Thank you! If you have any feedback, please get in contact. All Constellations ». Azimuth: Max altitude: Betelgeuse , the second brightest star in Orion — according to the night sky guide website In-The-Sky. Bellatrix serves as Orion's left shoulder.
Other stars in the constellation include Hatsya, which establishes the tip of Orion's sword that hangs off the belt, and Meissa, which forms Orion's head. Saiph serves as Orion's right knee. Rigel , Orion's brightest star, forms the hunter's left knee. With one exception, all of the main stars in Orion are bright young blue giants or supergiants, ranging in distance from Bellatrix light-years to Alnilam 1, light-years.
The Orion Nebula is located around 1, light-years away from Earth. One light-year is the distance light travels in a single year, about 6 trillion miles 10 trillion kilometers. The exception is the star Betelgeuse , which is a red giant and one of the largest stars known. It is also the only star in the sky large enough and close enough to have been imaged as a disk in the Hubble Space Telescope. Observers with a keen eye should be able to see the difference in color between Betelgeuse and all the other stars in Orion.
The Orion Constellation is home to many interesting stargazing targets, we explore a handful of them here. Though some of these targets can be seen with the naked eye, for a better view we recommend using binoculars or a telescope. If you need equipment, our best binoculars and best telescopes guides may help. Magnitude: An object's magnitude tells you how bright an object is as it appears from the Earth.
In astronomy, magnitudes are represented on a numbered scale. Quite confusingly the lower the number, the bright the object. Sigma Orionis D and E are also dwarfs. Both belong to the spectral type B2V and their respective magnitudes are 6. Sigma Orionis E is notable for being exceptionally rich in helium. With an apparent magnitude of 3. Chi-1 Orionis is a main sequence dwarf, only 28 light years distant from Earth.
It belongs to the spectral type G0V and has an apparent magnitude of 4. It has a faint red dwarf for a companion, with an orbital period of Gliese is an orange dwarf, belonging to the spectral class K7. The star is believed to have passed only 5 light years from the Sun approximately , years ago. The nebula has a huge hole of empty space appearing as a black patch in its central region.
The reason why the patch appears black has not yet been determined, but one theory suggests that narrow jets of gas from the neighbouring young stars may have punctured the sheet of dust and gas in the nebula and strong radiation from an older star in the region may have helped create the hole.
The nebula lies about 1, light years from Earth. V Orionis belongs to the spectral type A0 and is approximately 1, light years distant. GJ is the nearest Orion star to the solar system. It is located only It is a red dwarf, belonging to the spectral class M3. GJ is believed to have come within 4.
The Orion Molecular Cloud Complex, or simply the Orion Complex, is comprised of a large group of dark clouds, bright emission and reflection nebulae, dark nebulae, H II regions large clouds showing recent star forming activity and young stars in the constellation Orion. The Orion Complex is between 1, and 1, light years distant.
Several parts of it — the famous Orion Nebula, for one — can be seen without binoculars. The nebula is one of the brightest ones in the sky and can be seen without binoculars. It has a visual magnitude of 4. Messier 42 is the nearest known region of massive star formation to the solar system.
It is part of the Orion Molecular Cloud Cluster. The Orion Nebula contains the Trapezium, or the Orion Trapezium Cluster , a very young open cluster easily recognizable by its four brightest stars, which form a trapezium-shaped asterism. The Trapezium Cluster is a young, tight open star cluster located in the centre of the Orion Nebula. It is 47 arc seconds in size and has an apparent magnitude of 4.
The cluster was first discovered by Galileo Galilei on February 4, He drew three of the stars A, C and D , and the fourth one was added by observers in By , eight stars were discovered in the cluster. The brightest five emit most of the light that illuminates the surrounding nebula. The Trapezium Cluster is easily identifiable in the sky by the asterism formed by the four brightest stars, A, B, C and D. Schneider, E.
Young, G. Rieke, A. Cotera, H. Chen, M. Rieke, R. Wong Rice University. The brightest and most massive star in the cluster, component C, is Theta-1 Orionis C, a blue main sequence star belonging to the spectral class O6pe V. The star has a visual magnitude of 5. It is one of the most luminous stars known, with an absolute magnitude of Theta-1 Orionis C is also the star with the highest surface temperature of any star that is visible to the unaided eye: 45, K.
Charles Messier later designated the nebulosity Messier 43 and included it in his catalogue. It has an apparent magnitude of 9. The nebula is located about seven arc minutes north of the Trapezium cluster.
Messier 78 is a reflection nebula in Orion. The nebula surrounds two 10th magnitude stars and can easily be found in a small telescope. It also contains some 45 T Tauri type variables, young stars still in the process of formation. The Horsehead Nebula, also known as Barnard 33 , is a famous dark nebula in Orion.
It is located south of Alnitak, in the bright emission nebula IC The Horsehead Nebula is approximately 1, light years distant. It was discovered by the American astronomer Williamina Fleming in The nebula got the name Horsehead because of the shape formed by the dark dust clouds and gases, one that resembles the head of a horse when observed from Earth. The nebula has an an apparent magnitude of 5 and is about 1, light years distant from the solar system.
It is believed to have originated in a supernova event about two million years ago. Barnard, the astrophotographer who photographed the nebula and published a description in It appears as a large arc centred on Messier 42 the Orion Nebula. The loop is believed to be ionized by the stars located in the Orion Nebula.
The Flame Nebula is an emission nebula in Orion. It has a visual magnitude of 2. Alnitak emits ultraviolet light into the nebula, knocking electrons away from the hydrogen gas clouds inside the nebula, and the glow of the nebula is the result of the electrons and ionized hydrogen recombining.
NGC is an open star cluster, approximately 3, light years away from the solar system. It has an apparent magnitude of 5. In February and early March, Orion will be visible in the eastern sky as soon as the Sun sets, sweeping south in the northern hemisphere then setting in the west in the early hours of the morning. In the southern hemisphere, Orion will be visible in the north, appearing upside-down compared to how it looks in the northern hemisphere.
The nebula is halfway down the sword and will appear as a fuzzy-looking star. Looking for stargazing tips?
0コメント