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Topic: 70 Ophiuchi

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36 Ophiuchi

Qing Dynasty

	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".
		70 Ophiuchi is another close binary with a period of 88.3 years.
		Kappa Ophiuchi is an irregular (Lb) variable that fluctuates betweem 4.1 and 5.0.
	www.dibonsmith.com /oph_con.htm (1193 words)

	70 Ophiuchi (Site not responding. Last check: 2007-10-14)
		Contrast effects make the two quite the colorful pair, nineteenth-century Admiral Smythe calling them "pale topaz and violet." The primary (70 Oph A) is a class K0 star with a magnitude of 4.22, A temperature of 5290 Kelvin, a luminosity 0.51 that of the Sun, and a radius of 0.85 solar.
		The respective parameters for the fainter secondary star (70 Oph B) are magnitude 6.01, 4250 Kelvin, 0.16 solar luminosities, and 0.70 solar radii.
		The binary orbit: 70 Ophiuchi B is seen in elliptical orbit about 70 Ophiuchi A (though in reality, each orbits a common center of mass).
	www.astro.uiuc.edu /projects/sow/70oph.html (488 words)

	Encyclopedia: List of nearest bright stars (Site not responding. Last check: 2007-10-14)
		70 Ophiuchi is a binary star system 16.
		Altair Altair (α Aql / α Aquilae / Alpha Aquilae / Atair) is the brightest star in the constellation Aquila and the twelfth brightest star in the nighttime sky, at visual magnitude 0.
		70 Virginis (also designated HD 217014 and SAO 090896, HR 5072) is a main sequence star in the constellation Virgo.
	www.nationmaster.com /encyclopedia/List-of-nearest-bright-stars (2011 words)

	Prairie Astronomy Club: Double Stars To Follow - Part I by Martin Gaskell
		70 Ophiuchi is the (eastern) left-most star of a triangle of 4th magnitude stars a few degrees to the east (left) of Beta and Gamma Ophiuchi below Hercules.
		70 Ophiuchi is one of the most interesting binaries in the sky for an amateur sized telescope for several reasons: both components are fairly bright, it has a large separation and it appears to move rapidly.
		70 Ophiuchi A is a little less than half the luminosity of the Sun and 70 Ophiuchi B is less than 1/10 of the luminosity of the Sun.
	www.prairieastronomyclub.org /dblstar1.htm (1045 words)

	Encyclopedia: Ophiuchus (Site not responding. Last check: 2007-10-14)
		The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object.
		RS Ophiuchi, a star too faint to interest amateur skywatchers, is part of a strange class called recurrent novas, whose brightness increases at irregular intervals by hundreds of times in a period of just a few days.
		RS Ophiuchi is a recurring nova in Ophiuchi.
	www.nationmaster.com /encyclopedia/Ophiuchus (4560 words)

	Ofiúco (Site not responding. Last check: 2007-10-14)
		Eta Ophiuchi é um pequeno binário com uma órbita de 88 anos: 2.9, 3.4.
		Lambda Ophiuchi é também um binário rápido: 4.2, 5.2.
		70 Ophiuchi é outro pequeno binário com um período de 88.3 anos: 4.2, 6.0.
	www.ga-esec-pinheiro-rosa.rcts.pt /constelacoes_antiga/ofiuco.htm (1050 words)

	* Alpha Ophiuchi - (Astronomy): Definition
		Rasalhague = Alpha Ophiuchi Cebalrai = Beta Ophiuchi Yed Prior = Delta Ophiuchi Yed Posterior = Epsilon Zeta Oph = Zeta Ophiuchi Sabik = Eta Ophiuchi Theta Oph = Theta Ophiuchi Rho Oph = Rho Ophiuchi 70 Oph = 70 Ophiuchi &...
		The brightest star in Ophiuchus is second-magnitude Alpha Ophiuchi, called Rasalhague from the Arabic meaning ‘the head of...
		Rasalhague is a relatively bright star with a magnitude of 2.
	en.mimi.hu /astronomy/alpha_ophiuchi.html (116 words)

