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Topic: Alpha Ophiuchi

	Astronomy Unbound
		Alpha Aquilae is the 12th brightest star in the sky, which is 0.8 in magnitude.
		Alpha Aurigae is the 6th brightest star in the sky with a magnitude of 0.1.
		It is the brightest cluster in the northern hemisphere.
	library.thinkquest.org /C006574/constel.html (5266 words)

	No Title
		Alpha Ophiuchi is close to Vega on the night sky, but is markedly fainter.
		Ophiuchi has m=2.08, so it is almost exactly 2 magnitudes fainter, or a factor of 6.3 in brightness.
		Ophiuchi is a factor of 6.3 fainter than Vega, although of the same intrinsic brightness.
	www-astro.physics.uiowa.edu /~srs/Locus8_02/Locus8_02.html (571 words)

	Les étoiles les plus brillantes (Site not responding. Last check: 2007-10-18)
		Alpha Canis Majoris Sirius 06 45 -16.7 227.2 -8.9 A1V -1.44 1.45 379.21 1.58 9 2.
		Alpha Scorpii Antares 16 29 -26.4 351.9 +15.1 M1Ib+B4V 1.06 -5.28 5.40 1.68 600 17.
		Zeta Ophiuchi Han 16 37 -10.6 6.2 +23.6 O9.5V 2.54 -3.20 7.12 0.71 460 95.
	atunivers.free.fr /stars.html (4639 words)

	Najjaśniejsze Gwiazdy
		Alpha Scorpii Antares 16 29 -26.4 351.9 +15.1 M1Ib+B4V 1.06 -5.28 5.40 1.68 600 17.
		Alpha Coronae Borealis Alphecca 15 35 +26.7 41.9 +53.7 A0V+G5V 2.22 0.42 43.65 0.79 75 68.
		Nu Ophiuchi 17 59 -09.8 18.2 +7.0 K0III 3.32 -0.03 21.35 0.79 155 241.
	www.wszechswiat.astrowww.pl /stars.html (4595 words)

	* Alpha Ophiuchi - (Astronomy): Definition
		The brightest star, alpha Ophiuchi, is better known as Rasalhague, meaning "Head of the Snake Charmer".
		This is a rather close star, at 54 light years away, and a celestial neighbour of Ras Algethi (alpha Herculis), which lies to the WNW five degrees.
		The brightest star in Ophiuchus is second-magnitude Alpha Ophiuchi, called Rasalhague from the Arabic meaning ‘the head of the serpent collector'.
	en.mimi.hu /astronomy/alpha_ophiuchi.html (127 words)

	Constellations: Ophiuchus, The Serpent Holder
		Principal stars are: Rasalhague Alpha Ophiuchi, magnitude 2.6; Cebalrai Beta Ophiuchi, magnitude 2.8; Yed Prior Delta.
		Ophiuchi, magnitude 2.7 and Gamma Ophiuchi, magnitude 3.8.
		There is also a recurring nova, RS Ophiuchi, which flares up every 20 years or so.
	www.r-clarke.org.uk /constellations/ophiuchus.htm (312 words)

	Auckland Astronomical Society
		It is visible to the naked eye under dark skies as a pipe bowl and stem, extending around seven degrees in length.
		Alpha Ophiuchi, also named Rasalhague is a magnitude 2.1 A-type giant star around 47 light years distant.
		NGC 6572 is a tiny, bright bluish planetary nebula 4.7° northeast of 70 Ophiuchi.
	www.astronomy.org.nz /aas/Journal/Ophiuchus.asp (1220 words)

	Najjaśniejsze Gwiazdy
		Alpha Canis Majoris Syriusz 06 45 -16.7 227.2 -8.9 A1V -1.44 1.45 379.21 1.58 9 2.
		Alpha Canis Minoris Procjon 07 39 +5.2 213.7 +13.0 F5IV-V 0.40 2.68 285.93 0.88 11 9.
		Alpha Crucis Acrux 12 27 -63.1 300.2 -0.4 B0.5IV+B1V 0.77 -4.19 10.17 0.67 320 14.
	wszechswiat.astrowww.pl /stars.html (4595 words)

