Tuesday, October 14, 2014
The Sky This Week - Thursday October 16 to Thursday October 23
The Last Quarter Moon is Thursday October 16. Apogee, when the Moon is furthest from Earth, is on the 18th.
Mercury is lost in the twilight.
Mars is easily seen in the western evening sky, setting around midnight. Mars was at opposition, when it is biggest and brightest, on the 9th of April, and is still readily distinguishable as the bright red/orange object above the western horizon in the early evening.
Mars is in the constellation of Sagittarius. Mars meets Comet C/2013 A1 Siding Spring on the 19th. Fom Australia the comet and Mars will be less than 18 arc minutes apart (less than a quarter of a finger-width apart). The comet will be closer to Mars tan the Earth is to the Moon at closest approach, and a bevy of spacecraft will be watching. Sadly, you need really serious telescopes to see the comet now, as it has faded substantially. An extensive observing guide with printable maps is here.
Saturn is in the early western evening sky, and was at opposition on June 11th. Saturn is visible in the early evening, setting a bit over two hours after sunset. Saturn is still high enough from twilight for decent telescopic observation for a short while, but the window for telescopic observation is closing fast.
Saturn is in Libra near the head of the constellation of the Scorpion and forms a battered line with Mars and Antares.
Comet C/2013 V5 has passed perihelion and is still surviving. It is visible in medium sized or larger telescopes (8" reflectors or larger). While it is in quite dark skies at the moment, it is still low to the horizon, and will become even more difficult as it fades and twilight encroaches.
Venus is lost in the glare of the Sun.
Jupiter rises higher in the morning twilight, and now is easy to see above the horizon before twilight. During the week Jupiter climbs higher and becomes easier to see as the brightest object above the north-eastern horizon.
On 18th October the crescent Moon is just above Jupiter.
Comet C/2012 K1 Panstarrs is rising higher in the morning sky. At the beginning of the week it should be visible in 10x50 binoculars as a fuzzy dot with a stubby tail. As the week goes on and the Moon wanes it should be easier to see. At magnitude 7 you will need to let your eyes adapt to darkness to see the comet clearly. On the 15th and 16th of October the comet is within binocular distance of the nice open cluster NGC 2467.
More detailed charts and a printable binocular map are here.
Morning sky on Monday October 22 looking north-east as seen from Adelaide at 3:00 am local daylight saving time in South Australia. The white starburst marks the position of the Orionid radiant. Similar views will be seen elsewhere at the equivalent local time (click to embiggen).
The Orionid Meteor shower peaks on the morning of October 22 in Australia, the radiant for the Orionids rises around 1 am on October 22, with the best meteor viewing being between 3:00 am and 5:00 am. You can expect to see roughly a meteor every 5 minutes or so under dark skies.
As the name suggest, the meteors will seem to originate just below Orion. Allow several minutes for your eyes to adjust to the darkness and be patient, it may take ages for a meteor to turn up, then you may see a few in a row.
You can use the Meteor Flux Estimator to predict the number of meteors you might see at your location. Choose 8 Orionids, and make sure the date is 2014 and you have DST on if you are in daylight saving zones.
There are lots of interesting things in the sky to view with a telescope. Especially with Mars and Saturn prominent in the early evening sky. If you don't have a telescope, now is a good time to visit one of your local astronomical societies open nights or the local planetariums.
Printable PDF maps of the Eastern sky at 10 pm AEST, Western sky at 10 pm AEST. For further details and more information on what's up in the sky, see Southern Skywatch.
Cloud cover predictions can be found at SkippySky.
Labels: weekly sky