Statements (58)
| Predicate | Object |
|---|---|
| gptkbp:instance_of |
gptkb:nebula
|
| gptkbp:bfsLayer |
4
|
| gptkbp:bfsParent |
gptkb:Type_II_supernova
|
| gptkbp:apparent_magnitude |
maximum magnitude of about -17.5
|
| gptkbp:associated_with |
gptkb:Type_II_supernovae
|
| gptkbp:collaborations |
international research teams
various astronomical observatories NASA and ESA missions amateur astronomers for observations |
| gptkbp:conference |
discussed in various astrophysics conferences
|
| gptkbp:conservation_efforts |
gptkb:nebula
growing over time shell-type remnant contains various elements from progenitor star |
| gptkbp:discovered_by |
gptkb:Robert_P._Kirshner
in the constellation Cygnus |
| gptkbp:distance |
Tying to Cepheid variables
approximately 6.5 million light-years |
| gptkbp:duration |
several months
|
| gptkbp:events |
conducted for years after explosion
|
| gptkbp:expansion_plans |
approximately 5000 km/s
|
| gptkbp:has_luminosity |
around 10^42 watts
|
| gptkbp:has_spectral_type |
analyzed for chemical composition
hydrogen-rich spectrum strong hydrogen lines |
| gptkbp:historical_context |
part of a long history of supernova observations
|
| gptkbp:hosts |
gptkb:NGC_6946
|
| https://www.w3.org/2000/01/rdf-schema#label |
SN 2004et
|
| gptkbp:impact |
enhanced understanding of supernova mechanisms
influenced supernova modeling techniques |
| gptkbp:is_observed_in |
gptkb:Hubble_Space_Telescope
still being studied today |
| gptkbp:length |
2004-10-05
|
| gptkbp:lighting |
monitored for changes over time
exhibited a plateau phase used to predict future behavior plateau light curve occurred about 30 days after explosion used to estimate explosion energy used to study progenitor stars |
| gptkbp:mass |
between 8 and 15 solar masses
|
| gptkbp:material |
produced heavy elements during explosion
|
| gptkbp:notable_for |
one of the best-studied supernovae
|
| gptkbp:power_output |
approximately 10^51 ergs
analyzed in various wavelengths |
| gptkbp:publishes |
numerous papers published about it
|
| gptkbp:redshift |
0.0015
|
| gptkbp:research |
2004 to 2005
extensive photometric and spectroscopic data due to distance and brightness variations extensive follow-up studies conducted optical and infrared observations |
| gptkbp:scientific_classification |
Type II-P
important for understanding supernova types |
| gptkbp:significance |
contributes to understanding of stellar evolution
|
| gptkbp:storage |
collected by various telescopes
|
| gptkbp:type |
Type II-P supernova
|
| gptkbp:year_created |
2004-10-05
|