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Topic: Gamma Virginis

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	Gamma Virginis - Wikipedia, the free encyclopedia
		Porrima, Arich, 29 Virginis, Gl 482 A/B, Gamma Virginis (γ Vir / γ Virginis) is a star in the constellation Virgo.
		Gamma Virginis is a binary star, consisting of two stars of approximately equal apparent magnitudes 3.48 and 3.50, and of spectral type F0V.
		As Gamma Virginis is close to the ecliptic, it can be occulted by the Moon and (extremely rarely) by planets.
	en.wikipedia.org /wiki/Gamma_Virginis (235 words)

	Newsletter- Nehru Centre
		Gamma Virginis consists of two yellow-white, nearly equal stars in brightness: one with 3.6 magnitude and the other with 3.7 magnitude.
		Gamma Virginis is a splendid binary of 3.5 magnitude stars with an orbit of 168.8 years.
		R Virginis is a long-period variable with a range from 6.2 to 12.1 every 145.63 days, exceptionally short for a Mira type variable.
	www.nehrucentremumbai.com /newsletter/June03/zodiac_sign.htm (1132 words)

	Prairie Astronomy Club: Double Stars To Follow - Part III (Martin Gaskell)
		The two components of Gamma Virginis are rushing towards periastron (closest approach) in only ten years time and this provides a rare opportunity to see rapid orbital motion in even the smallest of telescopes.
		Gamma Virginis is the third magnitude star about 15 degrees to the "upper right" of Spica in the direction of Leo.
		Gamma Virginis was one of the first star ever discovered to be double.
	www.prairieastronomyclub.org /dblstar3.htm (1223 words)

	Hanwell Community Observatory \| Double Stars \| Gamma Virginis
		The upshot of all of this is that gamma Virginis is now rocketing apart again, having evidently passed apparent periastron some time in late April or the beginning of May, within 2 or 3 weeks of the date I predicted in early 2004 (and put up here on 8.ii.05, q.v.
		As gamma Virginis returns to the evening sky, may I remind observers that this splendid system is still playing out the climax of its 169-year orbit, to which I drew attention a year ago [1].
		[3] gamma Virginis is, in fact, one of the original six doubles which established the existence of orbiting physical binaries, in the elder Herschel's famous Phil.
	myweb.tiscali.co.uk /hanwellobservatory/gammavirginis.htm (7755 words)

	All About Virgo: June 2006
		Alpha Virginis is known as Spica: the "ear of wheat" that the goddess is carrying.
		Gamma Virginis is a splendid binary of similar 3.5 magnitude stars, with a recently revised orbit of 168.8 years.
		Theta Virginis is a white star with two companions, both rather faint: AB: 4.4, 9.4; PA 343, separation 7.1"; AC: 4.4, 10.4; PA 298º, separation 70".
	allaboutvirgo.blogspot.com /2006_06_01_allaboutvirgo_archive.html (2330 words)

	Highlight - Nov 2006 - Marco Scardia
		Gamma Virginis (Σ 1670 = ADS 8630) is one of the first binary stars discovered in history.
		This was due to the fact that the period of revolution (estimated between 130 and 200 years) was insufficiently known, both because of the large eccentricity of the orbit (e > 0.88) and the fact that the first observed periastron passage in 1836 was poorly followed because of the lack of adequate telescopic power.
		To solve this problem, γ Virginis was regularly observed at the INAF - Osservatorio Astronomico di Brera in Merate between 2004 and 2006.
	www.brera.inaf.it /docM/OAB/High/scardia_nov2006/index.html (773 words)

	Virgo (Site not responding. Last check: 2007-10-10)
		The luminosity of the star is 1,600 suns, its distance is 262 light-years.
		Gamma Virginis - Porrima, total brightness 2.9 mag, is a very pretty double 39 light-years away.
		The extensive cluster of galaxies in Virgo extends as far as beyond the boundaries of the adjacent Berenice's Hair (Coma Berenices).
	www.avastronomyclub.org /const/vir.htm (244 words)

