Theta Eridani
E563302
Theta Eridani is a bright binary star system in the constellation Eridanus, visible to the naked eye and often used as a reference point in the southern sky.
Observed surface forms (3)
| Surface form | Occurrences |
|---|---|
| Theta Eridani A | 0 |
| Theta Eridani B | 0 |
| Acamar | 0 |
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
binary star system
ⓘ
traditional star name ⓘ |
| absoluteMagnitudeV | about −0.6 ⓘ |
| apparentMagnitudeV |
2.88
ⓘ
3.2 ⓘ 4.3 ⓘ |
| bayerDesignation | θ Eridani ⓘ |
| colorIndexBminusV | about +0.09 ⓘ |
| component |
Theta Eridani A
NERFINISHED
ⓘ
Theta Eridani B NERFINISHED ⓘ |
| constellation | Eridanus NERFINISHED ⓘ |
| culturalSignificance | used in celestial navigation in the southern hemisphere ⓘ |
| declination | −40° 00′ 36″ ⓘ |
| discoverer | John Herschel NERFINISHED ⓘ |
| discoveryType | binary nature discovered by telescope observation ⓘ |
| distanceFromEarth_ly | 161 ⓘ |
| distanceFromEarth_pc | 49.4 ⓘ |
| effectiveTemperature_K | about 8200 ⓘ |
| epoch | J2000.0 ⓘ |
| equatorialCoordinateSystem | ICRS NERFINISHED ⓘ |
| flamsteedDesignation | 41 Eridani NERFINISHED ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasTraditionalName | Acamar NERFINISHED ⓘ |
| hemisphereVisibility | southern ⓘ |
| IAUConstellation | Eridanus NERFINISHED ⓘ |
| luminosityClass |
main-sequence
ⓘ
subgiant ⓘ |
| mass_solar | about 2.0 ⓘ |
| otherName |
Acamar
NERFINISHED
ⓘ
Theta Eri NERFINISHED ⓘ θ Eridani NERFINISHED ⓘ |
| properMotionDec_masPerYear | −1 ⓘ |
| properMotionRA_masPerYear | +37 ⓘ |
| radialVelocity_kmPerSec | about +10 ⓘ |
| refersTo | Theta Eridani NERFINISHED ⓘ |
| rightAscension | 03h 11m 37.6s ⓘ |
| separation_arcseconds | about 8 ⓘ |
| spectralType |
A1V
ⓘ
A4IV ⓘ A4IV ⓘ |
| systemType | visual binary ⓘ |
| use | reference point in the southern sky ⓘ |
| variableStar | no ⓘ |
| visibility | visible to the naked eye ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.