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Topic: Eta Aquilae

	Kids.Net.Au - Encyclopedia > Aquila (Site not responding. Last check: 2007-10-13)
		Two major novae have been observed in Aquila; the first one was in 389 BC and was recorded to be as bright as Venus, the other shone brighter than Altair.
		The double star 15 Aquilae is a yellow K star of 5.4 mag accompanied by a 7th mag star; it can easily be observed with small telescopes.
		The constellation is said to represent the eagle which, in classical Greek mythology, carried the thunderbolts of Zeus and was sent by him to carry the shepherd boy Ganymede, represented by the neighbouring Aquarius, to Mount Olympus where he became the wine-pourer for all the gods.
	www.kids.net.au /encyclopedia-wiki/aq/Aquila (365 words)

	Eta Aquilae
		The eighth brightest star in the constellation Aquila and one of the sky’s most prominent Cepheid variables; its variability was discovered in 1784 by Edward Pigott.
		Eta Aql lies 8° south of Altair and near one of Aquila the Eagle’s talons.
		Eta also represents the head of the now-defunct constellation Antinous, who was honored in the sky by the Roman emperor Hadrian and depicted as being carried by Aquila.
	www.daviddarling.info /encyclopedia/E/Eta_Aquilae.html (197 words)

	AQUILA, in astronomy. The Columbia Encyclopedia: Sixth Edition. 2000 (Site not responding. Last check: 2007-10-13)
		It contains the bright star Altair (Alpha Aquilae) and the pulsating variable star Eta Aquilae.
		Other novas were observed in Aquila in 389 and 1899; two were observed there in 1936.
		Aquila reaches its highest point in the evening sky in late August.
	www.bartleby.com /aol/65/aq/AquilaCon.html (69 words)

	Eta articles on Encyclopedia.com (Site not responding. Last check: 2007-10-13)
		It is a usual symbol for a glottal spirant, murmured (as in the English house) or voiceless (as in the English herb).
		In chemistry H is the symbol for the element hydrogen.
		Aquila AQUILA [Aquila] [Latthe eagle], equatorial constellation located N of Sagittarius and Capricornus, lying partly in the Milky Way.
	www.encyclopedia.com /SearchResults.aspx?Q=Eta (429 words)

	Aquila (constellation) Did You Mean aquila_(constellation) (Site not responding. Last check: 2007-10-13)
		Two major novae have been observed in Aquila; the first one was in 389 BC and was recorded to be as bright as Venus, the other (Nova Aquilae 1918) briefly shone brighter than Altair.
		Aquila, together with other constellations in the Zodiac sign of Sagittarius (specifically, Lyra, Cygnus), may be a significant part of the origin of the myth of the Stymphalian Birds, one of The Twelve Labours of Herakles.
		Aquilae) are separated forever from their mother Zhi Nu (Vega) who is on the far side of the river, the Milky Way.
	www.did-you-mean.com /Aquila_03constellation04.html (462 words)

	Aquila (constellation) at AllExperts
		Constellationname = Aquila abbreviation = Aql genitive = Aquilae symbology = the Eagle RA = 20 dec= +5 areatotal = 652 arearank = 22nd numberstars = 3 starname = Altair (Î± Aql) starmagnitude = 0.77 meteorshowers =
		Two major novae have been observed in Aquila; the first one was in 389 BC and was recorded to be as bright as Venus, the other (Nova Aquilae 1918) briefly shone brighter than Altair.
		Aquila, together with other constellations in the Zodiac sign of Sagittarius (specifically, Lyra, Cygnus), may be a significant part of the origin of the myth of the Stymphalian Birds, one of The Twelve Labours of Herakles.
	en.allexperts.com /e/a/aq/aquila_(constellation).htm (616 words)

	Printable Version on Encyclopedia.com
		AQUILA [Aquila] [Lat.,=the eagle], equatorial constellation located N of Sagittarius and Capricornus, lying partly in the Milky Way.
		Other novas were observed in Aquila in 389 and 1899; two were observed there in 1936.
		Aquila reaches its highest point in the evening sky in late August.
	www.encyclopedia.com /printable.aspx?id=1E1:aquilacon (79 words)

	Constellation Aquila
		Beta Aquilae (Alschain) - This star shines at magnitude 3.7 and it is approximately 44 light years from Earth.
		Eta Aquilae - One of the brightest Cepheid variables, ranging from magnitude 4.1 to magnitude 5.3 every 7.2 days.
		R Aquilae - A variable star of the Mira class, visible with the naked eye at maximum brightness.
	www.nightskyinfo.com /constellations/aquila (535 words)

	Aquila Constellation (Site not responding. Last check: 2007-10-13)
		NGC 6751 is 6,500 light-years distant in the constellation Aquila.
		Aquila's Bayer stars are generally third and fourth magnitude, except Altair (alpha Aql), the twelfth brightest star.
		Chi Aquilae is a close binary with the separation slowly decreasing: 5.6, 6.8; PA 77º, separation 0.5".
	www.udy.com /hosts/Wingmakers/Aquila.html (1611 words)

