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Topic: Ecliptic latitude

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Deep Ecliptic Survey

Ecliptic coordinate system

ecliptic longitude

ecliptic plane

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ecliptical pole

North Ecliptic Pole

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	Orbits and the Ecliptic Plane
		The ecliptic plane is tilted 23.5° with respect to the plane of the celestial equator since the Earth's spin axis is tilted 23.5° with respect to its orbit around the sun.
		Right ascension and declination are like longitude and latitude on the surface of the Earth except that they are measured with respect to the celestial sphere with the vernal equinox as the origin.
		The ecliptic plane is inclined at 23.5° with respect to the celestial equator because of the tilt of the Earth's rotation axis with respect to the plane of its orbit around the sun.
	hyperphysics.phy-astr.gsu.edu /hbase/eclip.html (870 words)

	Ecliptic - Wikipedia, the free encyclopedia
		It should be distinguished from the invariable ecliptic plane, which is the vector sum of the angular momenta of all planetary orbital planes, to which Jupiter is the main contributor.
		Ecliptic longitude, usually indicated with the letter λ, is measured from this point on 0° to 360° towards the east.
		Ecliptic latitude, usually indicated with the letter β is measured +90° to the north or -90° to the south.
	en.wikipedia.org /wiki/Ecliptic (1507 words)

	Jodrell Bank Observatory: Astronomical Almanac Help (Site not responding. Last check: 2007-10-10)
		The latitude is the angular distance of a point on the Earth's surface north or south of the equator, measured as the angle subtended at the centre of the Earth by an arc along a meridian between the point and the equator.
		The ecliptic latitude of an object in the sky is its angular distance north or south of the ecliptic.
		The ecliptic longitude of an object in the sky is its angular distance (from 0 the 360 degrees) measured eastwards along the ecliptic from the position of the vernal equinox to the intersection of the object's great circle of longitude.
	www.jb.man.ac.uk /almanac/help.html (7137 words)

	* Ecliptic - (Astronomy): Definition (Site not responding. Last check: 2007-10-10)
		The ecliptic is the plane defined by the Earth's orbit around the Sun; conversely, in the course of a year, the sun traces a path in the sky along the ecliptic.
		Axial tilt, or obliquity to the ecliptic, is the tilt of a planet's axis from perpendicular to the plane of the ecliptic.
		These three systems are the equatorial, ecliptic and galactic coordinate systems which use the Earth, the ecliptic plane (the path the Earth takes around the Sun), and the center of our galaxy, respectively, as their central locations.
	www.en.mimi.hu /astronomy/ecliptic.html (1547 words)

	Orbital Elements and Astronomical Terms
		The celestial equator is tilted 23.5 degrees in relation to the plane of the Earth's orbit (the ecliptic).
		The ecliptic is the apparent path of the sun across the celestial sphere over the period of one year.
		Figure 2): The angle between the plane of the orbit and the plane of the celestial equator for Earth orbiting satellites (or the plane of the ecliptic for sun orbiting satellites).
	www.physics.ncsu.edu /courses/astron/orbits.html (1242 words)

	The Hipparcos Space Astrometry Mission: Selected Statistics from the Hipparcos and Tycho Catalogues (Site not responding. Last check: 2007-10-10)
		The distribution is almost independent of the latitude for the same reasons as for the standard error of the ecliptic latitude.
		The systematic strucure is caused by the transformation from ecliptic to equatorial coordinates.
		The median correlation between longitude and latitude in ecliptic coordinates.
	www.rssd.esa.int /Hipparcos/vis_stat.html (846 words)

	Latitude and Longitude - MSN Encarta
		This series of east-west-running circles, known as the parallels of latitude, is crossed at right angles by a series of half-circles extending north and south from one pole to the other, called the meridians of longitude.
		Degrees of latitude are equally spaced, but the slight flattening at the poles causes the length of a degree of latitude to vary from 110.57 km (68.70 mi) at the equator to 111.70 km (69.41 mi) at the poles.
		Each degree of latitude and longitude is divided into 60 minutes, and each minute divided into 60 seconds, thereby allowing the assignment of a precise numerical location to any place on earth.
	encarta.msn.com /encnet/refpages/refarticle.aspx?refid=761563211 (403 words)

	Status Report (Site not responding. Last check: 2007-10-10)
		The system is further defined as having an X axis which points along the vernal Equinox (the line formed by the intersection of the Earth's equator and the ecliptic plane at a reference date) and a Z axis which is perpendicular to the ecliptic plane.
		Latitude is the angle between the pointing vector and the ecliptic plane.
		The terms latitude and longitude are used because they are similar to how we identify the location of a point on the Earth in Spherical coordinates.
	lunar.arc.nasa.gov /printerready/status/longer.html (940 words)

	Longitude (Site not responding. Last check: 2007-10-10)
		Ecliptic latitude and Longitude are defined for the planets, stars, and other celestial bodies in a similar way to that in which the terrestrial counterparts are defined.
		The pole is the normal to the ecliptic nearest to terrestrial north, and the origin of Longitude is the vernal equinox, generally as defined as a point in the J2000 reference frame; thus it is also the origin of celestial longitude.
		Ecliptic Longitude is presumably the one referred to in the astrological context within the entry ephemeris.
	longitude.iqnaut.net (1241 words)

