Sigma Orionis or Sigma Ori (σ Orionis, σ Ori) is a multiple star system in the constellation Orion, consisting of the brightest members of a young open...

Notable examples include: Sigma Canis Majoris Sigma Draconis Sigma Octantis Sigma Orionis Sigma FC, a Canadian soccer team SK Sigma Olomouc, a Czech association...

predominantly behind the nebula, and caused by the nearby bright star Sigma Orionis. Magnetic fields channel the gases, leaving the nebula into streams...

and Pi Orionis), and instead of an arm marked out by Mu Orionis, he holds a club (Chi Orionis). His right leg is represented by Theta Orionis and his...

HD 57682, 14 Cephei, 10 Lacertae) and 3 O9.5 V standards (HD 34078, Sigma Orionis, Zeta Ophiuchi). An important review on spectral classification by Morgan...

4 visibly bright O-type stars are Gamma Velorum, Alnitak (Zeta Orionis), Mintaka (Delta Orionis), and Zeta Puppis. The corona present in other spectral types...

region that is being ionized by ultraviolet radiation from the nearby Sigma Orionis (σ Ori) multi-star system. An additional half dozen stars provide further...

and Haas SAP AG, SAP Labs France Scaleo chip Sequans Communications Sigma Orionis SA, the oldest spin-off company of Sophia Antipolis (founded in 1984...

et al. (2006). "A search for substellar members in the Praesepe and Sigma Orionis clusters". Astronomy & Astrophysics. 460 (3): 799–810. arXiv:astro-ph/0609283...

The HH 1165 jet launched by the brown dwarf Mayrit 1701117 in the outer periphery of the sigma Orionis cluster...

iPMOs with disks or accretion are Lupus I, Rho Ophiuchi Cloud Complex, Sigma Orionis cluster, Orion Nebula, Taurus, NGC 1333 and IC 348. A large survey of...

Sigma Octantis is a solitary star in the Octans constellation that forms the pole star of the Southern Hemisphere. Its name is also written as σ Octantis...

(2016-12-05). "Orbits, Distance, and Stellar Masses of the Massive Triple Star Sigma Orionis". The Astronomical Journal. 152 (6): 213. arXiv:1610.01984. Bibcode:2016AJ...

Mintaka A (Delta Orionis, 34 Orionis) 1,200 3 O9.5II 2.5 Alnitak (Zeta Orionis, 50 Orionis) 1,260 ± 180 3 O9.5Iab 1.77 Sigma Orionis A 1263±4.3 2 O9.5V...

(2000). "Discovery of Young, Isolated Planetary Mass Objects in the Sigma Orionis Star Cluster". Division of Geological and Planetary Sciences, California...

0.8 light-years (0.26 parsec) and is located in the vicinity of the sigma Orionis cluster. Previously only small mini-jets (≤0.03 parsec) were found around...

Herbig–Haro objects Orion OB1 association Orion's Belt Sigma Ori cluster 25 Ori cluster Lambda Orionis molecular ring (Sh2-264) Lambda Ori cluster Barnard...

B2Vn 0.52 273 HD 145792 6.42 B6IV 1.70 144 HD 37017 6.56 B1.5V 380 Sigma Orionis E 6.61 B2Vp 1.19 329 HD 37776 6.96 B2V 1.54 330 HD 37058 7.30 B3Vp 15...

O4I(n)fp Alnilam (Epsilon Orionis) B-type supergiant, spectral type B0Ia, central star of Orion's Belt Saiph (Kappa Orionis) B-type supergiant, spectral...

much dimmer magnitude 5.5 star on its southern axis, Polaris Australis (Sigma Octantis). From around 1700 BC until just after 300 AD, Kochab (Beta Ursae...

1-023626 is a mid-T type astronomical object in the foreground of the σ Orionis cluster, which is approximately 1,150 light-years from Earth. It was discovered...

Belt and Sword of Orion. The end of the handle is at ι Orionis, with the far rim at η Orionis.[citation needed] The four central stars in Hercules, Epsilon...

are some exceptions such as the chain of stars π1, π2, π3, π4, π5 and π6 Orionis. The most stars given the same Bayer designation but with an extra number...

A visual band light curve for V1352 Orionis, adapted from Weis (1994)...

a mere 300,000 years old composed of two pre-main-sequence stars—a FU Orionis star and a Herbig Ae/Be star, which has brightened episodically by two...

Star 3.190 Pi3 Orionis Star 3.20 Kappa Ophiuchi Star Suspected variable star 3.21 3.18 Gamma Cephei Binary star system 3.21 3.20 Sigma Librae Star 3.21...

closest core-collapse supernova candidates to Earth. Bellatrix (Gamma Orionis) 250 ± 10 1 B2 III 1.64 One of the closest core-collapse supernova candidates...

possilbility that this size might be a bit overestimated (on the order of 1 sigma). Hence, the quoted radius might be just an upper limit. AH Scorpii 1,411±124...

Hayashi track Hayashi limit Henyey track Orion variable T Tauri star FU Orionis star Herbig Ae/Be Luminosity class Subdwarf star Dwarf star Blue dwarf...

1 A3Vp 3.28 Beta Carinae (Miaplacidus) 113.2 ± 0.4 1 A1 III +1.69 Phi2 Orionis 113.8 ± 0.7 1 G8 III-IV +4.081 Iota Cephei 115 1 K0III Zeta Pictoris 116...