A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Ron Jones
Date: 2018 Oct 13, 21:15 -0700
Tony Oz wrote
Our navigator also posesses a TI-83+ calculator using which with the above data he finds the following approximating functions (QuadReg function):
- for Deneb's HC: 0.13199529·x2 + 4.154611098·x -25.42931898
- for Capella's HC: 0.709664195·x2 - 19.42687497·x + 149.3005809
He then substitutes the 12:30 as x in both equations and gets:
- Deneb's HCat 12:30 is 47°00'12"
- Capella's HC at 12:30 is 17°20'59"
Using the Hc values tony supplied & using 2nd order regression for the data I get the Hc of deneb as 47deg 0.6' & Hc of Capella as 17deg 21.0' with a 2 body fix position of Lat 60 deg 6.2'N Lon 30deg 6.9'E
Using the Hc values tony supplied & using 1st order regression for the data I get the Hc of deneb as 47deg 1.4' & Hc of Capella as 17deg 26.5' with a 2 body fix position of Lat 60 deg 11.8'N Lon 30deg 5.9'E
see Attached PDFs
Ron 48N 123W