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Topic: Minute of arc


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In the News (Tue 18 Jun 19)

  
  Minute - Wikipedia, the free encyclopedia
In geometry, a minute is a unit of angle, 1/60th of a degree.
The symbol for a minute of arc is a prime (′).
A minute of arc at the Earth's equator is approximately a nautical mile.
en.wikipedia.org /wiki/Minute   (313 words)

  
 Minute of arc - Wikipedia, the free encyclopedia
A minute of arc, arcminute, or MOA is a unit of angular measurement, equal to one sixtieth (1/60) of one degree.
Minutes of angle (and its subunit, seconds of angle or SOA—equal to a sixtieth of a MOA) are also used in cartography and navigation.
Traditionally positions are given using degrees, minutes, and seconds of angles in two measurements: one for latitude, the angle north or south of the equator; and one for longitude, the angle east or west of the Prime Meridian.
en.wikipedia.org /wiki/Minute_of_arc   (710 words)

  
 Minute of arc: Encyclopedia topic   (Site not responding. Last check: 2007-11-05)
A minute of arc, arcminute, or MOA is a unit of angular measurement (angular measurement: an angle (from the lat....
At sea level, one minute of angle equals about 1.15 miles or 1.86 km, approximately one nautical mile (nautical mile: A unit of length used in navigation; equivalent to the distance spanned by one minute of arc in latitude; 1,852 meters) (approximately, because the Earth is slightly oblate).
The subdivision of the minute of arc is the arcsecond (arcsecond: A 60th part of a minute of arc).
www.absoluteastronomy.com /reference/minute_of_arc   (481 words)

  
 Wikipedia: Arc
A minute of arc is an angle measure, being 1/60 of a degree.
A second of arc is 1/60 of a minute of arc.
Arc is also a name for a dialect of the Lisp programming language.
www.factbook.org /wikipedia/en/a/ar/arc.html   (87 words)

  
 Minute of arc: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-11-05)
A degree (or in full degree of arc), usually symbolized by the symbol °, is a measurement of plane angles, or of a location along a great circle of a...
A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 ≈...
A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, EHandler: no quick summary.
www.absoluteastronomy.com /encyclopedia/m/mi/minute_of_arc.htm   (915 words)

  
 Minute of arc - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-11-05)
Since one degree is defined as one three hundred and sixtieth (1/360) of a circle, 1 MOA is 1/21600 of the amount of arc in a closed circle, or (π/10800) radians.
However, because of the somewhat clumsy base-60 nature of MOA and SOA, many people now prefer to give positions using degrees only, expressed in decimal form to an equal amount of precision.
The subdivision of the minute of arc is the arcsecond.
www.brownsville.us /project/wikipedia/index.php/Minute_of_arc   (513 words)

  
 Measurement of angles   (Site not responding. Last check: 2007-11-05)
Then the radian measure of the angle is the ratio of the length of the subtended arc to the radius of the circle.
On a circle of radius 5.782 meters the length of an arc is 1.742 meters.
Since the length of the arc equals radius times the angle in radians, it follows that the angle in radians equals the length of the arc divided by the radius.
aleph0.clarku.edu /~djoyce/java/trig/angle.html   (1768 words)

  
 ARC Athletics - Men's Basketball Home
ARC was able to cut Delta’s 15-point advantage to eight six minutes into the second half, but the Mustangs—as good teams do—hit clutch shot after clutch shot to pull away from the Beavers.
ARC put up only 18 points in the first 20 minutes, but held DVC to just 22 in the second half and forced an overtime when George Golden nailed a 3-pointer with 4 seconds left in regulation.
ARC was down 12 at the half but came back strong to take a brief lead, but then went scoreless the first three minutes of overtime.
www.arc.losrios.edu /~sports/mbasketball   (2545 words)

  
 Graticule and Map Scale   (Site not responding. Last check: 2007-11-05)
A nautical mile is defined as one minute of arc at the equator.
As one moves from parallel to parallel between the equator and the poles, the distance between two meridians one minute of arc apart, along a parallel, is no longer equal to ~6000 feet (or one nautical mile).
For example, the distance between two meridians one minute of arc apart at the equator is ~6,000 feet.
www.accd.edu /sac/earthsci/rudnicki/2470/gratmapscal.htm   (774 words)

