# NavList:

## A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

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From: Bill B
Date: 2004 Oct 22, 17:37 -0500

```A follow up question to help me visualize relationships.

I could plot Hc against azimuth for several dates, but I am hoping the more
learned among you have a quick visual answer.

Assume a fixed position of N40, W 90.  If I were to plot Hc for Sun each
minute it would form an arc.

Now assume I do this on winter solstice, an equinox, and summer solstice.

I understand the Hc will shift by approx. 23d 26.4' along the y axis between
dates, and the the summer solstice arc will extent furthest out on the x
axis.

My question is, if I slid all three plots together, would the curves be
similar (again noting there will be areas missing in the equinox and winter
solstice plots)?

Thanks

Bill

```
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