	The Brightest Stars
		Alpha Canis Majoris Sirius 06 45 -16.7 227.2 -8.9 A1V -1.46 1.43 379.21 1.58 9 2.
		Alpha Orionis Betelgeuse 05 55 +7.4 199.8 -9.0 M2Ib 0.55v -5.04v 7.63 1.64 430 11.
		Alpha Tauri Aldebaran 04 36 +16.5 181.0 -20.2 K5III 0.86v -0.64v 50.09 0.95 65 15.
	www.atlasoftheuniverse.com /stars.html (4673 words)

	Ophiuchus
		Eta Ophiuchi is a close visual with an orbit of 88 years: 2.9, 3.4; presently the companion is at PA 247º and separation 0.6".
		X Ophiuchi is a long-period variable, 5.9-9.2 with a period of 328.85 days.
		M19 is seven degrees due east of Antares (alpha Sco), or two and a half degrees west of the bright double 36 Ophiuchi (and very slightly north, less than a degree).
	www.dibonsmith.com /oph_con.htm (1193 words)

	Hércules (Site not responding. Last check: 2007-10-18)
		Agora olhe a Sudeste e encontrará alpha Ophiuchi (Ras Alhague), com magnitude de 2.1, a estrela mais brilhante da região.
		Alpha Herculis é mais conhecida como Ras Algethi: A cabeça da pessoa que se ajoelha.
		Alpha Herculis é uma variável irregular que varia entre 2.7 e 4.0, com um período de cerca de 3 meses.
	www.ga-esec-pinheiro-rosa.rcts.pt /constelacoes_antiga/hercules.htm (803 words)

	Najjaśniejsze Gwiazdy (Site not responding. Last check: 2007-10-18)
		Alpha Lyrae Wega 18 37 +38.8 67.5 +19.2 A0V 0.03 0.58 128.93 0.55 25 6.
		Alpha Coronae Borealis Alphecca 15 35 +26.7 41.9 +53.7 A0V+G5V 2.22 0.42 43.65 0.79 75 68.
		Alpha Canum Venaticorum Cor Caroli 12 56 +38.3 118.3 +78.8 A0IV+F0V 2.80 0.16 29.60 1.04 110 131.
	www.atlas-wszechswiata.pl /stars.html (4595 words)

	Constellations and Featured Stars
		Although designated as “Alpha Orionis”, supposedly the brightest star in the constellation of Orion, it is actually outshone by Rigel (Beta Orionis).
		The other famous example of this incorrect labelling is Alpha Geminorum and Beta Geminorum, Castor and Pollux, although it is thought that Castor has dimmed substantially over the years.
		Cassiopeia, the wife of King Cepheus, ruler of Ethiopia, was beautiful, arrogant and vain, and it was these latter two characteristics which were to lead to her downfall.
	www.donastro.freeserve.co.uk /constellations.htm (3191 words)

	Ofiúco (Site not responding. Last check: 2007-10-18)
		Lambda Ophiuchi é também um binário rápido: 4.2, 5.2.
		Tau Ophiuchi: 5.2, 5.9, com uma órbita de 280 anos.
		X Ophiuchi é uma variável de longo período, 5.9-9.2 em cada 328.85 dias.
	www.ga-esec-pinheiro-rosa.rcts.pt /constelacoes_antiga/ofiuco.htm (1050 words)

	Hercules (Site not responding. Last check: 2007-10-18)
		Alpha Herculis is better known as Ras Algethi: The kneeler's head.
		Alpha Herculis is a visual binary with a very long period, something like 3600 years.
		Alpha Herculis is an irregular variable with a range from 2.7 to 4.0, with a period of roughly three months.
	www.troop54.com /resources/constellations/Hercules.htm (829 words)

	Domicilium Deorum
		[alpha] Scorpii, commonly known as Antares, is the red star close to lower right of the photo.
		[alpha] Aurigae, commonly known as Capella, is the brightest star on the photo, close to the left edge.
		On the right [alpha] and [beta] Geminorum, commonly known as Castor and Pollux, are the two bright stars at the bottom of a group of stars.
	www.astro.utu.fi /~rareko/Olympos/Places/Astro/NightSky.html (556 words)

