Statements (22)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:nebula
|
| gptkbp:apparent_magnitude |
maximum magnitude of about -17.5
|
| gptkbp:bomb_load |
core-collapse
|
| gptkbp:conservation_efforts |
gptkb:nebula
|
| gptkbp:discovered_by |
gptkb:Robert_Kirshner
|
| gptkbp:distance |
approximately 20 million light-years
|
| gptkbp:has_luminosity |
approximately 10^9 L☉
|
| gptkbp:has_spectral_type |
Hydrogen-rich spectrum
|
| gptkbp:hosts |
gptkb:NGC_1637
|
| https://www.w3.org/2000/01/rdf-schema#label |
SN 1999em
|
| gptkbp:is_observed_in |
gptkb:Hubble_Space_Telescope
|
| gptkbp:length |
1999-10-30
|
| gptkbp:lighting |
gptkb:mountain
plateau phase |
| gptkbp:located_in |
gptkb:NGC_1637
|
| gptkbp:redshift |
0.0055
|
| gptkbp:research |
photometric and spectroscopic data
|
| gptkbp:type |
Type II-P supernova
|
| gptkbp:year_created |
1999-10-30
|
| gptkbp:bfsParent |
gptkb:M74
gptkb:Type_II_supernova |
| gptkbp:bfsLayer |
4
|