	Imago Mundi - Ophiuchus.
		Rhô Ophiuchi, au sud-ouest de la constellation, est une étoile quadruple située à 410 années-lumière.
		Khi Ophiuchi, à la frontière avec le Scorpion, est une variable irrégulière de type spectral B, dont la magnitude évolue entre 4,20 et 5,0.
		Y Ophiuchi est une Céphéide (c'est-à-dire appartenant à la famille de Delta de Céphée), dont la magnitude oscille entre 5,90 et 6,40 au cours d'une période de 17 jours 3 heures.
	www.cosmovisions.com /oph.htm (1478 words)

	70 Ophiuchi 2?
		Some useful star catalogue numbers include: 70 Oph, HR 6752, Gl 702 A, Hip 88601, HD 165341, SAO 123107, LHS 458, ADS 11046 A, and Struve 2272 A. Stars A and B have a relatively wide separation.
		A main sequence orange-red dwarf (K5-6 Ve), star B has only about 70 percent of Sol's mass (RECONS), about 73 percent of its diameter (Johnson and Wright, 1983, page 691), and 8.4 to nine percent of its visual luminosity (16 percent with infrared adjustment).
		However, those and subsequent observers failed to agree on the orbital period or amplitude of the perturbation, or even on which of the two stars was disturbed in its motion.
	www.solstation.com /stars/70ophiu2.htm (798 words)

	70 Ophiuchi AB System Orbits
		Center of H.Z. This animation attempts to relate the orbits (and possible habitable zones) of Stars A and B in the 70 Ophiuchi AB system to their common center of mass.
		Based on new measurements (Dimitri Pourbaix, 2000) found in the new Sixth Catalog of Visual Orbits of Binary Stars, 70 Ophiuchi A and B may be separated on average by a semi-major axis of 23.2 AUs (4.554") in a highly elliptical orbit (e= 0.499) that takes 83.38 years to complete.
		The distance separating the two stars varies from 11.4 and 34.8 AUs; they are always separated from each other by roughly the orbital distance of Saturn in the Solar System.
	www.solstation.com /orbits/70ophsys.htm (257 words)

	[No title] (Site not responding. Last check: 2007-10-14)
		During the survey boom, ethnic groups, religious groups, and nearly any other sort of affiliation capable of gathering the resources made plans for an Exodus to one of the offworld colonies, to find an isolated homeland and live life as it was meant to be, without interferance.
		They sat their survey instruments in V1054 Ophiuchi to open the link to 70 Ophiuchi, getting year's head start on the UN survey...until V1054 Ophiuchi flared, and they lost their automated data.
		The UN's larger telescopes showed a Jovian-mass planet with a highly eccentric orbit that went through the biozone of 70 Ophiuchi, and the UN withdrew its instruments as the boom collapsed.
	www.adastragames.com /universe/gault_main.html (394 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)

	articles: Varley, John - The Ophiuchi Hotline (1977)
		그리고 그 영향력은 70년대 초까지 제한적이나마 상당히 강하게 남아 있었다.
		70년대 SF의 발전에 기여한 세 번째 요인이야말로 바로 이 '아직 무너지지 않은 전통의 힘'이었다.
		이러한 편안한 신선함은 특히 70년대 후반으로 접어들면서 매우 중요한 작용을 할 수 있었다.
	www.inkeehong.com /articles/2_fantastic/632_varley_john_the_ophiuchi_hotline_1977.html (1504 words)

	[No title]
		This week's problem is all about the orbit of the double star 70 Ophiuchi.
		Create a plot of the observed orbit of 70 Oph, using data from all three sources.
		Calculate the total mass of the 70 Oph system in terms of the solar mass.
	spiff.rit.edu /classes/phys440/homework/homework.4.html (474 words)

	The Reflector, May 20001: The Dioscuri
		Eta Ophiuchi, Zeta, and Beta follow at 2.6, 2.7 and 2.9 magnitude.
		A number of double stars are here, too, including Sabik (Eta Ophiuchi), a pair of third-magnitude stars separated by one second.
		70 Ophiuchi is another interesting multiple star; the colors are said to be yellow and purple.
	www.eastbayastro.org /2001/0601/r0601-2.htm (747 words)

