Statements (88)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:open_cluster
gptkb:Nebula_Award gptkb:star |
| gptkbp:age |
approximately 1,500 years
about 1,500 years around 1,500 years |
| gptkbp:apparent_magnitude |
8.6
8.9 |
| gptkbp:associated_with |
stellar evolution
|
| gptkbp:base_notes |
bright and well-defined
|
| gptkbp:color |
blue-green
|
| gptkbp:composed_by |
hydrogen and helium
|
| gptkbp:contains |
central star
|
| gptkbp:contains_star |
a white dwarf
|
| gptkbp:coordinates |
RA 10h 24m 24s, Dec -18° 38' 18"
RA 10h 24m 24s, Dec -18° 58' 00" |
| gptkbp:cultural_significance |
popular among amateur astronomers
featured in astronomy literature subject of astrophotography |
| gptkbp:declination |
-18° 38' 18"
-18° 58' 36" |
| gptkbp:diameter |
about 0.5 light-years
0.5 arcminutes about 0.5 light years |
| gptkbp:discovered_by |
gptkb:William_Herschel
|
| gptkbp:discovery_year |
gptkb:1785
1784 |
| gptkbp:distance_from_earth |
about 1,600 light years
1,600 light years about 1,600 light-years |
| gptkbp:emissions_standard |
H-alpha
H-alpha emission [ O III] [ N II] |
| gptkbp:exhibition |
gptkb:New_General_Catalogue
gptkb:Messier_catalog |
| gptkbp:expansion_plans |
30 km/s
|
| gptkbp:features |
ring structure
central star bipolar outflow bright central star |
| gptkbp:has_color |
0.5
|
| gptkbp:has_spectral_type |
O-type star
|
| gptkbp:historical_significance |
one of the brightest planetary nebulae
|
| https://www.w3.org/2000/01/rdf-schema#label |
NGC 3242
|
| gptkbp:image |
Hubble Space Telescope image available
Hubble Space Telescope image X-ray image available ground-based telescope image available infrared image available |
| gptkbp:is_located_in |
constellation Hydra
|
| gptkbp:is_observed_in |
gptkb:Chandra_X-ray_Observatory
gptkb:Hubble_Space_Telescope amateur astronomers |
| gptkbp:is_visible_from |
best viewed in spring
requires telescope for observation |
| gptkbp:known_as |
gptkb:The_Ghost_of_Jupiter
gptkb:Ghost_of_Jupiter |
| gptkbp:lighting |
variable brightness
high surface brightness |
| gptkbp:located_in |
constellation Hydra
|
| gptkbp:mass |
0.6 solar masses
|
| gptkbp:notable_feature |
ring structure
complex morphology bright outer shell faint halo highly symmetrical structure multiple knots of emission |
| gptkbp:observational_equipment |
small telescopes
|
| gptkbp:photometric_type |
planetary nebula type II
|
| gptkbp:planetary_nebula_type |
gptkb:Type_I
|
| gptkbp:redshift |
0.0001
|
| gptkbp:research |
gptkb:spectroscopy
photometry imaging photometry available spectroscopy available |
| gptkbp:research_importance |
study of stellar evolution
study of chemical composition study of nebular dynamics study of white dwarf stars |
| gptkbp:research_interest |
stellar wind dynamics
|
| gptkbp:right_ascension |
10h 24m 24s
|
| gptkbp:size |
about 2 arcminutes across
|
| gptkbp:storage |
B-V color index 0.5
|
| gptkbp:type |
gptkb:Nebula_Award
|
| gptkbp:bfsParent |
gptkb:Hydra_constellation
|
| gptkbp:bfsLayer |
5
|