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      • Arctic Circle latitudes 2045-2049
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Arctic Circle and Antarctic Circle latitudes 2021 +/-.       

Arctic Circle latitudes for the years 2000-2049, every 10 days. They are also suitable for the Antarctic Circle.

This page the year 2021, every 10 days. See subpages at the bottom of this page for more years:

"The table (NAPA2050) was calculated by Prof. Markku Poutanen (Finnish Geodetic Institute) using software written by Dr. Matti Ollikainen (already retired from FGI)."
"The used nutation formulas are taken from The Astronomical Almanac 1984, PP S23-26. The Improved IAU system)".

A copy was sent to me from the National Land Survey of Finland:

Latitude and movement of the Arctic Circle

Since [year,month,day,h,m,s]: 2000  1 1  0 0 0

Until   [year,month,day,h,m,s]: 2050  1 1  0 0 0


      Date          UT            B.Y      Latitude             Days        Movement
 
   Y     M   D  H Min Sec                                                        (metres, meters)


2021   1 10   0  0   .00  2021.03  66 33 46.963       7680.00     82.0
2021   1 20   0  0   .00  2021.05  66 33 46.585       7690.00     70.3
2021   1 30   0  0   .00  2021.08  66 33 46.393       7700.00     64.4
2021   2   9   0  0   .00  2021.11  66 33 46.235       7710.00     59.5
2021   2 19   0  0   .00  2021.14  66 33 45.886       7720.00     48.7
2021   3   1   0  0   .00  2021.16  66 33 45.551       7730.00     38.3
2021   3 11   0  0   .00  2021.19  66 33 45.488       7740.00     36.3
2021   3 21   0  0   .00  2021.22  66 33 45.500       7750.00     36.7
2021   3 31   0  0   .00  2021.25  66 33 45.340       7760.00     31.7
2021   4 10   0  0   .00  2021.27  66 33 45.310       7770.00     30.8
2021   4 20   0  0   .00  2021.30  66 33 45.574       7780.00     39.0
2021   4 30   0  0   .00  2021.33  66 33 45.706       7790.00     43.1
2021   5 10   0  0   .00  2021.36  66 33 45.667       7800.00     41.9
2021   5 20   0  0   .00  2021.38  66 33 45.808       7810.00     46.2
2021   5 30   0  0   .00  2021.41  66 33 46.004       7820.00     52.3
2021   6   9   0  0   .00  2021.44  66 33 46.002       7830.00     52.2
2021   6 19   0  0   .00  2021.47  66 33 45.832       7840.00     47.0
2021   6 29   0  0   .00  2021.49  66 33 45.800       7850.00     46.0
2021   7   9   0  0   .00  2021.52  66 33 45.809       7860.00     46.3
2021   7 19   0  0   .00  2021.55  66 33 45.504       7870.00     36.8
2021   7 29   0  0   .00  2021.57  66 33 45.169       7880.00     26.4
2021   8   8   0  0   .00  2021.60  66 33 45.068       7890.00     23.3
2021   8 18   0  0   .00  2021.63  66 33 44.887       7900.00     17.7
2021   8 28   0  0   .00  2021.66  66 33 44.512       7910.00       6.1
2021   9   7   0  0   .00  2021.68  66 33 44.284       7920.00      -1.0
2021   9 17   0  0   .00  2021.71  66 33 44.287       7930.00      -0.9
2021   9 27   0  0   .00  2021.74  66 33 44.238       7940.00      -2.4
2021 10   7   0  0   .00  2021.77  66 33 44.072       7950.00      -7.5
2021 10 17   0  0   .00  2021.79  66 33 44.146       7960.00      -5.2
2021 10 27   0  0   .00  2021.82  66 33 44.431       7970.00       3.6
2021 11   6   0  0   .00  2021.85  66 33 44.505       7980.00       5.9
2021 11 16   0  0   .00  2021.88  66 33 44.499       7990.00       5.7
2021 11 26   0  0   .00  2021.90  66 33 44.732       8000.00     12.9
2021 12   6   0  0   .00  2021.93  66 33 44.910       8010.00     18.4
2021 12 16   0  0   .00  2021.96  66 33 44.799       8020.00     15.0


The circumference of the Arctic Circle at the 2021 Northern Hemisphere summer solstice at UT 03:32 on 21 June at 66° 33’ 45.883” N, calculated in the WGS84 ellipsoid is predicted to be 15,984.722529869166 km or 9,932.446095967777 international miles or 8,631.059681354841 international nautical miles. Calculated in the WGS84 ellipsoid the area of the Arctic as defined by the Arctic Circle at the 2021 Northern Hemisphere summer solstice is predicted to be 21,207,485.872096 square km or 8,188,256.072475 square international miles.
Circumference calculated, using Charles Karney's Online rhumb line calculations using the RhumbSolve utility: "RhumbSolve is accurate to about 15 nanometers (for the WGS84 ellipsoid)" or 0.000015 of a millimetre/millimeter or 0.00000059 of an inch. In an email to me from Charles Karney: "The accuracy of 15 nanometers that I quote is for paths up to half-way round the earth." On RhumbSolve online: "RhumbSolve performs rhumb line calculations". "The path with a constant heading between two points on the ellipsoid at (lat1, lon1) and (lat2, lon2) is called the rhumb line (or loxodrome)". "NOTE: the rhumb line is not the shortest path between two points; that is the geodesic and it is calculated by GeodSolve. Area personally calculated in the WGS84 ellipsoid using Charles Karney's geodesic polygon calculations using the Planimeter utility. "The result for the area is accurate to about 0.1 m² per vertex."


Subpages:  
Arctic Circle latitudes 2000-2004  
Arctic Circle latitudes 2005-2009
Arctic Circle latitudes 2010-2014
Arctic Circle latitudes 2016-2019
Arctic Circle latitudes 2019-2024
Arctic Circle latitudes 2025-2029 
Arctic Circle latitudes 2030-2034 
Arctic Circle latitudes 2035-2039 
Arctic Circle latitudes 2040-2044 
Arctic Circle latitudes 2045-2049





                                                                                    
   
 

  














   























      














































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