Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

Selenographic coordinates - Wikipedia, the free encyclopedia Selenographic coordinates are used to refer to locations on the surface of Earth's moon. The coordinates of this crater are defined as: The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian. en.wikipedia.org /wiki/Selenographic_colongitude   (431 words)

Coordinates (elementary mathematics) Encyclopedia   (Site not responding. Last check: 2007-10-07) Coordinates such as these are also important in astronomy for describing the location of objects in the (night) sky: see Celestial coordinate systems for further examples. The circular coordinate system, commonly referred to as the polar coordinate system, is a two-dimensional polar coordinate system, defined by an origin, O, and a ray (or semi-infinite line) L leading from this point. In mathematics, barycentric coordinates are coordinates defined by the vertices of a simplex. www.hallencyclopedia.com /Coordinates_(elementary_mathematics)   (1435 words)

Planetographic Coordinates A uniform coordinate system is used throughout Scientific Astronomer for specifying longitude and latitude on the surface of an object. Geographic coordinates are used on the surface of the Earth. Alternative titles, such as areographic coordinates on Mars, selenographic coordinates on the Moon, and heliographic coordinates on the Sun, are sometimes used to refer to the equivalent systems. documents.wolfram.com /applications/astronomer/AdditionalInformation/PlanetographicCoordinates.html   (706 words)

Selenographic colongitude - Definition, explanation Selenographic coordinates are coordinates that refer to locations on the surface of the Moon. The selenographic co-longitude is the longitude of the morning terminator on the Moon, as measured in degreess westwards from the central meridian. The selenographic co-longitude at sunrise is used for this purpose. www.calsky.com /lexikon/en/txt/s/se/selenographic_colongitude.php   (333 words)

Mare Tranquillitatis - Definition, explanation The selenographic coordinates of this feature are 3.8° S, 27.4° E, and it has a diameter of 206 km. The selenographic coordinates of this bay are 10.8° N, 43.2° E, and it has an overall diameter of 142 km. The selenographic coordinates of this feature are 11.7° N, 18.1° E, and it has a diameter of 109 km. www.calsky.com /lexikon/en/txt/m/ma/mare_tranquillitatis.php   (674 words)

Vally News Dispatch -- Recommendations and Resources   (Site not responding. Last check: 2007-10-07) The selenographic coordinates of this feature are 31.1° S, 56.0° E, and it has a maximum diameter of 592 km, making it the longest named valley on the Moon. The selenographic coordinates of this valley are 26.2° N, 50.8° W, and it has a maximum diameter of 168 km. The selenographic coordinates of this feature are 48.5° N, 3.2° E. The valley floor is a flat, lava-flooded surface that is bisected by a slender, cleft-like rille. www.becomingapediatrician.com /health/155/vally-news-dispatch.html   (1283 words)

Open Channel Foundation: SUNTRACKER Selenographic longitudes are measured positive in the direction towards Mare Crisium from the lunar meridian passing through the origin. Selenographic latitudes are measured positive towards the northern hemisphere containing Mare Serenitatis, from the lunar equator. The selenographic co-longitude is obtained by subtracting the selenographic longitude from either 90 or 450 degrees. www.openchannelfoundation.org /projects/SUNTRACKER   (447 words)

planetocentric and planetographic coordinates Specific terms are used when referring to familiar bodies: heliocentric and heliographic coordinates for the Sun; selenocentric and selenographic for the Moon; geocentric and geographic for the Earth; areocentric and areographic for Mars; zenocentric and zenographic for Jupiter; saturnicentric and saturnigraphic for Saturn; and so forth. Planetocentric coordinates are referred to the equatorial plane of the body concerned and are much used in the calculations of celestial mechanics. Planetographic coordinates are used for observations of the surface features of those planets whose figures are not truly spherical, but oblate. www.daviddarling.info /encyclopedia/P/planetocentric_coordinates.html   (273 words)

[No title] All output has been rounded to one decimal place for the selenographic coordinates, and whole degrees for the position angles. References ---------- The formulas for the Moon's geocentric coordinates, the siderial time, days since J2000.0, coordinate transformations and all the formulas for calculating the output quantities were modified and simplified from Jean Meeus' book 'Astronomical Algorithms' (1st Edition) published by Willmann-Bell, ISBN 0-943396-35-2. The formulas for the Sun's geocentric coordinates, and the common sense topocentric correction for the Moon's position (ignoring the polar flattening of Earth), were taken from the Astronomical Almanac pages C24 and D46. www2.arnes.si /~gljsentvid10/tmoon.c   (1396 words)

Sea_of_tranquility info here at en.brandworkshops.info   (Site not responding. Last check: 2007-10-07) To the north of the bay are the jumbled Montes Taurus peaks. The selenographic coordinates of this bay are 10.8° N, 43.2° E, and it has an overall diameter of 142 km. The selenographic coordinates of this feature are 11.7° N, 18.1° E, and it has a diameter of 109 km. en.brandworkshops.info /how-to-write-a-feature-story/Sea_of_Tranquility   (771 words)

