The Modern Antiquarian Forum » Minor Standstill - October 2015 |
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bawn79 864 posts |
Jul 27, 2015, 19:09
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I'm trying to look at this from a practical point of view - to figure out if any local monuments may be aligned to the Minor Lunar Standstill. Using Wikipedia it calls out October as the month of the Minor Standstill and gives an azimuth of 124 degrees as where the full Moon will rise and 236 as where it will set. However I've just be checking on this http://www.timeanddate.com/moon/ireland/limerick?month=10&year=2015 and it gives the full moon rising in Oct locally at 72 degrees and setting at 285 degrees. Hopefully without melting my brain can anyone help explain where I'm going wrong here?
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tiompan 5758 posts |
Jul 27, 2015, 20:33
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bawn79 wrote: I'm trying to look at this from a practical point of view - to figure out if any local monuments may be aligned to the Minor Lunar Standstill. Using Wikipedia it calls out October as the month of the Minor Standstill and gives an azimuth of 124 degrees as where the full Moon will rise and 236 as where it will set. However I've just be checking on this http://www.timeanddate.com/moon/ireland/limerick?month=10&year=2015 and it gives the full moon rising in Oct locally at 72 degrees and setting at 285 degrees. Hopefully without melting my brain can anyone help explain where I'm going wrong here? The problem is that the minor standstill event is an extreme event and does not coincide with a full moon . Very often standstills not only don't coincide with a full moon ,they are not even seen as the moon is below the horizon . So it's two different events types of events taking place on different nights or in the case of some standstills ,days .
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bawn79 864 posts |
Jul 28, 2015, 10:59
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Thanks Tiompan - that makes sense. I suppose when is the technical Minor Standstill this year and when is the nearest to a full moon for observation purposes ie if you were going to head out to look at it when would you? (Hopefully I haven't missed it at this stage).
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tiompan 5758 posts |
Jul 28, 2015, 14:02
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bawn79 wrote: Thanks Tiompan - that makes sense. I suppose when is the technical Minor Standstill this year and when is the nearest to a full moon for observation purposes ie if you were going to head out to look at it when would you? (Hopefully I haven't missed it at this stage). Standstills are problematic for a variety of reasons but possibly the most awkward is actually seeing the extreme event , as it often taking place ,below the horizon , or in cloudy conditions or in daylight ,and probably worst of all in a phase that it is difficult to see on the horizon even when the other variables are optimal . Although there is one extreme event for each northerly and southerly minor limits the standstill is usually perceived as a period which also makes adds to the confusion ,i.e. both minor limits are almost reached for a period of months . Tonight the set at Limerick, depending on the horizon , looks to be at 236 degrees which is pretty close to close to the minor limit for 18 October .The October date is typical in that the moon will be difficult to see as it is a waxing crescent and therefore ideal experience for evaluating the real thing . Hope it stays clear for you .
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bawn79 864 posts |
Jul 28, 2015, 18:47
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tiompan wrote: bawn79 wrote: Thanks Tiompan - that makes sense. I suppose when is the technical Minor Standstill this year and when is the nearest to a full moon for observation purposes ie if you were going to head out to look at it when would you? (Hopefully I haven't missed it at this stage). Standstills are problematic for a variety of reasons but possibly the most awkward is actually seeing the extreme event , as it often taking place ,below the horizon , or in cloudy conditions or in daylight ,and probably worst of all in a phase that it is difficult to see on the horizon even when the other variables are optimal . Although there is one extreme event for each northerly and southerly minor limits the standstill is usually perceived as a period which also makes adds to the confusion ,i.e. both minor limits are almost reached for a period of months . Tonight the set at Limerick, depending on the horizon , looks to be at 236 degrees which is pretty close to close to the minor limit for 18 October .The October date is typical in that the moon will be difficult to see as it is a waxing crescent and therefore ideal experience for evaluating the real thing . Hope it stays clear for you . Thanks Tiompan - that's kinda what I figured that really it was about picking an event - ie as close to full moon as possible that was nearest to the 236 and 124 as possible.
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