	ECLIPTIC AND EQUATOR
		The ecliptic is the year-long path of the Sun against the background of fixed stars.
		The celestial equator is a projection of the earth's equator, and is inclined to the path of the sun (the ecliptic) by 23.5 degrees.
		Constellations containing portions of the ecliptic are zodiac constellations, and bright stars in zodiac constellations that don't appear on star charts are probably visiting planets.
	homepage.mac.com /kvmagruder/bcp/sphere/ecliptic.htm (354 words)

	Spherical Coordinate System Lab
		The ecliptic latitude is measured in degrees perpendicular to the ecliptic.
		The ecliptic latitude between the ecliptic and the south ecliptic pole is negative.
		The galactic latitude is measured in degrees perpendicular to the galactic equator.
	www.mc.cc.md.us /Departments/planet/planet/Coordinate_Systems_Lab.htm (1626 words)

	Ecliptic coordinate system - Wikipedia, the free encyclopedia
		The ecliptic coordinate system is a celestial coordinate system that uses the ecliptic for its fundamental plane.
		The ecliptic is the path that the sun appears to follow across the sky over the course of a year.
		The latitudinal angle is called the ecliptic latitude (denoted β), measured positive towards the north.
	en.wikipedia.org /wiki/Ecliptic_latitude (765 words)

	Solar Year
		relatively to ecliptic (longitude measures the angle around the ecliptic and latitude measures the angle away from the ecliptic).
		The Earth's spin axis is tilted by 23.5° with respect to the Earth's orbital plane (the ecliptic plane).
		The tilt of the Earth's spin axis with respect to the ecliptic plane results in the Sun tracking out a sinusoidal path on the celestial sphere on the course of the year.
	www.dur.ac.uk /john.lucey/users/solar_year.html (609 words)

	Longitude - Wikipedia, the free encyclopedia
		Ecliptic latitude is measured from 0° to 90° north (+) or south (−) of the ecliptic.
		Ecliptic longitude is measured from 0° to 360° eastward (the direction that the Sun appears to move relative to the stars) along the ecliptic from the vernal equinox.
		Ecliptic longitude relative to a moving equinox is used whenever the positions of the Sun, Moon, planets, or stars at dates other than that of a fixed equinox is important, as in calendars, astrology, or celestial mechanics.
	en.wikipedia.org /wiki/Longitude (1987 words)

	KryssTal : Coordinate Systems
		On the Earth, one degree of Latitude (or Longitude along the equator) is equal to approximately 111km.
		On the Earth, Latitude is the angle North or South of the Equator.
		The Ecliptic is the path of the Sun across the sky during a year.
	www.krysstal.com /coordsystems.html (2563 words)

	Celestial Sphere (Site not responding. Last check: 2007-10-10)
		The latitude is the number of degrees north or south of the Earth's equator.
		Since the ecliptic is tilted 23.5 degrees with respect to the celestial equator, the Sun's maximum angular distance from the celestial equator is 23.5 degrees.
		Like the latitude lines on Earth, declination (Dec) is measured in degrees away from the celestial equator, positive for objects north of the celestial equator and negative for objects south of the celestial equator.
	zuserver2.star.ucl.ac.uk /~idh/STROBEL/nakedeye/nakedeya.htm (3655 words)

	Nicholas deVore, Encyclopedia of Astrology (Site not responding. Last check: 2007-10-10)
		Since the orbits of the planets are inclined to the Ecliptic at an angle of more or less obliquity, each planet, without Latitude when it intersects the Ecliptic, increases in latitude as it approaches the square to its Nodes: for one half its orbit in North Latitude, the other half in South Latitude.
		The ecliptic is inclined to the celestial equator by 23°27'.
		The moon's apparent path on the celestial sphere is inclined to the ecliptic on an average of 5°8', but the intersection points, the nodes, move relatively fast, covering 360° in about 19 years.
	www.zaytsev.com /Devore/l.html (3016 words)

	Starry Night Store: The World's Most Realistic Astronomy Products
		Ecliptic latitude: The angular distance of an object relative to the ecliptic, expressed in degrees.
		The latitude of the Equator, for example, is 0°; Chicago is at 42° North; the North Pole is at 90° North; and Lima, Peru, is at 12° South.
		Latitudes south of the equator are expressed in degrees South or as negative degrees.
	www.starrynight.com /starrynight_dictionary.html (8903 words)

	The Path of the Sun, the Ecliptic
		Planets seen in the sky are always near the ecliptic, which means that their orbits are never too far from the plane of the ecliptic.
		The moon's orbit cuts the ecliptic at a shallow angle, around 5 degrees, which means that on the celestial sphere the Moon, too, follows a path through the zodiac.
		Since the Sun and Earth are in the plane of the ecliptic, the line is automatically in that plane too; if the moon is also on the same line, it must be in the plane of the ecliptic as well.
	www-istp.gsfc.nasa.gov /stargaze/Secliptc.htm (1232 words)