Selenographic coordinates at AllExperts Astronomers defined the fundamental location in the selenographic coordinate system by the small, bowl-shaped satellite crater 'Mösting A'. The coordinates of this crater are defined as: The value of the selenographic colongitude increases from 0° to 359° in the direction of the advancing terminator. en.allexperts.com /e/s/se/selenographic_coordinates.htm   (528 words)

Mons Hadley Information Mons Hadley is a massif is the northern portion of the Montes Apenninus, a range in the north hemisphere of the Moon. The selenographic coordinates of this peak are 26.5° N, 4.7° E. It has a height of 4.6 km and a maximum diameter of 25 km at the base. The coordinates of this peak are 25.8° N, 3.8° E. To the west of these peaks is the sinuous Rima Hadley rille. www.bookrags.com /wiki/Mons_Hadley   (242 words)

Digital Lunar Orbiter Photographic Atlas of the Moon, Introduction selenographic coordinates of the corners of ground coverage by each photograph. Because of the unequal lengths of the sections, the center coordinates given at the bottom of the photographs are located only approximately in the center of the middle section (designated H2). The alphanumeric coordinates of major features are given at the bottom of each photograph. www.lpi.usra.edu /research/lunar_orbiter/book/introduction.shtml   (3527 words)

ronbun For a given shower,the selenographic coordinates of the subradiant point are calculated from the equatorial coordinates of the radiant as determined from Earth,the location of the Earth in its orbit with respect to the Sun,and the location of the Moon with respect to our planet at the time of the shower's maximum activity. It is clear that the selenographic longitude of the subradiant point is ƒÕ=l-le-X,whereas the selenographic latitude must coincide with the ecliptic latitude of the radiant because of our approximation that the lunar equator has a zero inclination to the ecliptic. At this point we note that selenographic longitudes are measured from the central meridian counterclockwise as seen from the lunar north pole. www.asahi-net.or.jp /~ep5k-icmr/kyohey/ronbun.html   (6023 words)

Space-Time Coordinate Metadata for the Virtual Observatory Spatial coordinates are special in that they can be explicitly multi-dimensional and that they serve positions as well as their first time derivatives (physical velocities – not to be confused with redshifts or Doppler velocities). If the coordinate system is defined on the surface of a body (rather than the celestial or unit sphere), one should multiply by the square of the radius. It is specified by a center position and size (in both coordinates) defining a cross centered on the center position and with arms extending, parallel to the coordinate axes at the center position, for half the respective sizes on either side. hea-www.harvard.edu /~arots/nvometa/v1.2/STC.html   (6623 words)

OCEANUS PROCELLARUM FACTS AND INFORMATION   (Site not responding. Last check: 2007-10-07) The IAU-defined selenographic coordinates of this bay are 54.0° N, 56.6° W, and the diameter is 202 km. These can ranging out as far as the Gerard and Repsold craters to the west, Harpalus crater to the east, and as far south as 44° N latitude, approaching Mons Rümker. The area where the official coordinates place this bay has a generally higher albedo than the mare to the south, most likely due to deposits of ''ejecta'' from impacts to the north. vintagebotanicals.com /Oceanus_Procellarum   (337 words)

Fine-Scale Lunar Magnetic Field First, the three field components in spacecraft coordinates were computed from the transverse magnitude, the zero crossing delay, the sun pulse delay and the component parallel to the spin axis. The altitude dependence of the radial component of the fine-scale magnetic field for the four selenographic quadrants as observed by the Apollo 15 subsatellite. The altitude dependence of the radial component of the fine-scale magnetic field for the four selenographic quadrants as observed by the Apollo 16 subsatellite. www-spc.igpp.ucla.edu /personnel/russell/papers/Lunar   (4491 words)

STC Metadata for the VO One must be able to transform the coordinates of two observations to a common coordinate system; this means that every little tidbit of information needs to be documented in the metadata. Classes that are derived from Coordinate may differ in the data types of the objects, their structure and meaning, as well as restrict allowable values for Unit. The Coordinate Area class defines the volume in coordinate space that is occupied by the object it is attached to. www.ivoa.net /Documents/PR/STC/STC-20050315.html   (4735 words)

The permanent and induced magnetic dipole moment of the moon selenographic meridian for data obtained in the north lobe. Figure 2 shows the average residuals as a function of orbit azimuth for the radial, tangential, and perpendicular components in the north lobe of the tail. selenographic meridian and j is in the orbit plane 90 www-ssc.igpp.ucla.edu /personnel/russell/papers/permanent(7)   (4528 words)