  
 Lecture: Latitude, Dr. Rodrigue
Minutes of arc are similar to minutes of time in that one minute of latitude is 1/60th of a degree, and there are 60 minutes of arc in 1 degree.
One second of arc is 1/60th of a minute; there are 60 seconds of arc in a minute b.
Put another way, one second of arc is 1/3600th of a degree, and that means there are 3600 seconds in a degree (kind of like there are 3600 seconds in an hour).
www.csulb.edu /~rodrigue/geog140/lectures/latitude.html   (2425 words)

  
 minute - Wiktionary
A unit of angle equal to one-sixtieth of a degree.
A minute of use of a telephone or other network, especially a cell phone network.
On 17 November 1949 Jay minuted Cripps, arguing that trade liberalization on inessentials was socially regressive.
en.wiktionary.org /wiki/minute   (349 words)

  
 [No title]   (Site not responding. Last check: 2007-11-05)
Geometrically, a circle can be divided up into 360 degrees of arc, with each degree further divisible into 60 minutes of arc and each minute into 60 seconds of arc.
Just to give a feel for how big these angles are, consider that a quarter viewed face-on from across the length of a football field has a diameter of about 1 minute of arc, while the tip of a ballpoint pen viewed from the same distance has a diameter of about 1 second of arc.
In speaking, we resolve this confusion by talking about degrees, arcminutes (or minutes of arc), and arseconds (or seconds of arc) as opposed to hours, minutes, and seconds; in writing we write 1°, 1', 1" as opposed to 1h, 1m, 1s.
campus.lakeforest.edu /~bell/astro/celcoords.html   (595 words)

  
 Longitude and Latitude: GEOG 101
Degrees of arc are a measure of the size of the angle created when two lines or two plane intersect.
One minute of arc can be further subdivided into yet smaller fractions of a degree called seconds (again, don't confuse this with the seconds that we use to measure time - they are not the same thing).
One minute of arc is equal to 60 seconds of arc, 1' = 60" - the double tick mark is used to designate seconds.
facweb.bhc.edu /academics/science/harwoodr/GEOG101/Study/LongLat.htm   (1006 words)

  
 Astronomy Without a Telescope   (Site not responding. Last check: 2007-11-05)
A quarter viewed face-on from across the length of a football field is about 1 arc minute across.
Each minute of arc is divided into 60 seconds of arc.
The arc from the north point on the horizon to the point directly overhead to the south point on the horizon is 180 degrees, so any object directly overhead is 90 degrees above the horizon and any object ``half-way up'' in the sky is about 45 degrees above the horizon.
www.astronomynotes.com /nakedeye/s3.htm   (244 words)

  
 Climate grids and Shape files  - Floramap - Land Use - CIAT   (Site not responding. Last check: 2007-11-05)
An interpolated climate grid at 10 minutes of arc for Africa.
An interpolated climate grid at 10 minutes of arc for Latin America.
An interpolated climate grid at 2.5 minutes of arc for Asia from 64E to 170 E 15S to 30N.
www.ciat.cgiar.org /floramap/ing/climate-grid2.htm   (527 words)

  
 Angular measure   (Site not responding. Last check: 2007-11-05)
If you are unfamiliar with angular measure, there are 90° in a right angle; 60 minutes of arc in one degree; and 60 seconds of arc in a minute.
Minutes of arc are designated by a (') sign; so “ 30' ” is read “30 minutes”.
But the arc length of the whole circle is the circumference of the circle, or 2 pi times the radius of the circle.
mintaka.sdsu.edu /GF/explain/atmos_refr/angles.html   (507 words)

  
 Vernier scale   (Site not responding. Last check: 2007-11-05)
The circle is graduated with such accuracy that the error in the position of the various scale marks is much less than one minute of arc (the smallest interval readable on the verniers).
In spite of years of experience, instrument makers have never found it possible to assemble the circle and verniers onto the instrument bearings with as geat accuracy as can be obtained in the engraving of the scales themselves.
This minute departure from exact alignment produces small errors which are of opposite sign on opposite sides of the circle and are completely eliminated from the average of two opposite vernier readiings.
physics.usask.ca /~angie/ep421/lab1/vernier.htm   (279 words)

  
 The USS Liberty Inquiry Forum - El Arish Minaret Visibility   (Site not responding. Last check: 2007-11-05)
For this analysis, 1 minute of arc will be used as the human eye resolution limit.
Thus, if 1 arc minute is truly the resolution limit for the human eye, and it was truly possible to see the minaret, and its estimated measurements are close to actual, then the attack must have occured at a location different than that cited by the NCOI; i.e., closer to El Arish than currently reported.
Recently, I found an article that suggests typical human eye resolution is better than 1 arc minute: http://clarkvision.com/imagedetail/eye-resolution.html The article cites 0.6 arc minute as being a limit.
www.usslibertyinquiry.com /forums/showthread.php?p=4902   (1867 words)

