S Orionis adalah bintang cabang raksasa asimtotik di rasi bintang Orion, berjarak sekitar 480 parsec (1.600 tahun cahaya). Bintang ini memiliki kecerahan yang bervariasi dan tingkat paling cerah berkekuatan 7,2 dan terjadi setiap 14 setiap 14 bulan.[7]
Referensi
- ^ a b c d e Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752 . Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ^ a b c Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ a b c Wittkowski, M.; Boboltz, D. A.; Ohnaka, K.; Driebe, T.; Scholz, M. (2007). "The Mira variable S Orionis: Relationships between the photosphere, molecular layer, dust shell, and SiO maser shell at 4 epochs". Astronomy and Astrophysics. 470 (1): 191–210. arXiv:0705.4614 . Bibcode:2007A&A...470..191W. doi:10.1051/0004-6361:20077168.
- ^ a b Celis s., L. (1982). "Red variable stars. I - UBVRI photometry and photometric properties". Astronomical Journal. 87: 1791. Bibcode:1982AJ.....87.1791C. doi:10.1086/113268.
- ^ Uttenthaler, S.; Stiphout, K. V.; Voet, K.; Winckel, H. V.; Eck, S. V.; Jorissen, A.; Kerschbaum, F.; Raskin, G.; Prins, S. (2011). "The evolutionary state of Miras with changing pulsation periods". doi:10.1051/0004-6361/201116463.
- ^ Hamsten, Bengt; Stangl, Gerhard; Uttenthaler, Josef (2002-09). "Development trends for buses by MAN and Neoplan". ATZ worldwide. 104 (9): 7–11. doi:10.1007/bf03225177. ISSN 2192-9076.
- ^ Templeton, M. R.; Mattei, J. A.; Willson, L. A. (2005-08). "Secular Evolution in Mira Variable Pulsations". The Astronomical Journal. 130 (2): 776–788. doi:10.1086/431740. ISSN 0004-6256.
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