
NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Yves Robin-Jouan
Date: 2013 Apr 22, 07:58 -0700
Dear Peter, Antoine and Greg,
I had no ephemerids within my hand when I wrote my last message.
"My" declination for ACRUX came from Wikipedia (!), but incidently at J2000 reference...
Taking 63� 10.5'S for ACRUX declination gives these new results :
DIPHDA+ACRUX+JUPITER: 25� 9.2' S 178�40.2' E at 17:12:17
DOP = 1.87 dispersion radius = 0.38 NM
25� 8.4' S 178�44.3'E when retrofitted at 17:00:00
DIPHDA to SUN (5 sights):25�27.9' S 176�51.4' E at 22:00:26
DOP = 1.43 dispersion radius = 1.85 NM
With 3 sights at 17:00:00 our figures are harmonized finally.
With 5 sights, dispersion is significant because of the long transport between Jupiter and Moon sights (94 NM, submitted to DR acuracy).
We are in good agreement for MOON+SUN position.
Thank you and Regards,
Yves
----------------------------------------------------------------
NavList message boards and member settings: www.fer3.com/NavList
Members may optionally receive posts by email.
To cancel email delivery, send a message to NoMail[at]fer3.com
----------------------------------------------------------------