| my account | login-logout | resources | classroom help | support | catalog | home | get webcard |

Online Classroom


Post New Topic  Post A Reply
search | help desk | commons
  next oldest topic   next newest topic
» Online Classroom   »   » Public Discussion of Cel Nav   » Ex. 9.8 - Moon-Arcturus Fix, Star #9

   
Author Topic: Ex. 9.8 - Moon-Arcturus Fix, Star #9
Rich A


 - posted August 11, 2016 08:41 PM      Profile for Rich A           Edit/Delete Post 
The Ha is 9 deg 21 min. The chart for altitude correction does not have a listing for anything below 9 deg 56 min.

The stated answer (pg 239) for alt corr is - 5.9 min.

How do you find this altitude correction?

Rich

From: Lacey
David Burch


 - posted August 17, 2016 09:43 AM      Profile for David Burch           Edit/Delete Post 
I apologize. We missed this question. Back to you shortly with an answer.
From: Starpath, Seattle, WA
Rich A


 - posted August 17, 2016 09:49 AM      Profile for Rich A           Edit/Delete Post 
Thanks .. I have been stuck for a week and pulling my hair out thinking I missed something simple (which I hope I didn't)

Rich

From: Lacey
David Burch


 - posted August 17, 2016 09:55 AM      Profile for David Burch           Edit/Delete Post 
We do not include those low Ha corrections because in principle we should try to avoid sights that low, but it seems this one slipped in. You can get a copy of the corrections here http://www.starpath.com/cgi-bin/web_card/res.pl?fn=/celestial/82_na_selections.pdf

which is from our online Resources, under Miscellaneous. However, when you do check that please note the Ha minutes are 2.1' not 21', which changes this correction by 0.2'... ie this sensitivity is part of the reason we try to avoid sights lower than about 15º when possible.

From: Starpath, Seattle, WA
David Burch


 - posted August 17, 2016 10:01 AM      Profile for David Burch           Edit/Delete Post 
Moving forward, if you do not hear from us within 48h of posting, then please call us 206-783-1414 or send an email to helpdesk@starpath.com

When we do not answer within that time frame, as in this case, i am sorry to say, it means we missed the question.

From: Starpath, Seattle, WA
Rich A


 - posted August 17, 2016 10:01 AM      Profile for Rich A           Edit/Delete Post 
right - thank you .. and I had 2.1 on my worksheet, just transposed it wrong here .. I will look up that link and continue on

Rich

From: Lacey


All times are Pacific  
Post New Topic  Post A Reply Close Topic    Move Topic    Delete Topic next oldest topic   next newest topic
Hop To:

Starpath School of Navigation

Copyright, 2003-2018, Starpath Corporation

Powered by Infopop Corporation
UBB.classicTM 6.3.1.1