	Virgo: Heavenly Properties
		The sisters Porrima and Postverta attended Carmenta, the Roman Goddess of Prophecy and Writing, who assisted women in labor and was able to foretell the future of the newborn.
		Gamma Virginis, Virgo's second brightest object, has a variable yellow light and shines on the waist of the Virgin.
		Theta Virginis is a white star with two companions, both rather faint, and Phi Virginis is a fixed binary.
	www.novareinna.com /constellation/virgoheaven.html (819 words)

	Virgo (Site not responding. Last check: 2007-10-10)
		Alpha Virginis, Spica (13h 25m -11°10') is a blue-white class B1 giant star of magnitude 1.0.
		Gamma Virginis, Porrima (12h 42m -01°27') is a 2.8 magnitude class F0 blue-white main sequence star.
		Epsilon Virginis, Vindemiatrix (12h 59m +11°14') is a yellow giant G8 class star, 75 light years distant.
	starryskies.com /The_sky/constellations/virgo.html (601 words)

	Virgo Constellation (Site not responding. Last check: 2007-10-10)
		Although there are few bright stars around the galaxy, you can search it from gamma Virginis and trace about 7.6 degrees northwest from the star.
		This field shows you around north west of gamma Vir, Porrima, which is one of most beautiful double stars in spring skies.
		Parent Star: 70 Virginis (HD 117176)(G4V) in the constellation of Virgo is located at a distance of 78 Light Years from our Solar system Co-ordinates of Right Ascension: 13 28 26.541 and Declination: 13 47 12.43.
	home.xtra.co.nz /hosts/Wingmakers/Virgo.html (4103 words)

	Lake County Astronomical Society NightTimes (Site not responding. Last check: 2007-10-10)
		Porrima (Gamma Virginis) falls in the latter category.
		Gamma Virginis is on the Astronomical League’s 100 doubles list, so unless the AL makes a change to the list, some people will be stuck at 99 doubles for awhile!
		In fact, if we compare the Gamma Virginis system to our own Solar System, this star would enter the asteroid belt and then loop out almost twice as far as Neptune orbits around the sun.
	www.bpccs.com /lcas/Articles/porrima.htm (440 words)

	Charlie Fredrickson
		Gamma Virginis is a fairly close system to us, being about 32 light years distant.
		The fact that the components of Gamma Virginis is of equal magnitude actually helps to resolve the pair, as opposed to another binary nearby, Epsilon Bootes, also known as IZAR.
		The positions of the two stars have not changed appreciably in the years that it has been observed, which indicated that the period must be many thousands of years in duration.
	www.palmbeachastro.org /articles/cf980315.htm (476 words)

	spacegazer - March 2005
		Alpha Virginis (Spica), is the 16th brightest star in the sky and an almost perfect example of a 1st magnitude star.
		Gamma Virginis (Porrima), 31 light years distant, is normally a very pretty visual binary, pale yellow through binoculars but, unfortunately, their separation is at minimum now and they will appear to us as a single star for a few years.
		Between Epsilon Virginis (Vindemiatrix) and Beta Leonis (Denebola in Leo) lies one of the most remarkable areas of the heavens.
	www.spacegazer.com /march-2005-g.asp (754 words)

	Crater (Site not responding. Last check: 2007-10-10)
		Capricornus is one of the zodiacal constellations and represents a goat with the tail of a fish.
		Skat (Delta Aquarii), magnitude 3.3; Sadachbia (Gamma Aquarii), magnitude 3.8.
		Principal stars are: Alphard Alpha Hyrdae, magnitude 2.0; Gamma Hydrae, magnitude 3.0 Delta Hydrae, magnitude 4.2; and Beta Hydrae, magnitude 4.3.
	sg-1.tv /constellations (5512 words)

	Canberra Astronomical Society - Southern Cross - June 2004
		There are also many double stars, including the showpiece Gamma Virginis, and a globular cluster.
		Gamma Virginis (1241.7, -0127) is a fine bright yellow binary with a very elongated orbit.
		When I first observed Gamma Vir forty years ago it was an easy pair in a 6-inch Newtonian, at nearly 5” separation; in 1993 at 2.35” it was a neat pair in a 7-inch refractor at 100x.
	msowww.anu.edu.au /cas/southerncross/sc_200406.html (843 words)