  
 Adventures in Ancient Egyptian Geodesy   (Site not responding. Last check: 2007-11-05)
A sharp unaided eye can resolve double stars to 3.5 arc minutes, which is the separation of the two principal components of the famous double-double star Epsilon Lyrae.
The pyramid's perimeter (P), at 1/2 arc minute of latitude, is 1/43,200 of the earth's circumference, and the perimeter/height ratio P/H = 2
As for the perimeter length, its approximation to 1/2 arc minute of latitude is merely a coincidence.
home.globalcrossing.net /~kjohnson/marble.htm   (4617 words)

  
 Math Forum - Geometry Problem of the Week
It was originally defined to be the length of one minute of arc of a great circle of the earth.
Figure out what the nautical mile would be for each of these circles (remember, it's the length of one minute of arc of the great circle), and tell me if you think 1.852 kilometers is a good compromise.
Okay, now the second step to the problem: Remembering what you had said, that one minute of latitude was a nautical mile, and knowing that 1 degree of a circle is 1/360 and that a minute is 1/60 of an hour, we multiplied 1/360 by 1/60 and we got 1/21600.
mathforum.org /pow/solutio69.html   (1386 words)

  
 Orion Telescopes and Binoculars   (Site not responding. Last check: 2007-11-05)
One arc minute is 1/60th of a degree.
Just as there are 60 minutes in one hour of time, there are 60 arc minutes in a one-degree angle.
The full moon is about 30 arc minutes in diameter.
www.telescope.com /sdx/176319.jsp   (554 words)

  
 Glossary of astronomical terms
There are 60 seconds (denoted 60") of arc in one minute of arc.
In turn, a degree is composed of 60 minutes of arc, and also of 3600 seconds of arc.
In the case of comets, we speak of a magnitude that is "integrated" over an observed coma diameter of several arc minutes; this is called the comet's "total (visual) magnitude", and is usually denoted by the variable m
cfa-www.harvard.edu /icq/ICQGlossary.html   (3501 words)

  
 Document: Shrinking Star Diameters
The Zeiss Model I of 1923, the prototype of all projection planetariums, had an angular resolution of about 25 minutes of arc for the brightest (0th magnitude) stars.
The most natural impression is achieved if the apparent star diameters are in the order of the human eye's resolving power of one to two minutes of arc.
With the fiber principle, star projections can have diameters subtending one minute of arc, so that all stars appear as needle-sharp, beaming points.
www.zeiss.com /C12567B00038CD75/ContentsWWWIntern/EF3A2074600A4130C1256943005F365D   (91 words)

  
 Visual Perception   (Site not responding. Last check: 2007-11-05)
Visual acuity is measured as the angle subtended by the human eye.
For well lit objects directly in front of the eye, it is about 1 minute of arc (arcminute).
Note that 20/20 vision corresponds to recognizing letters that are 5 minutes of arc.
www.siggraph.org /education/materials/HyperVis/virtual.env/percept.iss/percept.htm   (575 words)

  
 Textileweb.com Measurement Converter
minute of arc = 2.90888208665722E-04 radian (plane angle)
Try converting from "arc min" to arc minute (minute of arc), arc s (second of arc), centesimal minute, centesimal second, circle, degree (Pi rad / 180), grade, octant, quadrant, rad (radian), revolution, sextant, sign, turn, or any combination of units which equate to "plane angle" and represent plane angle.
arc min = 1 arc minute (minute of arc), 60 arc s (second of arc), 1.85 centesimal minute, 185.19 centesimal second,.0000463 circle,.01666667 degree (Pi rad / 180),.01851852 grade,.00037037 octant,.00018519 quadrant,.00029089 rad (radian),.0000463 revolution,.00027778 sextant,.00055556 sign,.0000463 turn.
www.convertit.com /Go/Textileweb/Measurement/Converter.ASP?From=arc+min   (108 words)

  
 USGS Digital Elevation Models: 2-Arc-Second DEM's
Elevation data on the integer minute lines (all four sides) correspond to the same profiles on the surrounding eight blocks.
Elevations are in meters or feet relative to NGVD 29 in the continental U.S. and local mean sea level in Hawaii and Puerto Rico.
The first and last data points are at the integer 15 minutes of latitude.
rockyweb.cr.usgs.gov /elevation/2arcinfo.html   (359 words)

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