What is the area of the constellation of which Epsilon Arietis is a part?
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Epsilon Arietis Epsilon Arietis (ε Ari, ε Arietis) is the Bayer designation for a visual binary star system in the northern constellation of Aries. It has a combined apparent visual magnitude of 4.63 and can be seen with the naked eye, although the two components are too close together to be resolved without a telescope. With an annual parallax shift of 9.81 mas, the distance to this system can be estimated as 330 ly , give or take a 30 light-year margin of error.
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Aries (constellation) Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is (Unicode ♈), representing a ram's horns. 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 overall size, with an area of 441 square degrees (1.1% of the celestial sphere).
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Alnilam Alnilam, designated Epsilon Orionis (ε Orionis, abbreviated Epsilon Ori, ε Ori) and 46 Orionis (46 Ori), is a large blue supergiant star some 2,000 light-years distant in the constellation of Orion. It is estimated to be 275,000 to 537,000 times as luminous as the Sun, and around 34 times as massive.
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Epsilon Reticuli Epsilon Reticuli (Epsilon Ret, ε Reticuli, ε Ret) is a double star approximately 59 light-years away in the constellation of Reticulum. The primary component is an orange subgiant, while the secondary is a white dwarf. The two stars share a common motion through space and hence most likely form a binary star system. The brighter star should be easily visible without optical aid under dark skies in the southern hemisphere. In 2000, an extrasolar planet was confirmed to be orbiting the primary star in the system.
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Leo Supercluster The Leo Supercluster is a supercluster in the Northern Celestial Hemisphere that stretches across the constellations Ursa Major and Leo. It covers an area approximately 130 megaparsecs long by 60 megaparsecs wide. The redshifts of member galaxy clusters range from 0.032 to 0.043. The brightest cluster in the system is Abell 1185.
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Serpens in Chinese astronomy The modern constellation Serpens lies across one of the quadrants, symbolized by the Azure Dragon of the East (東方青龍, "Dōng Fāng Qīng Lóng"), and Three Enclosures (三垣, "Sān Yuán"), that divide the sky in traditional Chinese uranography.
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Nu Piscium Nu Piscium (ν Piscium) is an orange-hued binary star system in the zodiac constellation of Pisces. Prior to the formation of the modern constellation boundaries in 1930, it was designated 51 Ceti in the Cetus constellation. Nu Piscium is visible to the naked eye, having a combined apparent visual magnitude of 4.44. Based upon an annual parallax shift of 8.98 mas as seen from Earth, it is located about 363 light years from the Sun.
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S Arae S Arae (S Ara) is an A-type star in the constellation of Ara. It has an apparent visual magnitude which varies between 9.92 and 11.24.
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Centaurus Centaurus is a bright constellation in the southern sky. One of the largest constellations, Centaurus was included among the 48 constellations listed by the 2nd-century astronomer Ptolemy, and it remains one of the 88 modern constellations. In Greek mythology, Centaurus represents a centaur; a creature that is half human, half horse (another constellation named after a centaur is one from the zodiac: Sagittarius). Notable stars include Alpha Centauri, the nearest star system to the Solar System, its neighbour in the sky Beta Centauri, and V766 Centauri, one of the largest stars yet discovered. The constellation also contains Omega Centauri, the brightest globular cluster as visible from Earth and one of the largest known.
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Tau Eridani Tau Eridani (τ Eri, τ Eridani) is a group of fairly widely scattered stars in the constellation Eridanus.
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Rho2 Arietis Rho Arietis is the Bayer designation for a M-type red giant star in the northern constellation of Aries. With an annual parallax shift of 9.28 mas, it is approximately 350 ly distant from the Earth. It is classified as a semiregular variable star with periods of 49.9 and 54.8 days, while varying in visual magnitude between 5.62 and 6.01. This star is also known by its variable star designation, RZ Arietis.
