Caldwell 57
E581398
Caldwell 57 is a dwarf irregular galaxy in the Local Group, better known as Barnard's Galaxy (NGC 6822), located in the constellation Sagittarius.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Caldwell 57 canonical | 2 |
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf | dwarf irregular galaxy ⓘ |
| alsoKnownAs |
Barnard's Galaxy
NERFINISHED
ⓘ
IC 4895 NERFINISHED ⓘ NGC 6822 NERFINISHED ⓘ |
| angularSize | 15.5 × 13.5 arcminutes ⓘ |
| apparentMagnitudeV | 9.3 ⓘ |
| catalog |
Caldwell catalogue
NERFINISHED
ⓘ
Index Catalogue ⓘ New General Catalogue NERFINISHED ⓘ |
| contains |
Cepheid variable stars
ⓘ
H II regions ⓘ planetary nebulae ⓘ young star clusters ⓘ |
| declination | −14° 48′ 12″ ⓘ |
| discoveredBy | Edward Emerson Barnard NERFINISHED ⓘ |
| discoveryYear | 1884 ⓘ |
| distanceFromEarth |
about 1.6 million light-years
ⓘ
about 500 kiloparsecs ⓘ |
| galacticLatitude | −18.4° ⓘ |
| galacticLongitude | 25.3° ⓘ |
| gasContent | rich in neutral hydrogen (H I) ⓘ |
| hasNotableRegion |
Hubble V
NERFINISHED
ⓘ
Hubble X NERFINISHED ⓘ |
| hasStarFormation | ongoing ⓘ |
| hasStellarPopulation |
Population I stars
NERFINISHED
ⓘ
Population II stars ⓘ |
| is | one of the nearest dwarf irregular galaxies outside the Milky Way ⓘ |
| locatedInConstellation | Sagittarius NERFINISHED ⓘ |
| mass | about 1×10^9 solar masses ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | low ⓘ |
| morphologicalType | IB(s)m ⓘ |
| namedAfter | Edward Emerson Barnard NERFINISHED ⓘ |
| observedWith |
Hubble Space Telescope
NERFINISHED
ⓘ
Very Large Telescope NERFINISHED ⓘ |
| orientation | seen nearly face-on ⓘ |
| radialVelocity | −57 km/s ⓘ |
| redshift | z = −0.000191 ⓘ |
| rightAscension | 19h 44m 57s ⓘ |
| surfaceBrightness | low ⓘ |
| usedFor | calibration of the cosmic distance scale ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.