Statements (38)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
red supergiant |
| gptkbp:age |
420 million years
|
| gptkbp:apparentMagnitude |
1.98
|
| gptkbp:BayerDesignation |
gptkb:Alpha_Hydrae
|
| gptkbp:catalogue |
gptkb:2MASS_J09273523-0839317
gptkb:FK5_352 gptkb:GC_13013 gptkb:HD_81797 gptkb:HIP_46390 gptkb:SAO_136871 gptkb:WDS_J09277-0839A BD-08 2685 CD-08 2736 HR 3748 |
| gptkbp:colorIndexB-V |
+1.44
+1.68 |
| gptkbp:constellation |
gptkb:Hydra
|
| gptkbp:declination |
-08° 39′ 31.8″
|
| gptkbp:diameter |
50 solar radii
|
| gptkbp:distanceFromEarth |
177 light years
|
| https://www.w3.org/2000/01/rdf-schema#label |
Alpha Hydrae
|
| gptkbp:luminosity |
400 solar luminosities
|
| gptkbp:mass |
3 solar masses
|
| gptkbp:metallicity |
-0.03
|
| gptkbp:otherName |
gptkb:Alphard
Alpha Hya |
| gptkbp:parallax |
18.40 mas
|
| gptkbp:properMotionRA |
+33.46 mas/yr
-18.10 mas/yr |
| gptkbp:radialVelocity |
+55.5 km/s
|
| gptkbp:rightAscension |
09h 27m 35.24s
|
| gptkbp:singleStar |
yes
|
| gptkbp:spectralType |
K3II-III
|
| gptkbp:temperature |
4,000 K
|
| gptkbp:variableStar |
no
|
| gptkbp:bfsParent |
gptkb:Alphard
|
| gptkbp:bfsLayer |
6
|