Stephenson 2-18

Stephenson 2-18 (St2-18), uga dikenal minangka Stephenson 2 DFK 1 utawa RSGC2-18, minangka lintang raksasa super abang ing rasi lintang Scutum. Dumunung ing cedhak kluster terbuka Stephenson 2, sing dununge udakara 6.000 parsek (20.000 taun cahya) saka Donya, lan dianggep minangka salah sawijining klompok lintang kanthi jarak sing padha. Lintang iki kalebu lintang sing paling misuwur, yen dudu lintang paling gedhe, lan salah sawijining raksasa super abang sing paling padhang, kanthi radius kira-kira udakara 2,150 kali tinimbang Matahari (R☉), sing jumbuh karo volume udakara 10 milyar kali luwih gedhe tinimbang Srengenge. Yen diselehake ing tengah Sistem Surya, bageyan fotosfer lintang iki bakal ngambah orbit planet Saturnus.^[1][2][3]

Bidhang lintang kandhel ing sakubenge lintang raksasa super abang St2-18 (lintang paling padhang ing gambar) kaya sing dideleng saka survey 2MASS survey astronomi. Gambar kasebut diterbitake ing taun 2003. (Université de Strasbourg/CNRS)

Bandhingane Stephenson 2-18 lan VY Canis Majoris.

Rujukan

1. Davies, B.; Figer, D. F.; Kudritzki, R. P.; MacKenty, J.; Najarro, F.; Herrero, A. (2007). "A Massive Cluster of Red Supergiants at the Base of the Scutum‐Crux Arm". The Astrophysical Journal. 671 (1): 781–801. arXiv:0708.0821. Bibcode:2007ApJ...671..781D. doi:10.1086/522224. S2CID 1447781.
2. Stephenson, C. B. (1990). "A possible new and very remote galactic cluster". The Astronomical Journal. 99: 1867. Bibcode:1990AJ.....99.1867S. doi:10.1086/115464.
3. Negueruela, I.; González-Fernández, C.; Marco, A.; Clark, J. S.; Martínez-Núñez, S. (2010). "Another cluster of red supergiants close to RSGC1". Astronomy and Astrophysics. 513: A74. arXiv:1002.1823. Bibcode:2010A&A...513A..74N. doi:10.1051/0004-6361/200913373.