Alnilam

Alnilam
Alnilam verlig NGC 1990 (foto deur Glen Youman).
Sterrebeeld	Jagter
Spektraaltipe	B0 Ia[1]
Soort	Blouwit superreus
Waarnemingsdata (Epog J2000)
Regte klimming	05h 36m 12.8s[2]
Deklinasie	-01° 12′ 06.9″[2]
Skynmagnitude (m)	1,69[3] (1,64-1,74[4])
Absolute magnitude (M)	-6,95[5]
B-V-kleurindeks	-0,18[3]
U-B-kleurindeks	-1,03[3]
Besonderhede
Massa (M☉)	30-64,5[6]
Radius (R☉)	42[6]
Ligsterkte (L☉)	832 000[6]
Ouderdom (jaar)	5,7 miljoen[7]
Temperatuur (K)	27 000[6][8]
Rotasiespoed (km/s)	40-70[6]
Eienskappe
Veranderlikheid	α Cygni[4]
Ander name
ε Ori, 46 Orionis, 112 G Orionis, HR 1903, BD -01°969, HD 37128, SAO 132346, FK5 210, HIP 26311, TD1 4963
Portaal    Sterrekunde

Alnilam, ook bekend as Epsilon Orionis en 46 Orionis, is ’n groot blou superreus sowat 2 000 ligjare van die Aarde af in die sterrebeeld Jagter. Dit is na raming 275 000 tot 537 000 keer so helder soos die Son, en sy massa is omtrent 34 keer dié van die Son.

1. ↑ Verwysingfout: Invalid <ref> tag; no text was provided for refs named mkk
2. ↑ ^{2,0 2,1} van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
3. ↑ ^{3,0 3,1 3,2} Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
4. ↑ ^{4,0 4,1} Ruban, E. V.; Alekseeva, G. A.; Arkharov, A. A.; Hagen-Thorn, E. I.; Galkin, V. D.; Nikanorova, I. N.; Novikov, V. V.; Pakhomov, V. P.; Puzakova, T. Yu. (September 2006). "Spectrophotometric observations of variable stars". Astronomy Letters. 32 (9): 604–607. Bibcode:2006AstL...32..604R. doi:10.1134/S1063773706090052.
5. ↑ Searle, S. C.; Prinja, R. K.; Massa, D.; Ryans, R. (2008). "Quantitative studies of the optical and UV spectra of Galactic early B supergiants. I. Fundamental parameters". Astronomy and Astrophysics. 481 (3): 777–97. arXiv:0801.4289. Bibcode:2008A&A...481..777S. doi:10.1051/0004-6361:20077125.
6. ↑ ^{6,0 6,1 6,2 6,3 6,4} Raul E. Puebla; D. John Hillier; Janos Zsargó; David H. Cohen; Maurice A. Leutenegger (2015). "X-ray, UV and optical analysis of supergiants: ε Ori". Monthly Notices of the Royal Astronomical Society. 456 (3): 2907. arXiv:1511.09365. Bibcode:2016MNRAS.456.2907P. doi:10.1093/mnras/stv2783.
7. ↑ Voss, R.; Diehl, R.; Vink, J. S.; Hartmann, D. H. (2010). "Probing the evolving massive star population in Orion with kinematic and radioactive tracers". Astronomy and Astrophysics. 520: 10. arXiv:1005.3827. Bibcode:2010A&A...520A..51V. doi:10.1051/0004-6361/201014408. A51.
8. ↑ Verwysingfout: Invalid <ref> tag; no text was provided for refs named crowther