UGC 668
E514341
UGC 668 is a dwarf irregular galaxy in the Local Group, better known as IC 1613, notable for its relative isolation and use in calibrating the cosmic distance scale.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | dwarf irregular galaxy ⓘ |
| absoluteMagnitudeV | about −15.3 ⓘ |
| alsoKnownAs |
Caldwell 51
NERFINISHED
ⓘ
IC 1613 NERFINISHED ⓘ |
| angularSize | about 16.2 × 14.5 arcminutes ⓘ |
| apparentMagnitudeV | about 9.9 ⓘ |
| belongsTo | Local Group dwarf galaxies NERFINISHED ⓘ |
| catalog |
Caldwell
NERFINISHED
ⓘ
IC NERFINISHED ⓘ UGC NERFINISHED ⓘ |
| catalogNumber |
Caldwell 51
NERFINISHED
ⓘ
IC 1613 NERFINISHED ⓘ UGC 668 NERFINISHED ⓘ |
| contains |
Cepheid variable stars
ⓘ
H II regions ⓘ RR Lyrae variable stars NERFINISHED ⓘ red giant branch stars ⓘ |
| declination | +02° 07′ 04″ ⓘ |
| discoveredBy | Max Wolf NERFINISHED ⓘ |
| discoveryYear | 1906 ⓘ |
| distanceFromEarth |
about 224 kiloparsecs
ⓘ
about 730000 light-years ⓘ |
| galaxyType | Magellanic-type irregular galaxy ⓘ |
| hasNeutralHydrogenMass | on the order of 10^8 solar masses ⓘ |
| hasProperty |
gas-rich
ⓘ
low internal extinction ⓘ low metallicity ⓘ relatively isolated galaxy ⓘ well-resolved stellar population ⓘ |
| hasStarFormation | ongoing ⓘ |
| inclination | about 38 degrees ⓘ |
| locatedInConstellation | Cetus NERFINISHED ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | about 1/10 solar ⓘ |
| morphologicalType | IB(s)m ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| positionAngle | about 58 degrees ⓘ |
| radialVelocity | about −234 km/s ⓘ |
| rightAscension | 01h 04m 47s ⓘ |
| stellarMass | on the order of 10^8 solar masses ⓘ |
| usedFor |
Cepheid period–luminosity relation calibration
ⓘ
RR Lyrae distance calibration ⓘ Tip of the Red Giant Branch distance calibration ⓘ calibration of the cosmic distance scale ⓘ studies of stellar evolution in low-metallicity environments ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.