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Perseus (constellation) Perseus is a constellation in the northern sky, being named after the Greek mythological hero Perseus. It is one of the 48 listed by the 2nd-century astronomer Ptolemy, and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located near several other constellations named after ancient Greek legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west. Some star atlases during the early 19th century also depicted Perseus holding onto the head of the Medusa, whose asterism was named together as "Perseus et Caput Medusae", however, this never came into popular usage.
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Theta Eridani Theta Eridani (θ Eridani, abbreviated Theta Eri, θ Eri) is a binary system in the constellation of Eridanus. Its two components are designated θ¹ Eridani, also named Acamar, and θ² Eridani. The system's distance from the Sun as measured by the Hipparcos astrometry satellite is approximately 120 light-years.
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Omicron Draconis Omicron Draconis (ο Dra, ο Draconis) is a giant star in the constellation Draco located 322.93 light years from the Earth. It has a radius of 30 solar radii, and a luminosity of 269 suns. Its path in the night sky is circumpolar above the ecliptic, meaning the star never rises or sets when viewed in the night sky from certain positions in the northern hemisphere.
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Theta Andromedae Theta Andromedae (θ And, θ Andromedae) is the Bayer designation for a binary star in the constellation Andromeda. It is approximately 310 ly from Earth, with a visual magnitude of 4.6. On the Bortle Dark-Sky Scale, this makes it visible to the naked eye from outside urban regions.
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Omega2 Aquilae Omega Aquilae, Latinized from ω Aquilae, is the Bayer designation for a star in the equatorial constellation of Aquila, the eagle. It has an apparent visual magnitude of 6.0, which is close to the lower limit of detectability with the naked eye. According to the Bortle Dark-Sky Scale, this star can be viewed from dark rural skies. As the Earth orbits about the Sun, this star undergoes a parallax shift of 12.27 mas. This is equivalent to a physical distance of 270 ly from Earth, give or take a 10 light year margin of error.
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Epsilon Arae The Bayer designation Epsilon Arae (ε Ara / ε Arae) is shared by two star systems, in the constellation Ara:
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Boötes in Chinese astronomy The modern constellation Boötes lies across one of the quadrants symbolized by the The Azure Dragon of the East (東方青龍, "Dōng Fāng Qīng Lóng"), and Three Enclosures (三垣, "Sān Yuán"), that divide the sky in traditional Chinese uranography.
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Epsilon Monocerotis ε Monocerotis, Latinised as Epsilon Monocerotis, is the Bayer designation of a binary star in the constellation Monoceros.
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Zeta Chamaeleontis Zeta Chamaeleontis (ζ Cha), is a star located in the constellation Chamaeleon. Zeta Chamaeleontis is also known as HR 3860, and HD 83979. Located around 570 light-years distant, it shines with a luminosity approximately 522 times that of the Sun and has a surface temperature of 13544 K. South African Astronomer A.W.J. Cousins noted it to vary between magnitudes 5.06 and 5.17 in 1960. It was classified as a Beta Cephei variable in the Hipparcos and Tycho Catalogues (ESA 1997), with a period of 1.07 days, before being reclassified as a Slowly pulsating B star in the 2011 version.
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Iota1 Muscae ι Muscae, Latinised as Iota Muscae, is a solitary star in the constellation Musca. Its apparent magnitude is 5.04. Located around 67.80 pc distant, it is an orange giant of spectral type K0III, a star that has used up its core hydrogen and is cooling and expanding. The measured angular diameter is . At the estimated distance of the star, this yields a physical size of about 11 times the radius of the Sun.
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Epsilon Pegasi Epsilon Pegasi (ε Pegasi, abbreviated Epsilon Peg, ε Peg), also named Enif (EE-nif), is the brightest star in the northern constellation of Pegasus. With an apparent visual magnitude of 2.4, this is a second-magnitude star that is readily visible to the naked eye. The distance to this star can be estimated using parallax measurements from the Hipparcos astrometry satellite, yielding a value of around 690 ly .