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Tuesday, August 06, 2019

 

Occultation of Saturn, Monday, 12 August 2019.

The Moon at 18:08pm AEST in Brisbane on Thursday 12 August just as Titan disappears. The left inset shows the telescopic view as Titan  disappears behind the Moon and the right-hand as Saturn reappears at 19:34 AEST (click to embiggen).The Moon at 19:13pm AEST in Cairns on Thursday 12 August just as Saturn reappears (click to embiggen). Saturn disappears in the twilight and will be difficult to view even telescopicallyThe Moon at 18:32pm AEST in Canberra on Thursday 12 August just as Titan disappears. The left inset shows the telescopic view as Titan  disappears behind the Moon and the right-hand as Saturn reappears at 19:13 AEST (click to embiggen).

On the evening of Monday 12 August Saturn is occulted by the waxing Moon as seen from eastern Australia north of Canberra.

Although the east coast gets a good look, the best views are from New Zealand and Polynesia, everyone else misses out.

The Moon, above the eastern horizon, is a very obvious signpost for where to look. From most locations the occultation starts between nautical and astronomical twilight, although Saturn may be harder to spot visually it should be readily visible in telescopes and binoculars.

 In some locations the Moon titan is occulted first, but will be much harder to see in the twilight (Brisbane 18:08, Canberra 18:32, Sydney, 18:25). For timings of Titan disappearances and Saturn grazes from NZ and Australia, see here.

The Moon at 18:15 pm AEST in Adelaide (about 45 minutes after sunset) on Thursday 12 August as Saturn is closest to the Moon, twilight will make seeing Saturn more challenging. (click to embiggen).

In the rest of Australia the Moon and Saturn will be very close. In southern Australia the Moon and Saturn will be visible together in telescopic eyepieces. Albury and Merimbula should see Saturn graze the edge of the Moon.

Start watching about half an hour beforehand to get set up and familiar with the sky. Saturn will disappear behind the dark limb of the Moon at a reasonable height for telescopic observation.

Reappearance will be harder to see as you have to be looking just at the right moment.


PlaceDisappears Dark LimbReappears Bright Limb
Adelaide ACST- -
Brisbane AEST18:1619:43
Carins AEST-twilight19:13
Canberra AEST18:4119:13
Darwin ACST--
Hobart AEST--
Melbourne AEST- -
Perth AWST--
Sydney AEST18:35 19:23
Rockhampton AEST18:0619:28
Townsville AEST- twilight19:17


More cities in Australia and New Zealand cities can be found at the IOTA site (UT times only).

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