	70 Ophiuchi (Site not responding. Last check: 2007-10-14)
		70 Oph hat zwar eine Umlaufzeit von etwa 88 Jahren, ist aber nur 17 Lichtjahre von uns entfernt.
		Ich beobachte 70 Oph schon seit mehr als 20 Jahren: in dieser Zeit war die zunehmende Distanz auffallend und auch die Änderung des Positionswinkels.
		Bahndiagramm von 70 Oph von der Webseite von Richard Dibon-Smith.
	members.eunet.at /vollmann/70_oph.htm (1076 words)

	Lt Cliff Highball (Site not responding. Last check: 2007-10-14)
		Later, Highball volunteered to join an aid organisation operating in 70 Ophiuchi, during which he was caught up in the Resource Wars.
		His time in 70 Ophiuchi has also provided him with some military skills (marksmanship especially).
		Previous superiors hold some reservations about Highball's attitude, which is described as troublesome but not threatening, though this is typically overlooked due to his exemplary talents.
	members.iinet.net.au /~nichevo/rpg/archives/alternity_vae_victis/npc/sidekick_highball.shtml (126 words)

	Messier Object 14
		In 1938, a nova appeared in M14, which however was not discovered before 1964, when Amelia Wehlau of the University of Western Ontario surveyed a collection of photographic plates taken by Helen Sawyer Hogg between 1932 and 1963 (Hogg and Wehlau, 1964).
		Beta or 60 Ophiuchi, called Cheleb (or Cebalrai, or Kelb Altai) is an orange giant of spectral type K1 III or K2 III and mag 2.9, at a distance of about 125 ly.
		Eta or 35 Ophiuchi (Sabik) is a binary of two A2 stars, mag 3.2 and mag 3.5, with an orbital period of about 85 years, separated about 0.4"-0.6", at about 70 ly distance.
	www.obspm.fr /messier/m/m014.html (938 words)

	CloudyNight's forums: Three easy Colorful Double Stars
		Izar and Rasalgethi are very colorful where the colors in #70 Oph are more suttle.
		70 Ophiuchi Observed at 2:05 U.T. on 8/22/2004 during IV seeing with my ETX-90RA at 100X.
		I observed it the same night as 70 Ophiuchi at the same magnification.
	www.cloudynights.com /ubbthreads/showflat.php/Cat/1,2,3,4,5,8,9,10/Number/180354/page/5/view/collapsed/sb/8/o/all/fpart/1 (329 words)

	Poniatowski's Bull (Site not responding. Last check: 2007-10-14)
		The vee-shaped set of stars pointing downward at the center of the picture, reminiscent of a bull's head and horns and set in northeastern Ophiuchus, is the defunct constellation -- now an asterism -- Poniatowski's Bull (Taurus Poniatovii), which honors Stanislaus Poniatowski, King of Poland from 1764 to 1795.
		The middle star of the left horn is the orbiting binary 70 Ophiuchi.
		The bright star to the far right is Rasalhague (Alpha Ophiuchi); Cebalrai (Beta Oph) is down and to the left of it.
	www.astro.uiuc.edu /projects/sow/pon-p.html (136 words)

	Weasner's Meade ETX Site
		Varying from magnitude 6 to 9 at a period of just less than one year (334 days), X Ophiuchi really is a great "beginning" variable star and is ideal for the ETX 60 and 70 with their wide fields of view.
		At magnitude 7.0, this is one of the brightest globulars and presents a wider "scattering" of stars.
		In the ETX 60 and 70 and all scopes with very low power and wide fields, this provides one of the most striking of all celestial sights, in a very, very rich star field of the fringes of the Milky Way.
	www.weasner.com /etx/ref_guides/ophiuchus.html (3940 words)

