Two Parts of Volvelle Inovasi That We Must Know !

Volvelle Inovasi is a new astronomical instrument specified for eclipse calculation (prediction). Developed in Indonesia, 2019 and became the first eclipse instrument in this country. Volvelle Inovasi offers an easy calculation for solar and lunar eclipse. All user just need two operations on Volvelle until they get all data about eclipses in a one year calendar. But, due to this eclipse astronomical instrument is rare and new, then this two parts of Volvelle Inovasi is very important to understand.

Volvelle Inovasi is an eclipse astronomical instrument.

1. THE TAB / POINTER

The first part of Volvelle that we must know is the tab. What the meaning of TAB???. The tab is a part like alidade located on the edge of epoch disc. We can also call it with a pointer, because its function is to point out some numbers in other disc. The tab will become start code of volvelle calculation because the circle hole on this area is the first full moon in every lunar year. The first circle hole showed is the circle that its center intersects with the straight edge of the tab. We can see it in this picture above.



For example. Move the tab of epoch disc to lun number (015) on the division disc. Then, we must ensure that the straight edge of the tab points out to number 015. This step is the first operation on Volvelle Inovasi and then users still need one operation to finish it.

Every Lun number has a black line and user must ensure that between the edge of the tab and the center of the black line is in straight position.

From the above example. We see the edge of the tab is in the same positions with number 015. And this is the right setup.

Read this article : Volvelle Inovasi Basic, Instrumen Penentu Waktu Gerhana yang Mudah dan Cepat

2. THE EPOCH DATA

The second part of volvelle that we must know is epoch data. Epoch data in this instrument are some numbers of the full moon in every year. This data functioned to help the user for predicting the eclipses in one year desired. Epoch data consists of six components; Lun (full moon code in every first lunar year), Sol (Solar Calendar), Mois (month of the full moon), J (Jour /day), H (Houres / hour), and M (minutes of the full moon). Every user will find this data on the top of epoch disc.

Every user will use this data to predict the eclipses on the year desired. And with this data, the user can predict the solar and lunar eclipse from 2022 until 2195 AD.

For example. We want to predict the eclipse on 2028. Then, we can search it on the epoch disc and finally find it in line 7th. These datas are Lun (1), Sol (2028), Mois (Juin), J (22), HM (09:02) GMT.

So, we get the epoch data for 2028 AD. In this step, we are ready to act for eclipse calculation with this volvelle.

If you want to download all epoch data : link

Some pictures of the tab of volvelle inovasi

Volvelle Inovasi Basic

Volvelle Inovasi SSE

Volvelle Inovasi SLE

Volvelle Inovasi Koreksi

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