NavList:

   

Reply

thank you



----- Original Message ----
From: Nicol�s de Hilster 
To: NavList@fer3.com
Sent: Tuesday, March 3, 2009 1:43:09 AM
Subject: [NavList 7532] Re: Can be of interest


inuik@yahoo.com wrote:
> I think it can be of interest
>
> During Willem Barents's third voyage to the North and the wintering on 
Novaya Zemlya (1596-97), many astronomical observations were made. Solar 
declinations quoted in the diary of Gerrit de Veer indicate that the journal 
dates are correct within three days and that the Gregorian calendar was used 
throughout. The much-debated premature return of the sun on 24 January 1597, 
when it was geometrically below the horizon, fits many, but not all, of the 
characteristics of the arctic mirage that is now known as the Novaya Zemlya 
effect. This same effect might also explain the controversial report of a 
conjunction of Jupiter and the moon on 25 January 1597, when Jupiter would 
normally not have been visible. It is shown, however, that the occurrence of 
the conjunction during that night could have been concluded from following 
the positions of the moon and Jupiter for several hours. An analysis of 
latitude determinations made at the expedition's wintering place,
 Het Behouden Huys, indicates that typical measurements had an accuracy of 
15'-20'. In the Novaya Zemlya region, the variation of the earth's magnetic 
field was about 30W 400 years ago, and about 23E in 1871, and it is about 32E 
today. During the return voyage in two open boats,Barents died on 20 June 
1597. 
>
>� 
In this respect we had an interesting discussion here on NavList in 
December 2007. If you follow the 'Refraction' thread as from [NavList 
4287] you will find the so called Toboggan effect fully explained, 
including graphs of the Jupiter/Moon conjunction and reference to two 
articles explaining the observations made in 1597.

Nicol�s





      

--~--~---------~--~----~------------~-------~--~----~
Navigation List archive: www.fer3.com/arc
To post, email NavList@fer3.com
To , email NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---

   

Reply