	Measurements of the 70 Ophiuchi binary star system - AA Institute of Space Science & Technology (Site not responding. Last check: 2007-10-14)
		Calculating the linear distance between the two suns in the 70 Ophiuchi system from observed separation and given distance of 16.6 light years [Image: Abdul Ahad]
		NOTE: Just a few words of caution - the above method is only valid if the orbital ellipse is sufficiently widely presented to the observer (as is the case with 70 Ophiuchi), where the two stars are near equi-distant from Earth.
		In all other cases, a full 3D analytical solution will be required which will take account of the binary system's orbit orientation in space relative to the observer.
	www.freewebs.com /aa_spaceagent1/70oph-linear.html (128 words)

	Light cone
		HR511 is 32.5 light years away and only 5 months from the outer surface of your light cone - your ever-growing sphere of potential causality - which began its expansion from Earth on June 29 1973.
		12 Ophiuchi is 31.9 light years from Earth.
		It was enveloped by your light cone 3 months ago.
	www.interconnected.org /home/more/lightcone/rss/?d=1973-06-29 (150 words)

	The Ophiuchi Hotline Summary & Study Guide by John Varley
		I n the late twentieth century, humanity was evicted from Earth by the Invaders — an alien race that had evolved in a giant gas planet.
		Lilo is caught studying genetic information that had been transmitted over the Ophiuchi Hotline, and she is sentenced to eternal death; there will be no clone to receive her mind.
		To move forward, the novel emphasizes, is to find a future for the human race; to turn back to the past is to have no future.
	www.bookrags.com /short/ophiuchi_hotline (565 words)

	Prairie Astronomy Club: Double Stars to Follow - Part IV by Martin Gaskell
		I've given stars for the winter (Castor), spring (Gamma Virginis and Xi Ursa Majoris), and summer (70 Ophiuchi).
		Although the motion is not as spectacular as 70 Ophiuchi's, with cardboard micrometer measurements it should be possible to detect motion of Zeta Aquarii even during a single observing season.
		The magnitude difference is similar to the one in 70 Ophiuchi, but the stars appear closer at the moment.
	www.prairieastronomyclub.org /dblstar4.htm (1473 words)

	The 1991 Southern Hemisphere Complex os Activity (Site not responding. Last check: 2007-10-14)
		Abstract - Calibration of nearby visual binary stars on the HR diagram is used to determine the helium abundance, age and mixing length parameter for stars other than the Sun.
		Complementing these results by those for the Sun and it is shown that in the framework of the mixing length formalism to describe convection, a unique value of the mixing length parameter, equal to the solar one can be used to model these objects.
		Except for 85 Pegasi system, which cannot be explained by means of standard stellar evolutionary models, the helium abundance is determined with a precision of 0.02 (abundance in mass) and the age with a precision of 2 Gyr.
	www.mat.uc.pt /~obsv/obsv/artigo2.html (202 words)

	Arrakis - Dune
		a plant native to Sikun (of 70 Ophiuchi A) characterized by almost oblong leaves.
		Its green and white stripes indicate the constant multiple condition of parallel active and dormant chlorophyll regions.
		the planet of Ophiuchi B (36), homeworld of House Harkonnen.
	www.dunemessiah.com /terms.shtml (5134 words)

	Observing the Sky » A fainter “Beehive”
		With the last chances to see M-44 in dark sky gone for the season, look up 45 degrees in the south-southwest shortly after 4:00am, CDT to see another open cluster of stars resembling the winter “Beehive.” Just one degree above Beta Ophiuchi is the open cluster IC 4665.
		Furthermore, put the open cluster at the edge of the 7x binocular field in the 2 o’clock position.
		At the opposite edge of the field in the 9 o’clock position is the star 70 Ophiuchi.
	www.observingthesky.org /index.php?p=510 (223 words)

	ASSA - Monthly Newsletter
		Jenni tells how she tracked down the truth and provides an answer to this mystery once and for all.
		In this "Star of the Month" article, Steven writes about a past controversy and speculates about the true nature of 70 Ophiuchi -- a binary star system located a mere 16.5 light years away.
		Fraser discusses a set of simple equations that are used to analyse light curves originating from binary star systems.
	www.assa.org.au /bulletin (472 words)

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