	Celestial Sphere
		The latitude of the north pole is 90°, that of the equator 0°.
		As it moves along the ecliptic against the background stars, which are there even if you cannot see them against the blue sky, the Sun therefore appears also to move north and south of the celestial equator.
		In the tropics (between latitudes 23.4°N at the Tropic of Cancer and 23.4°S at the Tropic of Capricorn) the Sun can be overhead sometime during the year (on June 21 at the former, on December 22 at the latter).
	www.astro.uiuc.edu /~kaler/celsph.html (2082 words)

	The Ecliptic
		The fact that the ecliptic longitudes of fixed stars that are very removed from the ecliptic are astrologically "alive" is, I think, one of several independent indicators that there is a great deal more to the ecliptic, as a modulus, than we actually tend to grant, or even imagine.
		On the ecliptic, the "x" is longitude of course, and the "y" is Latitude.
		That's the corollary of the axiom of ecliptic modularity.
	www.winshop.com.au /annew/Gonzo.htm (495 words)

	SSC:FLS: Ecliptic Component
		The ecliptic plane component (EPC) of the FLS concentrated on two 0.13 square deg fields at a solar elongation of 115 degrees and ecliptic latitudes (beta) of 0 degrees and +5 degrees.
		Two rectangular fields of approximately 10' x 0.8 degree (0.13 square degrees) will be observed at 0 and +5° ecliptic latitude, to probe scale height drop-off in the asteroid population.
		This field shape was chosen as a compromise between instrument observing mode efficiency, which favors long scan strips, and the desire for greater spread parallel to the ecliptic plane to minimize loss of asteroids off the detection area.
	ssc.spitzer.caltech.edu /fls/eclip (1301 words)

	LAMBDA - Infrared Astronomical Satellite
		Ecliptic bins start at the ecliptic north pole and step around the sky in bands of constant ecliptic latitude, stepping 1° southward after completing each band.
		The length of the bin in ecliptic longitude is adjusted for the cosine of the ecliptic latitude to maintain an approximately constant area.
		There is a known bug in the computation of bins at ecliptic latitude 60°, causing bin 2842 to be skipped.
	lambda.gsfc.nasa.gov /product/iras/hsdb_format.cfm (253 words)

	Almagest Star Catalogue for Guide users
		Ecliptic longitude, given in degrees and minutes of arc within one of the twelve zodiacal signs.
		Ecliptic latitude, given in degrees and minutes of arc, plus the indication of North or South of the Ecliptic.
		The ecliptic coordinates were converted to equatorial by the usual formulae, using the obliquity of the ecliptic (23° 42' 39") given by Newcomb formulae for the year 127 BC (the date Ptolomaeus believed was the epoch of Hipparchus catalogue)
	www.projectpluto.com /almagest.htm (2078 words)

	The Basics - the Ecliptic, the Equator and Coordinate Systems
		This is exactly the same as describing latitude on the surface of the Earth, except we use the Ecliptic in place of the Earth's Equator.
		It is a circle that bands the sphere of the Earth at it's thickest point, defining 0° of terrestrial latitude and separating the northern hemisphere from the southern hemisphere.
		However, where Celestial Latitude measures counter-clockwise, Right Ascension measures clockwise from this point, with the measurement being expressed either in degrees, minutes, and seconds of arc, or in hours, minutes, and seconds of time.
	www.astrologyclub.org /articles/ecliptic/ecliptic.htm (2039 words)

	The Ancient Star Catalog: a question of authorship
		This error in latitudes is positive at the spring equinox, negative at the autumn equinox, and near zero at the solstices.
		When we look at the actual latitude errors, it is clear that this wave is mostly an obliquity error and that very little is a cosine wave caused by astrolabe misrotation.
		The latitude errors show that observer of the catalog must have aligned his astrolabe with the ecliptic correctly to within a third of a degree in longitude.
	www.nd.edu /~histast4/exhibits/papers/Pickering (2184 words)

	P3001 Ecliptic Coordinates (Site not responding. Last check: 2007-10-10)
		The major planets and the sun are all aligned near perfectly in a single orbital plane.
		Because of the importance which astrology placed on the alignment of the planets, those constellations which lay in the ecliptic plane had special significance and are called the zodiac constellations.
		Another commonly used celestial coordinate system is based on the ecliptic - with coordinates being given as ecliptic longitude and ecliptic latitude (e.g.
	www.mta.ca /~rhawkes/courses/3001/ecliptic.html (92 words)

	Starry Night Manual (Ecliptic Guides)
		Ecliptic guides are based on the ecliptic, which is the plane of the Earth's orbit around the Sun, and are measured by the celestial latitude and celestial longitude.
		The celestial latitude is measured from 0 at the ecliptic to 90 North and -90 South at the ecliptic poles.
		Ecliptic guides can be toggled on and off via the Guides menu or Display palette.
	www.starrynight.com /manual/o_ecliptic.htm (316 words)

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