Hubble’s Variable Nebula
E545070
Hubble’s Variable Nebula is a reflection nebula in the constellation Monoceros whose brightness and shape appear to change over time due to variable illumination from its central star.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
nebula
ⓘ
reflection nebula ⓘ |
| alsoKnownAs |
Caldwell 46
NERFINISHED
ⓘ
Hubble Variable Nebula NERFINISHED ⓘ NGC 2261 NERFINISHED ⓘ |
| angularSize | ~2.0′ × 1.0′ ⓘ |
| apparentMagnitudeV | 9.0 ⓘ |
| associatedWith |
Herbig Ae/Be star
ⓘ
young stellar object ⓘ |
| bestSeenIn |
long-exposure astrophotography
ⓘ
small telescopes ⓘ |
| catalog |
Caldwell
NERFINISHED
ⓘ
NGC NERFINISHED ⓘ |
| catalogNumber |
C 46
NERFINISHED
ⓘ
NGC 2261 NERFINISHED ⓘ |
| DecEpoch | J2000 ⓘ |
| declination | +08° 44′ 10″ ⓘ |
| discoveredBy | William Herschel NERFINISHED ⓘ |
| discoveryDate | 1783 ⓘ |
| distanceFromEarth |
~2500 light-years
ⓘ
~760 parsecs ⓘ |
| hasCentralStar | R Monocerotis NERFINISHED ⓘ |
| hasIlluminationMechanism | starlight scattering off dust ⓘ |
| hasMorphology |
cometary nebula
ⓘ
fan-shaped ⓘ |
| illuminatedBy | R Monocerotis NERFINISHED ⓘ |
| inGalacticHemisphere | northern sky ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Arm NERFINISHED ⓘ |
| locatedInConstellation | Monoceros NERFINISHED ⓘ |
| namedAfter | Edwin Hubble NERFINISHED ⓘ |
| namedForReason | studied extensively by Edwin Hubble ⓘ |
| nebulaType | reflection ⓘ |
| notableFor |
variable brightness
ⓘ
variable shape ⓘ |
| observedBy | Edwin Hubble NERFINISHED ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| partOf | Monoceros star-forming region NERFINISHED ⓘ |
| RAEpoch | J2000 ⓘ |
| rightAscension | 06h 39m 10s ⓘ |
| shows | light echoes ⓘ |
| spectralTypeOfIlluminatingStar | B8e ⓘ |
| variabilityCause | variable illumination from R Monocerotis ⓘ |
| variabilityTimescale | days to months ⓘ |
| visibleFrom | Earth NERFINISHED ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.