	@aquila HOME
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		@aquila’s business intelligence will advance technology and eliminate barriers for forward-thinking knowledge workers within corporations that are looking at ways to increase productivity and cut costs at the same time.
		Aquila- (ak'kee la),(ak'we la) [Lat.,=the eagle]; equatorial constellation located N of Sagittarius and Capricornus, lying partly in the Milky Way.
	ataquila.com (203 words)

	Eta Aql
		Near one of the Eagle's talons, Eta also represents the head of the now-defunct no-longer-recognized constellation Antinous, who was honored in the sky by the Roman emperor Hadrian, and depicted as being carried by Aquila.
		The variations of Eta Aquilae, however (as they are for the others listed here), are obvious, the star changing its brightness from magnitude 3.5 to 4.3 and back again over precisely determined period of 7.176641...
		The top graph shows the visual (V) light curve of Eta Aquilae over two cycles, where "phase" is the relative period, which begins with maximum light at 0 and ends with maximum light at 1.
	www.astro.uiuc.edu /%7ekaler/sow/etaaql.html (623 words)

	The First Cepheid by Ken Croswell
		Of these three stars Eta Aquilae is the most luminous, because its pulsation period of 7.18 days exceeds the 5.37-day period of Delta Cephei and the 3.97-day period of Polaris.
		Eta Aquilae lies too far from Earth to have a reliable parallax, but the standard Cepheid period-luminosity relation says that its mean intrinsic brightness is 2,700 times the Sun's.
		This luminosity, along with the star's mean apparent magnitude and the known absorption of light by interstellar dust, implies that Eta Aquilae is 900 light-years away.
	www.kencroswell.com /thefirstcepheid.html (1087 words)

	Aquila
		Aquila, The Eagle, is another ancient constellation whose history is linked to the Greek gods.
		The constellation Aquila is supposed to represent the eagle carrying away the youth.
		Aquila's Bayer stars are generally third and fourth magnitude, except Altair (alpha Aql), the twelfth brightest star.
	www.dibonsmith.com /aql_con.htm (483 words)

	November Newsletter
		Mythology- Aquila, the eagle, was the divine bird of Zeus and the bearer of the sacred thunder.
		It was Aquila who delivered the youth Ganymede to Olympus to become the cup bearer of the gods.
		Alschain (Beta Aquilae) This magnitude 3.7 G8 star at 42 light years away, may be used as a comparison star for the nearby cepheid variable, Eta Aquilae.
	delmarvastargazers.org /newsletter/nov02/page1.html (2139 words)

	November Newsletter
		Mythology- Aquila, the eagle, was the divine bird of Zeus and the bearer of the sacred thunder.
		It was Aquila who delivered the youth Ganymede to Olympus to become the cup bearer of the gods.
		Alschain (Beta Aquilae) This magnitude 3.7 G8 star at 42 light years away, may be used as a comparison star for the nearby cepheid variable, Eta Aquilae.
	www.delmarvastargazers.org /newsletter/nov02/page1.html (2139 words)

	* Eta Aquilae - (Astronomy): Definition
		Eta Aquilae is a cepheid variable: 3.48-4.39 with a period of 7.18 days (more precisely 7 days, 4 hours, 14 minutes and 21.8 seconds).
		The star Alshain (Scientific Name Beta Aquilae) is located at right ascension 19h 55.313m and declination 6° 24.400'.
		Alshain is a relatively dim star with a magnitude of 4.
	en.mimi.hu /astronomy/eta_aquilae.html (92 words)

	Aquila
		The constellation of Aquila, divided into halves by equator, is to the north of Sagittarius, surrounded by some minor constellations such as Sagitta, Delphinus and Scutum.
		In Aquila there is one of the brightest stars of the sky, Altair, which is 16 light-years away from the solar system and is therefore one of the nearest stars.
		An other important star of the constellation is eta Aquilae, one of the brightest variable cepheides: every 7,2 days it varies from the magnitude 4,1 to the magnitude 5,3.
	www.astrofilitrentini.it /mat/costell/aql_e.html (235 words)

	Stargazer
		The star to Altair’s upper left is magnitude 2.8 Tarazed, or gamma aquilae.
		Three finger-widths above eta aquilae is magnitude 3.4 delta aquilae.
		A little more than 1 fist-width to the upper right of eta aquilae is magnitude 3.5 lambda aquilae.
	www.usps.org /national/ensign/stargazerjuly.htm (901 words)

	Constellation Aquila
		Cygnus, the Swan, Corvus, the Raven, and Lyra (in the past known as a Vulture) were all placed in the sky by the gods of Mount Olympus.
		Altair is the brightest star in the constellation; and, flanked by Alshain (Beta-Aquilae) and Tarazed (Gamma-Aquilae), the trio are known as the Family of Aquila and form a pretty, recognizable straight-line group of stars.
		The star Eta Aquilae is a supergiant Cepheid variable which brightens from magnitude 4.4 to 3.5 and dims again with a period of just over a week’s time.
	www.eastbayastro.org /articles/lore/aquila.htm (805 words)

