| Hamal
|
|
| Die ligging van Hamal (in die rooi sirkel).
|
| Sterrebeeld |
Ram
|
| Bayer-naam |
Alpha Arietis
|
| Spektraaltipe |
K2 III Ca-1
|
| Soort |
Reusester
|
| Waarnemingsdata (Epog J2000)
|
| Regte klimming |
02h 07m 10.40570s[1]
|
| Deklinasie |
+23° 27′ 44.7032″[1]
|
| Skynmagnitude (m) |
2[2]
|
| Absolute magnitude (M) |
+0,47 ± 0,04[3]
|
| B-V-kleurindeks |
+1,15[2]
|
| U-B-kleurindeks |
+1,13[2]
|
| Besonderhede
|
| Massa (M☉) |
1,5 ± 0,2[4]
|
| Radius (R☉) |
14,9 ± 0,3[5]
|
| Ligsterkte (L☉) |
91 ± 6[5]
|
| Ouderdom (jaar) |
3,4 ± 1,9[6]
|
| Temperatuur (K) |
4 480[5]
|
| Rotasiespoed (km/s) |
3,44[4]
|
| Metaalinhoud [Fe/H] |
-0,25[5]
|
| Eienskappe
|
| Veranderlikheid |
Vermoedelik[7]
|
| Ander name
|
| Hemal, Hamal, α Ari, Alpha Arietis, 13 Arietis, BD+22 306, FK5 74, GC 2538, GJ 84.3, GJ 9072, HD 12929, HIP 9884, HR 617, LTT 10711, NLTT 7032, PPM 91373, SAO 75151[8]
|
|
|
Hamal (ook Alpha Arietis of α Ari genoem) is die helderste ster in die sterrebeeld Ram (Aries).[8][9] Met ’n skynbare magnitude van 2[2] is dit een van die helderste sterre aan die naghemel. Dié reusester, wat dalk ’n planeet het met ’n massa groter as Jupiter s’n,[4] is sowat 65,8 ligjare van die Sonnestelsel af.[1]
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