for
|
visible in binoculars
its symmetrical shape
|
gptkbp:observational_equipment
|
gptkb:astronomy
|
gptkbp:photography
|
popular target for astrophotography
long exposure required for detail
|
gptkbp:research
|
amateur telescopes
observed since the 18th century
studied for stellar evolution
|
gptkbp:research_focus
|
planetary nebulae characteristics
|
gptkbp:research_importance
|
helps understand stellar life cycles
|
gptkbp:size
|
about 2.5 arcminutes across
|
gptkbp:storage
|
photometric measurements available
|
gptkbp:surrounding_area
|
gptkb:Milky_Way_Galaxy
|
gptkbp:type
|
gptkb:Nebula_Award
|
gptkbp:bfsParent
|
gptkb:Ring_Nebula
gptkb:Messier_27
gptkb:M27
|
gptkbp:bfsLayer
|
6
|