	[No title] (Site not responding. Last check: 2007-10-10)
		The picture above shows the apparent orbit of the double star gamma Virginis.
		The Hipparcos parallax of gamma Vir is pi = 84.5 milliarcsec = 0.0845 arcsec so its distance is 1 d = ----- = 11.8 pc 0.0845 2.
		Assuming that the inclination of this orbit is zero (i.e.
	spiff.rit.edu /classes/phys301/homework/gammavir.txt (75 words)

	Gamma Virginis (Site not responding. Last check: 2007-10-10)
		Gamma Virginis was named Porrima by the Romans, after two different goddesses of prophecy in antiquity.
		Porrima is a splendid binary for medium sized telescopes, with an orbit of 168.7 years.
		Theta Virginis will be just in (or out) of your field of vision at the north.
	www.dibonsmith.com /vir_g.htm (234 words)

	Zeta Virginis (Site not responding. Last check: 2007-10-10)
		Zeta Virginis is just north of Spica, about a third of the distance from Spica to Arcturus: binoculars.
		Between zeta Virginis and gamma Virginis (Porrima) is a delightful binary, Struve 1719: two eighth-magnitude stars which, combined, shine with a visual magnitude of 7.0.
		The binary is situated almost exactly in the middle of a triangle formed by gamma, zeta, and delta Virginis: binoculars.
	www.dibonsmith.com /vir_z.htm (91 words)

	March 2001 Star Diagional - OAS
		Gamma Virginis (12h 41min R.A., 1d 27min Dec) is a striking pair of rich yellow stars both similar in brightness.
		Phi Virginis is actually a triple star, all of whose components are a different color.
		The primary star is a deep yellow color; the secondary shows a paler orange hue, the bluish tertiary may be more difficult to find as it shines at 12.4 magnitude and is 93" away.
	physics.weber.edu /palen/OAS/Newsletter/Mar01.htm (1801 words)

	Virgo (Site not responding. Last check: 2007-10-10)
		The brightest star of the constellation is Spica ("ear" of corn, in Latin), a white-blue star which is 260 light-years away from us.
		Eta Virginis is a couple of white-yellow stars that rotate round each other with a 172-year period.
		Currently they are approaching each other and therefore it becomes more and more difficult to distinguish them: the maximum proximity will be reached in 2007, then they will return to get further.
	www.astrofilitrentini.it /mat/costell/vir_e.html (436 words)

	Porrima
		The star Porrima (Scientific Name Gamma Virginis) is located at right ascension 12h 41.660m and declination -1° 26.967'.
		Porrima is a relatively dim star with a magnitude of 3.65.
		It has an Hd number of 110379, an FK5 number of -, and a SAO number of 138917.
	www.absoluteastronomy.com /stars/porrima.htm (55 words)

	Gamma Virginis - oder der Sieg ueber das Seeing
		Gamma Virginis kulminiert in Deutschland bei einer Zenitdistanz von 55°.
		Gamma Virginis war nach meinen bisherigen Erfahrungen mit dem R200SS nicht zu denken.
		Für Gamma Virginis konnte ein Abstand von 0,975 Bogensekunden bei einem Positionswinkel von 240,2° ermittelt werden.
	www.epsilon-lyrae.de /Seeing/Sieg_ueber_das/ArtikelSieg_ueber.html (1613 words)

	Cathedrals of Northern France
		Note that the designation Virginis refers to the traditional identities of stars in Virgo, while other nearby stars from adjacent constellations are included for the sake of completeness.
		Accordingly, stars that are not designated with a member of the Greek alphabet (such as 109 Virginis) may still be included in a traditional view of Virgo while named stars such as Gienah Ghurab and Denebola might also be included in an expanded view of Virgo.
		In fact, the four bright stars: Arcturus, Denebola, Zubenelgenubi, and Gienah Ghurab nicely frame Virgo, and these four might have been viewed by the designers of the Northern France cathedrals to be part of the Virgo symbolism in their plans.
	www.halexandria.org /dward758.htm (3980 words)

