Mariner's Astrolabe Geocoin JohnnyM.'s Astrolabe Geocoin

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Owner:
JohnnyM. Send Message to Owner Message this owner
Released:
Monday, February 2, 2009
Origin:
Czechia
Recently Spotted:
In the hands of the owner.

This is collectible.

Use TB2V1D6 to reference this item.

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Current Goal

To be in small collection of my owner.
I want to travel from event to event with my owner.
You can see me in the hands of JohnnyM. mostly stays in Prague (Czech Republic).

About This Item

astrolabe


How to use me:

Taking a latitude reading from the North Star, Polaris:
  1. Grasping the ring, hold the astrolabe up in the air towards the North Star.


  2. Line up the holes in the spinning alidade so that you can see Polaris through them.


  3. Take the reading from the degree scale and you now have your latitude.


Measuring the declination of the sun:
  1. Grasping the top ring, hold the astrolabe to about chest high.


  2. Looking down on the alidade, let the sun shine directly though the upper alidade hole.


  3. Adjust the alidade so that the beam of sunlight shinning through the upper hole passes through the lower hole. The picture below shows how the light and shadow from the upper alidade look when slightly misaligned with the lower alidade hole.


  4. Now you can take a reading from the degree scale and see the declination of the sun. In this example, the degree scale shows the sun is at 11 degrees. These example photographs show the angle of the sun during the evening to give better contrast of the sunlight passing though the hole. When using the Mariner's Astrolabe Geocoin™ for navigation, you will want to take a reading at high noon.

Gallery Images related to JohnnyM.'s Astrolabe Geocoin

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Tracking History (474.7mi) View Map

Discovered It 6/13/2009 Paullow discovered it   Visit Log

Videno na eventu na hrade Houska.
Díky
Discovered It 6/13/2009 jokry discovered it   Visit Log

Nádherný GC spatren na eventu S hradnikem na hrad #1- Houska. Dekujeme ownerovi.
Dropped Off 6/10/2009 JohnnyM. placed it in S hradnikem na hrad #1 - Houska Liberecký kraj, Czechia - 162.06 miles  Visit Log
Retrieve It from a Cache 6/6/2009 JohnnyM. retrieved it from Valašské keškobraní 2009 Zlínský kraj, Czechia   Visit Log

Tak VK09 skoncilo a tak rychle zpet abychom mohli dorazit na Housku. Škoda, že nebylo více casu na ukázání, ale po získání 16. místa jsme všichni v týmu LePich meli myšlenky akorát tak na odpocinek.
Dropped Off 6/4/2009 JohnnyM. placed it in Valašské keškobraní 2009 Zlínský kraj, Czechia - 171.93 miles  Visit Log
Discovered It 4/22/2009 slunickojan discovered it   Visit Log

Prohlednuto na Cito eventu v Zelezné. Parádní sbírka. Díky
Retrieve It from a Cache 4/21/2009 JohnnyM. retrieved it from GeoSazeni u Berouna Středočeský kraj, Czechia   Visit Log

Behem geosázení jsme si užili spoustu legrace, škoda že už je konec. Takže zase honem zpátky domu.

Discovered It 4/20/2009 Fr.Ga.L. discovered it   Visit Log

tak takovyhle kousek jsem jeste jinde nevidel byl opravdu hezky a dekuji ze jsem ho mohl vydet.vyden na geosazeni u berouna
Discovered It 4/20/2009 petrz discovered it   Visit Log

To je parádní kousek. Konecne jsem ho videl na vlastní oci. Mám pro tyto astro vecicky slabost.

  • Astrolabe GC
Discovered It 4/19/2009 Bezi33 discovered it   Visit Log

Videno na eventu geosazeni u Berouna diky.
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