Reminder, with added cities, Occultation of Saturn by the Moon 4 August, 2014
Just a reminder that on the evening of Monday 4 August Saturn is occulted by the Moon as seen from the most of Australia. This is the third and best of these rare occultations, it is under reasonable dark skies, with Saturn slipping behind the dark limb of the Last Quarter Moon. Saturn reappears while the Moon is still reasonably high. See here and here for images of the May 14 occulation.
The occultation occurs in the early evening with the Moon will be reasonably high above the north west horizon, a good time to show the kids this event (see below for a table of times). The Moon easily visible and a ready signpost to Saturn.
The images above show the location of Saturn as it goes behind, then exits the Moon at some representative sites. Basically, the further North you are, the further towards the Moons north pole Saturn enters and exits.
Of course, if you don’t readly know where the north pole is, this is confusing. Basically the north pole of the Moon is where all the dark “seas” are that make the face of “the Man in the Moon”, the south pole is the bright end.
Saturn slowly slides behind the Moon as seen from Warrnambool at 20:56 AEST.
While everywhere except Tasmania sees Saturn go behind the Moon (Tasmanians get to see Titan scrape along the edge of the Moon which will be cool too), the most dramatic views will be in Southern Victoria, where the Moon slides along the edge of the Moon before vanishing, then reappears sliding from behind the lighted side of the Moon.
Although this event is easily seen with the unaided eye, it is best seen in a small telescope so you can see the ringed world in detail as it vanishes behind the Moon. Saturn’s moon Titan will be occulted before Saturn, so you can see the Moon occult a moon.
SkippySky predictions for cloud tomorrow around occulattion time, it is best to check closer to the event if you are intending to travel.
Weather is looking good for most of Australia, except Tasmania and perhaps Darwin.
If you are just watching with the unaided eye, Keep a close watch on the bright point that is Saturn above the Moon, you will see it suddenly “wink out” as it goes behind the dark edge of the Moon. It will be harder to see Saturn reappear from the bright side, but if you watch carefully you can see it slowly reappear.
In binoculars Saturn is a featureless oval, but it is big enough that you can see it slide behind the Moon rather than abruptly disappear. If you have a way to attach your binoculars to a tripod, this will make observing very easy. If not, use the back of a chair or some similar object to stabilise the binoculars, so that the image is not continuously swinging around.
Start watching about half an hour before hand to get set up and familiar with the sky, earlier if you need to set up at telescope and get it aligned properly. This way you can watch the entire event comfortably (trying to focus your telescope on Saturn moments before the occultation will cause a lot of unnecessary stress). It is advisable to set up and practise on the Moon a day or so before the event, so you are familiar with your telescope set-up. Tonight is a good time to practise with Mars close to the Moon.
The Moon is in its First Quarter phase, and it will be easier to see Saturn as the glare of the Moon will not be so intense. On the other hand picking up precisely when Saturn is about to reach the dark edge of the Moon will be harder.
Timings for major cities are shown below, nearby towns will have similar timing.
Place | Disappears Dark Limb | Reappears Bright Limb |
Adelaide ACST | 20:33 | 21:28 |
Alice Springs ACST | 20:10 | 21:40 |
Brisbane AEST | 21:19 | 22:27 |
Canberra AEST | 21:22 | 22:07 |
Cairns AEST | 21:12 | 22:28 |
Darwin ACST | 20:05 | 21:19 |
Hobart AEST | 21:35 (graze of Titan) | - |
Melbourne AEST | 21:24 | 21:52 |
Perth AWST | 18:15 | 19:17 |
Rockhampton AEST | 21:15 | 22:31 |
Townsville AEST | 21:11 | 22:28 |
Sydney AEST | 21:22 | 22:13 |
Source: http://astroblogger.blogspot.com/2014/08/reminder-with-added-cities-occultation.html
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