44 Her
- 44 Her
-
Eta Herculis
η Herculis
Sofian, Sophian |
Données d'observation
(Époque J2000.0) |
| Ascension droite |
16h 42m 53.7653s |
| Déclinaison |
+38° 55′ 20.116″ |
| Constellation |
Hercule |
| Magnitude apparente |
3,487 |
| Caractéristiques |
| Type spectral |
G7.5IIIb |
| Indice U-B |
0,60 |
| Indice B-V |
0,92 |
| Indice R-I |
0,48 |
| Variabilité |
? |
| Astrométrie |
| Vitesse radiale |
8,3 km/s |
| Mouvement propre |
μα=35,58 mas/a
μδ=-84,98 mas/a |
| Parallaxe |
29,11 ± 0,52 mas |
| Distance |
112 al |
| Magnitude absolue |
0,80 |
| Caractéristiques physiques |
| Masse |
2,3 M☉ |
| Rayon |
9,8 R☉ |
| Gravité de surface (log g) |
? |
| Luminosité |
50 L☉ |
| Température |
4 900 K |
| Métallicité |
? |
| Rotation |
? |
| Âge |
~1×109 a
|
| Autres désignations |
| HD 150997, HIP 81833, HR 6220, FK5 626, BD+39 3029, SAO 65504, GJ 636 |
Eta Herculis (η Herculis / η Her) est une étoile située dans la partie septentrionale de la constellation d'Hercule. Elle correspond au coin supérieur droit du trapèze d'Hercule, le groupe d'étoiles le plus reconnaissable de cette constellation. En astronomie chinoise, elle fait partie de l'astérisme Qigong, représentant sept ducs.
Voir aussi
Liens externes
Portail de l’astronomie
Catégories : Constellation d'Hercule | Étoile de type spectral GIII
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