	APOD: 2006 July 14 - The Colorful Clouds of Rho Ophiuchi (Site not responding. Last check: 2007-10-18)
		Near the top, Rho Ophiuchi and nearby stars are immersed in blue reflection nebulae - dust clouds that shine primarily by reflected starlight.
		Characteristic of star forming regions, the telltale red emission from hydrogen gas also permeates the view along with dark, obscuring dust clouds seen in silhouette against the background stars and brighter nebulosities.
		About 500 light-years away, the Rho Ophiuchi star clouds, are well in front of the nearby globular star cluster M4, visible just below and right of center.
	antwrp.gsfc.nasa.gov /apod/ap060714.html (175 words)

	Ophiucus - Memory Alpha, the Star Trek Wiki (Site not responding. Last check: 2007-10-18)
		From Memory Alpha, the free Star Trek reference.
		Since the colony on Ophiucus III seems to be a Human settlement, the following is a list of the nearest stars from Sol in Ophiuchus, one of which the planet might orbit:
		The Star Trek Star Charts suggest 36 Ophiuchi to be the location of the Ophiucus system, of which the primary and secondary stars are an orange main sequence dwarf of spectral class K1 and the tertiary star of spectral class K5.
	memory-alpha.org /en/wiki/Ophiucus_system (161 words)

	AstronomyNZ - Star Charts
		Antares (Alpha Scorpii) is a red supergiant (M1.5 Iab) with a diameter 400 times that of the Sun.
		Rasalhague (Alpha Ophiuchi) is a white star (A5 V), 44 times brighter than the Sun.
		Vega (Alpha Lyrae) is a blue-white star (A0 V), the 5th brightest star in the entire sky.
	www.astronomynz.org.nz /nightsky/star_charts/star_charts.htm (1298 words)

	(meteorobs) May 13 Observations (Site not responding. Last check: 2007-10-18)
		A total surprise was the fact that 7 plotted meteors intersected at a radiant located just southeast of Alpha Ophiuchi (265 +11).
		It should be noted that 3 of these meteors also lined up with another radiant and could belong to either one.
		Plots from last week indicate 3 more possible candidates with similar velocities from a radiant west of Alpha Ophiuchi.
	www.meteorobs.org /maillist/msg04589.html (252 words)

	The Ursa Major Moving Cluster, Cr 285
		As it is spread over a volume of 30 light years length and 18 light years width, it covers an enourmous portion of the sky, and probably includes the outlying member Alpha Coronae Borealis, which is 30 degrees off.
		The stars are similar to those found in the Hyades and Praesepe (M44), indicating that this cluster is of roughly the same age (700-800 million years) as the other two.
		It seems that these stars are lost "former" cluster members which have their origin in the Ursa Major cluster, but escaped due to mutual encounters, tidal forces of the Milky Way, or encounters with large interstellar clouds and other clusters.
	www.seds.org /messier/xtra/ngc/uma-cl.html (515 words)

	Constellations (Site not responding. Last check: 2007-10-18)
		Regulus (alpha Leonis), mag 1.4 and Denebola and Zosma
		Polaris (alpha Ursae Minoris), a 2nd magnitude supergiant within 1° of the north celestial pole
		Canopus (alpha Carinae), a white supergiant, Miaplacidus (beta Carinae), and epsilon Carinae, an orange giant star
	www.star-names.freeserve.co.uk /constellations.htm (1370 words)

	Ophiuchus information - Search.com
		Ophiuchus is depicted as a man supporting a Serpens; the interposition of his body divides the snake into two parts, Serpens Caput and Serpens Cauda, which are nonetheless counted as one constellation.
		The brightest stars in Ophiuchus include α Ophiuchi, called Rasalhague, at the figure's head; and λ Ophiuchi, a triple star, at his elbow.
		RS Ophiuchi is part of a strange class called recurrent novae, whose brightness increases at irregular intervals by hundreds of times in a period of just a few days.
	domainhelp.search.com /reference/Ophiuchus (907 words)

