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π Arietis
Pi Arietis is a multiple star system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from π Arietis, and abbreviated Pi Ari or π Ari. Based upon parallax measurements made during the Hipparcos mission, this system is approximately distant from Earth, and has an apparent visual magnitude of 5.314. This is bright enough to be faintly seen with the naked eye. The position of this system near the ecliptic means it is subject to lunar occultation. The primary member of this system is an intermediate-mass, B-type main sequence star with a stellar classification of B6 V. It is a close, single-lined spectroscopic binary with an orbital period of 3.854 days, an eccentricity of 0.04, and a combined visual magnitude of 5.30. At an angular separation of 3.28 arcseconds is a magnitude 8.46 A-type main sequence star with a classification of A0 Vp. Finally, a fourth member of the system is a magnitude 11.0 F-type main sequ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the Northern celestial hemisphere between Pisces (constellation), Pisces to the west and Taurus (constellation), Taurus to the east. The name Aries is Latin for sheep, ram. Its traditional astrological symbol is (♈︎). It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation ranking 39th in overall size, with an area of 441 square degrees (1.1% of the celestial sphere). Aries has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Angular Separation
Angular distance or angular separation is the measure of the angle between the orientation of two straight lines, rays, or vectors in three-dimensional space, or the central angle subtended by the radii through two points on a sphere. When the rays are lines of sight from an observer to two points in space, it is known as the apparent distance or apparent separation. Angular distance appears in mathematics (in particular geometry and trigonometry) and all natural sciences (e.g., kinematics, astronomy, and geophysics). In the classical mechanics of rotating objects, it appears alongside angular velocity, angular acceleration, angular momentum, moment of inertia and torque. Use The term ''angular distance'' (or ''separation'') is technically synonymous with ''angle'' itself, but is meant to suggest the linear distance between objects (for instance, a pair of stars observed from Earth). Measurement Since the angular distance (or separation) is conceptually identical to an ang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sigma Arietis
Sigma Arietis is a star in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from σ Arietis, and abbreviated Sigma Ari or σ Ari. This star has an apparent visual magnitude of +5.52, which is bright enough for the star to be seen with the naked eye from dark suburban skies. The star is located at a distance of approximately from the Sun based on parallax measurements, and is drifting further away with a radial velocity of +17 km/s. On November 20, 1952, it was observed being occulted by the planet Jupiter. Sigma Arietis is a B-type main sequence star with a stellar classification of B7 V. This is a large star with three times the radius of the Sun and 3.8 times the Sun's mass. It shines around 301 times as brightly as the Sun, with this energy being radiated into space from its outer atmosphere at an effective temperature of 13,121 K. It is this heat that gives the star the blue-white hue of a B-type star. Sigma Arie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omicron Arietis
Omicron Arietis is a single, blue-white-hued star in the northern constellation of Aries. Its name is a Bayer designation that is Latinised from ο Arietis, and abbreviated Omicron Ari or ο Ari. This star has an apparent visual magnitude of +5.78, which means it is dimly visible to the naked eye. Based upon an annual parallax shift of as seen from Earth, it is located approximately 560 light-years from the Sun. At that distance, the visual magnitude of the star is diminished by an extinction factor of 0.22 due to interstellar dust. This is a B-type main-sequence star with a stellar classification of B9 Vn. The 'n' suffix indicates that it has nebulous absorption lines in its spectrum, which are caused by the Doppler effect and rapid rotation. Indeed, it has a projected rotational velocity of 225 km/s. The star has an estimated 2.8 times the mass of the Sun and about 4.3 times the Sun's radius. It is radiating energy from its photosphere at 217 times the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mu Arietis
Mu Arietis is a multiple star system in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from μ Arietis, and abbreviated Mu Ari or μ Ari. This system is approximately distant from Earth Earth is the third planet from the Sun and the only astronomical object known to Planetary habitability, harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all ..., give or take a 8 light-year margin of error, and has a combined apparent visual magnitude of 5.74. According to the Bortle Dark-Sky Scale, this means it is faintly visible to the naked eye from dark suburban skies. The system is positioned near the ecliptic and is subject to lunar occultation. At the heart of this system is a close orbiting pair, designated μ Ari Aa, consisting of a magnitude 6.38 A-type main sequence star with a stellar classification of A0 Vp, and a magnitude ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nu Arietis
Nu Arietis is a white-hued star in the northern constellation of Aries. Its name is a Bayer designation that is Latinized from ν Arietis, and abbreviated Nu Ari or ν Ari. This star is faintly visible to the naked eye with an apparent visual magnitude of +5.43. Based upon an annual parallax shift of as seen from Earth, it is located approximately 270 light years from the Sun. It is moving further away with a radial velocity of 8 km/s. This is an A-type main sequence star with a stellar classification of A7 V. Nu Arietis has an estimated 1.9 times the mass of the Sun and about 3.3 times the Sun's radius. The star is radiating 37.6 times the Sun's luminosity from its photosphere at an effective temperature of around 7,889 K. It is roughly 621 million years old and is spinning with a projected rotational velocity Stellar rotation is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bond (Chinese Constellation)
''Leu'' (or ''Low'') ''sieu'' () meaning "the Train of a garment", is one of the Twenty-eight mansions, twenty-eight lunar mansions of traditional Chinese astronomy. It is one of the mansions of the White Tiger (Chinese constellation), White Tiger of the West (西方白虎). The asterisms in the Region of ''Leu'' （婁宿天區） Notes See also * Traditional Chinese star names References * * 大崎正次 (1987). 『中国の星座の歴史』 雄山閣出版. External links * 陳冠中, 陳輝「中國古代的星象系統 (71)： 婁宿天區」 - 天文教育資訊網 (AEEA) {{Chinese constellation Chinese constellations ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