	Gary & Jake - Observation Logs
		The neat thing about Eta Aquilae is that it's a variable star.
		Eta Aquilae is what's known as a cepheid variable.
		In Eta Aquilae's case, it swells up from it's minimum diameter of about 70 times the width of our sun to it's maximum of 80 times the width of our sun in a little under 4 days.
	www.garyandjake.com /logs.php (467 words)

	Aquila
		Aquila should be one of the first constellations that you can identify in the summer sky.
		A famous variable star is located in Aquila - eta Aquilae.
		The milky way makes a spectacular sight through Aquila late on summer evenings.
	www.btinternet.com /~hubbletelescope/aquila.shtml (91 words)

	aquilae zeta.aquilae.org
		Eta Aquilae h Aquilae: Eta Aquilae is an interesting Cepheid variable, easily studied with binoculars.
		Constellation Aquila Altair is the brightest star in the constellation and, flanked by Alshain Beta-Aquilae and Tarazed Gamma-Aquilae, the trio are known as the Family of Aquila and form a pretty, recognizable
		Aquila - The Eagle Altair a Aquilae is the southernmost star in the Summer Triangle the other two are Vega in Lyra and Deneb in Cygnus.
	odontomas.blog1.theviewblog.com /1143396419.html (929 words)

	Bayer objects - Beta Aquilae (Site not responding. Last check: 2007-10-13)
		This pseudo-Arabic name is derived from the Persian language and`andhand+n tarandzandk (or possibly and`andhand+n tara zed; see Gamma Aquilae), the Persian name for the asterism Alpha Aquilae, andbeta; and andgamma; Aquilae.
		Beta Aquilae has apparent magnitude 3.71 and is of stellar classification G8IV.
		It has a 12th magnitude companion, andbeta; Aquilae B, which is 13 arcseconds away on the sky.
	bayer-objects.knolix.com /beta-aquilae-2659701.htm (190 words)

	Aquila (constellation)
		Aquila (Latin for Eagle; sometimes named the Vulture), is one of the 48 constellations listed by Ptolemy, also mentioned by Eudoxus (4th cent.
		The alpha star, Altair, is a vertex of the Summer Triangle asterism.
		In the Chinese love story of Qi Xi, Niu Lang (Altair) and his two children (β and γ Aquilae) are separated forever from their mother Zhi Nu (Vega) who is on the far side of the river, the Milky Way.
	www.danceage.com /biography/sdmc_Aql (618 words)

	[No title]
		So press" "the MODE key on the Autostar and lets begin the adventure." AUTO SLEW ON AUTO SELECT USER 19:50:42 +08d52m00s "Altair" "Altair in the constellation Aquila is the" "12th brightest star in our sky and one that is visible from almost all of the inhabited" "parts of the globe.
		Eta Aquilae varies between 3.5 and 4.4" "magnitude.
		This magnitude 6.7" "cluster seems to show two distinct linear alignments of some of its stars." "Press MODE to hang loose with a stellar group!" AUTO SELECT USER 19:53:48 +18d47m00s "M71" "M71 is a loose globular cluster in the" "constellation Sagitta though in some ways it looks like a compact open cluster.
	www.meade.com /support/auto/AutostarSupportCustomers/DiscoveryChannel/TourFiles/august.mtf (856 words)

	SPA Variable Star Section - SPA 1996 Light Curves
		Betelgeuse, Mu Cephei, Eta Geminorum, Alpha Herculis, R Lyrae, and Rho Persei are semi-regular variables.
		Eta Aquilae, Delta Cephei and Zeta Geminorum are all Cepheid variables - the brightness variations of these stars are due to pulsations which affect their size and surface temperatures.
		RZ Cassiopeiae, Algol and Lambda Tauri are all eclipsing binaries.
	www.popastro.com /sections/vs/l-curves.htm (653 words)

	[No title]
		Near one of the Eagle's talons, Eta also represents the head of the now-defunct no-longer- recognized constellation Antinous, who was honored in the sky by the Roman emperor Hadrian, and depicted as being carried by Aquila.
		The variations of Eta Aquilae, however (as they are for the others listed here), are obvious, the star changing its brightness from magnitude 3.6 to 4.4 and back again over a precisely determined period of 7.176641 days (7d 4h 14m 22s).
		As Eta dims, it dips to spectral class G, the temperature falling from a high of 6200 Kelvin to 5300.
	mailman.depaul.edu /pipermail/skywatch/2001-October.txt (7907 words)

	JBO - Aquila Constellation (Site not responding. Last check: 2007-10-13)
		Altair, Aquila's brightest star is the most southerly of the three stars that make up the summer triangle so, not surprisingly, Aquila is best observed in late summer or autumn.
		Eta Aquila Cepheid Variable Star E B M
		Eta Aquila lies eight degrees (one and a half binocular fields) directly south of Altair.
	www.jb.man.ac.uk /public/AList/Aquila.html (361 words)

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