	Virtual Science Center
		His head, the star Ras Algethi (Alpha Herculis), is next to the star Ras Alhague (Alpha Ophiuchi), the head of Ophiuchus, the Serpent Holder, to the south.
		To the west is Corona Borealis, the Northern Crown, and to the east is Lyra, the Lyre, with its very bright star Vega (Alpha Lyrae).
		A third of the way between the northwest corner of the Keystone, Zeta Herculis, and the southwest corner, Eta Herculis, is M13, the Great Globular Cluster in Hercules, hundreds of thousands of stars packed into a ball a few tens of light-years across.
	www.chabotspace.org /vsc/planetarium/thesky/constellationlore/hercules.asp (608 words)

	[No title]
		Alpha Crucis Alpha Crucis (Acrux) B1IV B3IV Some 360 l.y.
		This raises the question of whether the name of the sector should be changed.
		The best candidate so far that I am aware of is Alpha Leonis (Regulus) which is at least in the sector.
	traveller.mu.org /archive/TNE/Solomani-Rim-Stars.txt (632 words)

	Ophiuchus (Site not responding. Last check: 2007-10-18)
		Even though Ophiuchus is not one of the twelve zodiacal constellations, the Sun transits through it during the month of December.
		Besides many double stars (eta, lambda, xi, omicron, tau Ophiuchi), rho Ophiuchi is particularly remarkable: it is a multiple star, constituted by two components of fifth and sixth magnitude, accompanied by two stars of eighth magnitude disposed in V shape.
		This star is six light-years away from us and it is of magnitude 9,5: its movement is so rapid that in about 350 years it scours a degree of arc northwards.
	www.astrofilitrentini.it /mat/costell/oph_e.html (336 words)

	Art Russell's Monthly Messier Star-Hop; August #1
		Starting at the star Theta Ophiuchi, the next star to the north in the constellation is 44 Ophiuchi.
		There appeared to be a main concentration of stars with a less organized patch apparently in the background to the northwest of the nucleus of the cluster.
		M14 is located not quite 2/3 along the way from Eta Ophiuchi to Beta Ophiuchi, and just to the east of that line.
	education.gsu.edu /spehar/focus/astronomy/star-hop/Monthly/msh08-1.htm (750 words)

	The Ursa Major Moving Cluster, Cr 285 (Site not responding. Last check: 2007-10-18)
		As it is spread over a volume of 30 light years length and 18 light years width, it covers an enourmous portion of the sky, and probably includes the outlying member Alpha Coronae Borealis, which is 30 degrees off.
		The stars are similar to those found in the Hyades and Praesepe (M44), indicating that this cluster is of roughly the same age (400 million years) as the other two.
		It seems that these stars are lost "former" cluster members which have their origin in the Ursa Major cluster, but escaped due to mutual encounters, tidal forces of the Milky Way, or encounters with large interstellar clouds and other clusters.
	astronomy.nju.edu.cn /astron/messier/uma-cl.html (429 words)

	eSky: Ophiuchus
		Ophiuchus is a large constellation (the eleventh largest in the sky), and contains a number of bright stars.
		The star designated Alpha Ophiuchi is Ras Alhague, a fairly nearby star with a name that means 'Head of the Serpent Holder'.
		More famous than any of these is Barnard's Star, which lies just under six light years from Earth, and is one of the Sun's closest neighbours.
	www.glyphweb.com /esky/constellations/ophiuchus.html (371 words)

	Ophiuchus
		Finally, Zeus struck Ophiuchus down with a thunderbolt, but placed him in the sky so that he might be remembered.
		Alpha Ophiuchi, Ras Alhague (17h 35m +12°34') A blue-white giant with a magnitude of 2.1 The star is a class A5 and is 60 light years distant.
		Beta Ophiuchi, Cheleb(17h 43m +04°34') is a yellow giant class K2 star.
	www.starryskies.com /The_sky/constellations/ophiuchus.html (536 words)

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