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Re: Exercise Lunar Distance with Mercury
From: Peter Hakel
Date: 2009 Sep 19, 16:34 -0700
Local Time: Ds Cleared LD
18h 45m 42s 41 deg 5.7' 41 deg 53.9'
18h 46m 36s 41 deg 6.3' 41 deg 54.4'
18h 47m 15s 41 deg 6.1' 41 deg 54.8'
18h 48m 00s 41 deg 6.8' 41 deg 55.1'
18h 48m 42s 41 deg 7.0' 41 deg 55.5'
The Moon semidiameter was 15.4'. The LD's are increasing with time and this trend (with the exception of the third data point at 18:47:15) is also seen in your observations.
Peter Hakel
From: "Anabasis75@aol.com" <Anabasis75@aol.com>
To: NavList@fer3.com
Sent: Saturday, September 19, 2009 3:08:53 PM
Subject: [NavList 9807] Exercise Lunar Distance with Mercury
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From: Peter Hakel
Date: 2009 Sep 19, 16:34 -0700
Jeremy,
I assume that you were interested in "Moon center - Mercury" distances computed from the respective GPs. These results are in the added third column:
I assume that you were interested in "Moon center - Mercury" distances computed from the respective GPs. These results are in the added third column:
Local Time: Ds Cleared LD
18h 45m 42s 41 deg 5.7' 41 deg 53.9'
18h 46m 36s 41 deg 6.3' 41 deg 54.4'
18h 47m 15s 41 deg 6.1' 41 deg 54.8'
18h 48m 00s 41 deg 6.8' 41 deg 55.1'
18h 48m 42s 41 deg 7.0' 41 deg 55.5'
The Moon semidiameter was 15.4'. The LD's are increasing with time and this trend (with the exception of the third data point at 18:47:15) is also seen in your observations.
Peter Hakel
From: "Anabasis75@aol.com" <Anabasis75@aol.com>
To: NavList@fer3.com
Sent: Saturday, September 19, 2009 3:08:53 PM
Subject: [NavList 9807] Exercise Lunar Distance with Mercury
I must thank everyone who provided data for me to solve this
one. I got a sight error of 0.2' which isn't too bad.
A ship is sailing in the Southern Seas and observes a lunar
distance between the near limb of the moon and the planet Mercury.
distance between the near limb of the moon and the planet Mercury.
Lat 36 deg 31'S
Long 26 Deg 20.8'E
Crs 246 Spd 15.5 Kts
Long 26 Deg 20.8'E
Crs 246 Spd 15.5 Kts
Index correction is -0.8'
ZD -2
Date 25 August 2009
ZD -2
Date 25 August 2009
The following data was taken for the lunar
Local Time: Ds
18h 45m 42s 41 deg 5.7'
18h 46m 36s 41 deg 6.3'
18h 47m 15s 41 deg 6.1'
18h 48m 00s 41 deg 6.8'
18h 48m 42s 41 deg 7.0'
18h 45m 42s 41 deg 5.7'
18h 46m 36s 41 deg 6.3'
18h 47m 15s 41 deg 6.1'
18h 48m 00s 41 deg 6.8'
18h 48m 42s 41 deg 7.0'
Clear the Lunar Distance
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