Amazon.com: selenographic   (Site not responding. Last check: 2007-10-07) Lunar ephemeris [and] selenographic coordinates of the earth and sun for 1971 and 1972 (NASA SP-3057) by Ann D Hartung (Unknown Binding - 1972) "A minor triangulation of the Mare Imbrium;": A catalogue of secondary selenographic positions in the Mare Imbrium determined from measurements on a Mount... The determination of selenographic positions and the measurement of lunar photographs: [Fifth paper] Results of the measurement of two Yerkes negatives (Memoirs of the Royal astronomical society) by Samuel Arthur Saunder (Unknown Binding - 1911) www.amazon.com /s?ie=UTF8&keywords=selenographic&index=blended&page=1   (868 words)

[No title] All output has been rounded to one decimal place for the selenographic coordinates, and whole degrees for the position angles. References ---------- The formulas for the Moon's geocentric coordinates, the siderial time, days since J2000.0, coordinate transformations and all the formulas for calculating the output quantities were modified and simplified from Jean Meeus' book 'Astronomical Algorithms' (1st Edition) published by Willmann-Bell, ISBN 0-943396-35-2. The formulas for the Sun's geocentric coordinates, and the common sense topocentric correction for the Moon's position (ignoring the polar flattening of Earth), were taken from the Astronomical Almanac pages C24 and D46. bodmas.org /kepler/tmoon.c   (1312 words)

Lunar libration and co-longitude This page contains simplified approximate formulas for calculating the optical libration in longitude and latitude, the selenographic coordinates of the sub-solar point and the position axes of the Moon's polar axis and bright limb. The 'sub-solar point' is a point on the Moon where the Sun is overhead, ie the 'pole' of the illuminated hemisphere. By working out the selenographic coordinates of this point, we can calculate the appearance of the bright limb of the moon for any given time. www.bodmas.org /kepler/mooneph.html   (848 words)

Practical Astronomy with your Calculator - Cambridge University Press The major topics are: time, coordinate systems, the Sun, the planetary system, binary stars, the Moon, and eclipses. In the third edition there are entirely new sections on generalised coordinate transformations, nutrition, aberration, and selenographic coordinates. The calculations for sunrise and moonrise are improved. www.cup.cam.ac.uk /aus/catalogue/print.asp?isbn=0521356997&print=y   (354 words)

!! L5Development.com - Space History for October 29 NASA's Lunar Orbiter 1 impacted the Lunar surface, on command, at 7 degrees N latitude, 161 degrees E longitude (selenographic coordinates) on the Moon's far side on its 577th orbit. The spacecraft was tracked until it impacted the Lunar surface on command at 7 degrees N latitude, 161 degrees E longitude (selenographic coordinates) on the Moon's far side on 29 October 1966 on its 577th orbit. The early end to the nominal one year mission was due to the small amount of remaining attitude control gas and other deteriorating conditions, and was executed to avoid transmission interference with Lunar Orbiter 2. l5development.com /i_resource/history/DayInHistory.php?d=1029   (2173 words)

Vallis Bohr - Wikipedia, the free encyclopedia This wide cleft has a length of about 80 kilometers, and is radial to the Mare Orientale impact basin further to the south. The selenographic coordinates of this feature are 12.4° N 86.6° W. This page was last modified 19:04, 10 December 2005. en.wikipedia.org /wiki/Vallis_Bohr   (78 words)

Multiyear Interactive Computer Almanac Mean orbital elements, elements of rotation; ecliptic and equatorial coordinates; heliographic coordinates, horizontal parallax, semi-diameter and time of transit; geocentric rectangular coordinates; low-precision formulae for coordinates of the Sun and the equation of time. Phases; perigee and apogee; mean elements of orbit and rotation; lengths of mean months; geocentric, topocentric and selenographic coordinates; formulae for libration; ecliptic and equatorial coordinates, distance, horizontal parallax, semi-diameter and time of transit; physical ephemeris; daily polynomial coefficients; low'-precision formulae for geocentric and topocentric coordinates. Osculating elements for periodic comets; geocentric equatorial coordinates and time of transit for Ceres, Pallas, Juno and Vesta; orbital elements, magnitudes and dates of opposition of the larger minor planets. www.willbell.com /almanacs/AstronomicalAlmanac1994.htm   (266 words)

!! L5Development.com - Space History for January 31 NASA's Lunar Orbiter 5 impacted the Moon on command at 2.79 degrees S latitude, 83 degrees W longitude (selenographic coordinates). The spacecraft was tracked until it impacted the Lunar surface on command at 2.79 degrees S latitude, 83 degrees W longitude (selenographic coordinates) on 31 January 1968. The main bus of the Lunar Orbiter was approximately a truncated cone, 1.65 meters tall and 1.5 meters in diameter at the base. l5development.com /i_resource/history/DayInHistory.php?d=0131   (2246 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.