Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
supernova
|
| gptkbp:age |
about 350 years
|
| gptkbp:alternativeName |
gptkb:Cassiopeia_A
|
| gptkbp:catalogueNumber |
gptkb:3C_461
|
| gptkbp:contains |
white dwarf
|
| gptkbp:declination |
+58° 48′ 54″
|
| gptkbp:discoveredBy |
gptkb:John_Flamsteed
|
| gptkbp:discoveredIn |
1680
|
| gptkbp:distanceFromEarth |
about 11,000 light-years
|
| gptkbp:expandingShellVelocity |
about 4,000–6,000 km/s
|
| gptkbp:hasViewOf |
optical wavelengths
X-ray wavelengths radio wavelengths |
| gptkbp:hostedBy |
gptkb:Milky_Way
|
| https://www.w3.org/2000/01/rdf-schema#label |
Cas A
|
| gptkbp:locatedIn |
constellation Cassiopeia
|
| gptkbp:notableFeature |
brightest extrasolar radio source at frequencies above 1 GHz
|
| gptkbp:rightAscension |
23h 23m 24s
|
| gptkbp:supernovaExplosionDate |
circa 1670s
|
| gptkbp:type |
Type IIb supernova remnant
|
| gptkbp:usedFor |
radio astronomy calibration
|
| gptkbp:bfsParent |
gptkb:Cassiopeia_A
|
| gptkbp:bfsLayer |
7
|