Sextans Dwarf Spheroidal Galaxy
E471077
The Sextans Dwarf Spheroidal Galaxy is a faint, low-mass satellite galaxy of the Milky Way located in the constellation Sextans and composed primarily of old, metal-poor stars.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Sextans Dwarf Galaxy | 1 |
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
galaxy ⓘ satellite galaxy of the Milky Way ⓘ |
| absoluteMagnitudeV | ~−9.5 ⓘ |
| alternativeName |
PGC 3097820
NERFINISHED
ⓘ
Sextans Dwarf NERFINISHED ⓘ Sextans I NERFINISHED ⓘ Sextans dSph NERFINISHED ⓘ |
| angularSize_deg | ~1.7×1.2 ⓘ |
| apparentMagnitudeV | ~10.4 ⓘ |
| belongsTo | Milky Way halo NERFINISHED ⓘ |
| containsVariableStars | RR Lyrae NERFINISHED ⓘ |
| containsYoungStars | no significant population ⓘ |
| darkMatterDominated | true ⓘ |
| declination | −01° 36′ ⓘ |
| discoveredBy |
Mike Irwin
NERFINISHED
ⓘ
collaborators of Mike Irwin ⓘ |
| discoveryMethod | photographic survey of the southern sky ⓘ |
| discoveryYear | 1990 ⓘ |
| distanceFromEarth_ly | ~320000 ⓘ |
| distanceFromMilkyWayCenter_ly | ~290000 ⓘ |
| distanceFromSun_ly | ~320000 ⓘ |
| dominantStellarPopulationAge_Gyr | >10 ⓘ |
| dominantStellarType | old, low-mass stars ⓘ |
| environment | outer halo of the Milky Way ⓘ |
| galaxyType | dSph ⓘ |
| gasContent | very low ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| locatedInConstellation | Sextans NERFINISHED ⓘ |
| luminosity_solar | ~4×10^5 ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | low ⓘ |
| metallicity_Fe_H | ~−1.9 ⓘ |
| morphologicalType | dSph ⓘ |
| neutralHydrogenContent | undetected or extremely low ⓘ |
| notableProperty |
dominated by dark matter
ⓘ
extremely low surface brightness ⓘ very metal-poor stellar population ⓘ |
| orbitalStatus | bound satellite of the Milky Way ⓘ |
| radialVelocity_km_per_s | ~224 ⓘ |
| rightAscension | 10h 13m ⓘ |
| satelliteOf | Milky Way NERFINISHED ⓘ |
| starFormationActivity | quiescent ⓘ |
| stellarMass_solar | ~5×10^6 ⓘ |
| stellarPopulation | old ⓘ |
| surfaceBrightness | very low ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Sextans Dwarf Galaxy