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Gorsedd Circle

Gorsedd Circle The Gorsedd Circle is a stone circle in Fishguard, Wales. The Gorsedd Stones are a Welsh tradition of modern stone circles constructed for the National Eisteddfod of Wales. These stone circles can be found at several locations, including Aberdare Park and Anglesey. They are typically 20 metres wide and have 12 stones on the circumference with a level stone in the circle. A further stone is usually set back from the circumference; the central stone is called the Logan Stone. Coordinates 51.996431,-4.975040 Stone Circle  Gorsedd Circle is a typical stone circle but has 13 stones on the circumference with one inset. It was erected in 1936 and has the names of the parishes inscribed on each stone. Ceremony  During the opening ceremony, the Archdruid stands on the Logan Stone facing the Stone of the Covenant. Two stones mark the entrance and are called the Portal Stones. These mar k the midsummer and midwinter sunrises. Gorsedd Circle  (no edit) Archeology7...

Mên-an-Tol

Mên-an-Tol
CC BY-SA 0.0


Summer and winter solstice measurements in Neolithic times!

So how was a spring or autumn equinox or for that matter summer winter solstice measured?

The answer is that they would have used a large ring with a stone marker behind the object being measured. This would give an angle, but also knowing the size of the ring and the distance that the marker was behind could give multiple directions, velocity, and distance measurements.

An example is Mên-an-Tol, Nr Penzance, Cornwall. The two vertical stones are 2° off from the opposite.
29° Northeast
Usable angles 31°-22.5°
33° South West
Usable angles 31°-24.5°

Possible purposes for the Mên-an-Tol stones has a number of different possibilities, (1) the stones align north east with the sunrise, the outer stone blocks the light just allowing the rays to shine through, (this is also possible facing south west but for sunset, these give two different dates) (2) furthest stone away from sunrise marks sunrise and the same applies in the other direction (again giving two dates) (3) sunlight variations through the year could be measured along with nearest and further distance, giving perihelion and aphelion (semi-major axis).

Current coordinates and angle at Penzance
50.158278,-5.604417, sunrise is 37°.
Current sunrise time (winter solstice 22nd December 2019) is 8.18am and sunset 4.22pm. Effective angle is -40° for sunrise at 8.18am and -40° for sunset at 4.22pm.

Current measurements
Azimuth sunrise 127.11° (37.11°)
Azimuth sunset 232.89° (142.89°)(52.89°) 

Towards north east
So 31°-37.11°=6.11°
Converting to date
6.11÷1.55=3.94
3.94×1000=3942
3942-1985=1957 bc

Towards south west
So 29°-37.11°=8.11°
Converting to date
8.11÷1.55=5.2322
5.2322×1000=5232.2
5232.2-1985=3247 bc

This aligns with sunrise for measurement, making it 6.11° off from construction and marks sunrise on the winter solstice. 
This would have been constructed in the bronze age with metal tools.
Paint might have been used to mark points on the disc as multiple measurements were taken. These would mark differences year on year. From here, perihelion and aphelion could be measured along with inclination to the Sun. Precession could also be measured as a variation of the length of a day throughout the year, requiring the two stones in opposite directions.

The measurements would be taken from the slope of the stones, and as they are tilted, this would effectively make them a pointer. The sloping stone outside of the group might align with the summer solstice sunset measured from the slightly buried stones.
Currently at +2° with the other buried stones being 8° and 18°. With the two slightly buried stones with the ring giving angles of 13° and 20° (but 11° and 7° with other buried stone).


This then suggests that they also took into account obliquity. (1985+1957)×0.000117=0.461214
23.437=2019
24.453−23.437=1.016°
6642 bc peak

The number 0.461214° is used for obliquity and added to 6.11° as obliquity is increasing, and it is also adjusted as 23.437° is for the year 2019. 
Adding the original angle gives the number 2227 as an error adjustment.

6.11°+0.461214°=6.571214
6.571214÷1.55=4.2395
4.2395×1000=4239.5
4239.5-1985=2255 bc

2254.5−34=2220
(From 2019)
2255-28=2227
(From 2013, which is 33.25 years from 2046 and connected to the cubit)
2220.5+6.571214=2227.06

This suggests that this could have been adjusted about the time of the building of Giza pyramids and possibly like other monuments a use of a Neolithic marker was used along with the circular ring (they would have crafted the circular ring).
The reason for this is from the number 2227.


So, if there is an astrological object, then the following would apply.

Currently angled at 31° and 0.461214° obliquity and 6.11° tilt, a 4.317° angle is produced as a vector.
Inside a triangle of angle 31° and 90° with the centre a 59° angle is produced, with a distance of 12368 kms, it would align with the surface and Earth's tilt of 23.5° at a distance of 48385 kms.


Denebola in the constellation Leo.
Right ascension 11h 49m 03.57834s
Declination +14° 34′ 19.4090

31-23.5=7.5°
and
7.5+6.11=13.61°


13.61+0.461214=14.071214
14.57206+0.1255637376=14.697
14.697−14.071214=0.6264

14.57206-14.071215=0.5°
Drift=0.1255637376°

Procyon in the constellation of Canis Minor.
Right ascension 07h 39m 18.11950s
Declination +05° 13′ 29.9552″

Drift=1.135296°

If the drift is added to the declination, an angle of 6.36° is produced
1.135296+5.225=6.36

7.5-6.36=1.14°



Conclusion
So two measurements can be made, which includes one at maximum tilt at an angle of 31° or when it was adjusted at 37.11°.
The two examples Denebola and Procyon show that these objects would have been perceived inside a 2° arc, 
Procyon in the constellation of Canis Minor has a comparable shape with the monument along with an angle difference of 20.5° from equatorial tilt (23.5°). Denebola, though, is connected with this angle, 20° maximum tilt and 0.5° difference from max tilt.

From the shape using Procyon as the ring and Beta Canis Minoris as one of the marker stones, this would give an angle of 14°, with 14.071214° being the angle used.
45°-31°=14°
This could suggest that not only could this monument be used to align these two stars, but it was also the stars Procyon and Beta Canis Minoris. Although it could be used for any star inside of this time.

There is also a small error induced from the stone measurements, which is possibly about 2%, giving a possible date of +/-50 years.



Prehistoric Monuments

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