BarbarianB's Navigational - Southern Planisphere 2008 (Functional)
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Owner:
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BarbarianB
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Released:
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Saturday, June 21, 2008
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Origin:
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Ohio, United States
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Recently Spotted:
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In the hands of the owner.
This is not collectible.
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Southern
Planisphere
2008 Version
(Functional)
Finishes:
Outer Casing:
- Polished Nickel
Star Disk:
- Polished Gold
Default Name:
Southern Planisphere Geocoin
This is a functional Planisphere Geocoin, which can actually be used to locate constellations.
See instructions below ↓ ↓ ↓ ↓
Planisphere Wikipedia page
Note:
This is the 2008 Version of the Southern Planisphere geocoin. The Reverse features a more basic design with a line image of a globe surrounded by stars.
The Reverse of the later versions feature a star map of several constellations on top of their corresponding animal, mythological person or creature.
Planispheres are maps of the celestial stars as seen from earth. They are the replacement for the planispheric astrolabe. The first star chart to be called a planisphere was created in 1624. Planispheres are great for learning the constellations and knowing the exact position of the stars at a particular time to get more accurate readings when used with other navigational tools such as the quadrant, nocturnal, astrolabe, back staff, and sextant.
One disadvantage of translating stars from an actual spherical view to a flat disk is the distortion caused to the constellations towards the edge of the disk. It causes the images towards the edge of the disk to become stretched out. However, with some practice you will become a pro with this device in no time and be able to compensate for this distortion.
Normally, planispheres consist of several disks which map the stars as viewed from different latitudes and for different seasons. The planisphere geocoins we have made do not have interchangeable disks; however, they still give you a good idea of where the stars are at any time of day, and provide you with a pocket sized tool to help learn the constellations. Its 3.25" diameter size makes it portable, and being made out of metal makes it very durable.
How to use it:
1. Align the planisphere coin so the correct horizon name matches with the horizon you are viewing. For example: if you are looking at the northern horizon, hold the coin upside down so the name "North" meets downward with the actual northern horizon. If you are looking east, hold the coin on its side so the name "East" meets with the actual eastern horizon. The example below shows the coin rotated to match with the western horizon.
2. Rotate the disk to match with the current day and hour.
3. Look at both the disk and actual sky and start correlating the constellations on the planisphere with the stars in the sky. Click on constellations to see what each abbreviation on the coin means.
The Planisphere Geocoin™ is set for standard daylight time. A factor that will need to be taken into consideration is any shift in time such as if one lives in a region which observes daylight savings time. In that case, the rotating disk will need to be offset by one hour during the daylight savings period.
Northern Planisphere Later Version After 2008
Antique Phillips' Planisphere, Early 1900's
Antique Der Sternenhimmel Planisphere, Approximately 1915
Gallery Images related to BarbarianB's Navigational - Southern Planisphere 2008 (Functional)
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Tracking History (505.5mi) View Map