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Moon position 400 years ago

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15 years 4 weeks ago #78326 by Edk
Moon position 400 years ago was created by Edk
Hi Ed here,

I'm creating a piece of art which based on a date in the past. ( 11th April 1609) and the moon is part of the piece.

I have been doing some on-line research and have come up with an Altitude and Azimuth readings for the moon on this date in 2009 and am wondering how accurate these readings would be for the same time in 1609.

The readings are based on my location being Lat 52.651864. Long. -7.250289

The site was www.dailymoonposition.com

If anyone could help me on this I would be really greatfull. I have a couple of projects in mind that will involve location and time specific astrnomic observations. after reading some of the form articles, I have alot to learn but am looking forward to making first step!

Hopefull

Ed

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15 years 4 weeks ago #78327 by dmcdona
Replied by dmcdona on topic Re:Moon position 400 years ago
Below is data for the moon's position at 21:00 on April 11 1609 based on your decimal co-ordinates. Note that the equatorial co-ordinates are given for Epoch "now" and Epoch 2000 - I'm not sure if there would be a significant difference in the precise position of the moon back in 1609 by using current Epoch data...

Hope it helps

Dave


Object name: Moon
Equatorial: RA: 08h 08m 07s Dec: +19°22'28"(current)
Equatorial 2000: RA: 08h 30m 33s Dec: +18°07'54"
Horizon: Azim: 220°54'32" Alt: +51°09'54"
Visibility: Rise 11:01, Set 02:37
Transit time: 19:13
Phase (%): 57.25
RA rate (arcsecs/sec): 0.4269
Dec rate (arcsecs/sec): -0.0904
Ecliptic: l: 120°09'15"b: 00°12'55"r:
Moon parallax: 0.9419
Moon angular diameter: 00°30'48"
Moon distance (km): 388009.00
Moon true RA: 8.1529
Moon true Dec: 19.9062
Moon topocentric ang. diameter: 0.5199
Moon altitude w/refraction: 51.1782
Moon optical libration: l: 7.2925 b: 0.2657
Moon physical libration: l: -0.0162 b: -0.0128
Moon total libration: l: 7.2763 b: 0.2529
Moon position angle: 13.8094
Moon phase angle: 81.6587
Moon position angle of bright limb: 282.2381

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15 years 4 weeks ago #78329 by calchas
Replied by calchas on topic Re:Moon position 400 years ago
Ed

If you download Stellarium. You can set your position and then set the time and date to any you wish. How precise it is in the past is not clear though.

Steve

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15 years 4 weeks ago #78342 by dave_lillis
Replied by dave_lillis on topic Re:Moon position 400 years ago
Can we ask out of curiosity, what happened on Apr11 1609 ?

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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15 years 4 weeks ago #78343 by dave_lillis
Replied by dave_lillis on topic Re:Moon position 400 years ago
oh wait, is that when Galileo invented the astro telescope. ?

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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15 years 4 weeks ago #78354 by Edk
Replied by Edk on topic Re:Moon position 400 years ago
Hi.

Sorry I should have said.

Kilkenny was constituted as a City by a Royal Charter of James 1 on April 11 1609,

Ed

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