	AAVSO: Electronic Journal of the AAVSO (eJAAVSO)
		Gamma Virginis and Zeta Herculis are both binary stars discovered by William Herschel.
		In 1836 one component of gamma Virginis was observed to have eclipsed the other in 1795 and 1826-31.
		Modern orbits for these binaries suggest that future eclipses, or close apparent approaches, should occur in the first decade of the 21st century.
	www.aavso.org /publications/ejaavso/v21n1/55.shtml (73 words)

	My Observing Log: July/August 2000
		I had not been focused on gamma after all; it was zeta, somewhat to the east.
		It was awesome, but at the same time terribly disappointing not to have been able to catch gamma Virginis with such excellent seeing.
		The turbulence was made worse by gamma's low altitude as well as the relatively warm roof, but in the moments of steadier seeing afforded even by those factors, I could see a thin fl space between the two components.
	astro.isi.edu /c5plus/august00.html (2293 words)

	33 Doubles Observing Projects: Gamma Virginis
		Note: I am afraid that my separation estimate of gamma Virginis is biased by the numerous reports already available, but anyhow it seems reasonable.
		Once set up at 22:00 there was an agonising 30 minute wait as the previously clear sky clouded over again but once that had passed it was as clear as a bell.
		Seeing was the best I have ever experienced allowing much higher magnifications (much needed for Gamma Vir) and transparency was also a bit better than average with fewer intrusive lights than normal as most neighbours were already tucked up safely in their beds before Monday brought a return to the daily grind.
	www.carbonar.es /s33/Virgo/Gamma.html (3002 words)

	Journal Comments
		Due to the effects of precession, the First Point of Libra, (also known as the autumn equinox point) lies within the boundaries of Virgo very close to and#946; Vir.
		The stars of the constellation Virgo can be connected in an alternative way, which graphically shows the virgin lying down in a supine position.
		You are the logical type and hate disorder.
	vampirefreaks.com /journal_comment.php?entry=2553819 (705 words)

	[No title] (Site not responding. Last check: 2007-10-10)
		116 Gamma Vir Gamma Virginis 12.6949997 -1.4500000 4.00 4.00 5.00 Double star AL Dbl -1 (Keypad: 303) Gamma* Virginis, one of the best-known binary stars, has a white pair of nearly the same magnitude, nearly 5-seconds apart.
		180 Gamma Ari Gamma Arietis 1.8916667 19.2999992 5.00 5.00 9.00 Double star AL Dbl -1 (Keypad: 264) Gamma* Arietis is a pair of equally bright white stars, 9 seconds apart.
		182 Gamma And Gamma Andromedae 2.0650000 42.3333319 2.00 5.00 10.00 Triple star AL Dbl -1 (Keypad: 266) Gamma* Andromedae is one of the finest coloured doubles, orange and blue.
	www.ilangainc.com /ASTROPLANNER/depository/Top_105_for_LX200.txt (3794 words)

	Hawaiian Astronomical Society - Virgo
		40k JPEG NGC5634 (Bennett 66) is a globular cluster located in eastern Virgo midway between Mu and Iota Virginis.
		170k JPEG NGC4753 (Bennett 55) is a strange little galaxy full of twisted dark lanes, and located 2.7° east of the beautiful double star Porrima (Gamma Virginis).
		NGC5068 (Bennett 59a) anchors a trio of galaxies near the Hydra border, 2° north of Gamma Hydrae.
	hawastsoc.org /deepsky/vir/index.html (2020 words)

	A tour of the night sky - Spring (Site not responding. Last check: 2007-10-10)
		The constellation appears Y-shaped with Spica at the foot of the Y and the arms extending upwards in the general directions of Arcturus and Regulus.
		Identify the separate components of the binary gamma Virginis.
		As usual make a sketch of what you see indicating orientation, date, time and location from which your observation was made.
	www.astro.livjm.ac.uk /courses/one/PRACTI/SKYTOU/N_Apr.htm (467 words)

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