HELENSBURGH ASTRONOMICAL SOCIETY
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night sky news -  july 2008

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Surveying the Sky This Month - Observers Notes
CURRENT MOON

Observing Notes

These sightings are for the middle of the month. There will be slight variations throughout the month.

Planets

Rises Sets Mag. Comment
Mercury 0350 2225 -1.0
Venus 0550 2225 -3.58
Mars 2318 1.89 in Leo to the west
Jupiter 2124 -2.29 in Sagittarius
Saturn 2330 1.3 in Leo to the west
Uranus 2324 1051 5.97 moving into Aquarius from Pisces
Neptune 2328 0759 7.85 in Capricornus

Comets

There are no observable comets this month.

Meteors

There are several sets worth looking for this month although they don't all peak in July. Look towards the appropriate constellation for the radiant.
Shower Period Peak ZHR
Capricornids Jul 10th - Aug 15th July 25th
Delta Aquarids July 15th - Aug 25th July 29th
Piscis Australids Jul 15th - Aug 20th July 31st
Iota Aquarids Jul 15th - Aug 25th August 6th
Perseids Jul 23rd - Aug 20th August 12th
Alpha Capricornids Jul 15th - Aug 25th August 2nd

Stars

Antares in Scorpio. Low down in the south at 1030. Magnitude 1.05. Distance 603 light years.
Vega in Lyra. Magnitude 0.0. Distance 25.3 light years Altair in Aquila. Magnitude 0.75. Distance 16.8 light years

Nebulae

The Lagoon nebula (M8) with a magnitude of 5.8 and the Trifid nebula (M20) with a magnitude of 8.6, both of which are in Sagittarius. Eagle nebula (M16) is close by. Note that the Lagoon nebula also contains a star cluster which makes it an interesting object. Under good seeing conditions it is a naked eye object, but greater detail of course will be seen with binoculars or a small telescope.

Clusters

The sky is rich in clusters this month and a few of the popular ones are:
M10, magnitude 6.6 in Ophiuchus,
M12 at magnitude 6.6 in Ophiuchus and
M14 also in Ophiuchus.
These globulars are observable with binoculars and greater detail can be picked out with telescope apertures of 50mm or more.
M55 in Sagittarius has a magnitude of 7. It is low down in the south and crosses the meridian at 0110 hours approximately.
An open cluster to observe is M11,called the Wild Duck cluster. It has a magnitude of 5.8 and can be seen with binoculars.



Galaxies

Few observable galaxies this month although you can try the Sculptor galaxy which has a magnitude of 7.1 and crosses the meridian at 0617 hours.



Asteroids

Look for Vesta in Cetus at magnitude 7.22. It rises at 0109 hours and crosses the meridian at 0752 hours. Pallas is in Eridanus at magnitude 9. It rises at 0323 hours.



Compiled by Andrew A. Leven

Other sources of Sky news and related information:

The times of occultations according to location may be determined at the International Occultation Timing Association (IOTA) web site

Comet Rendezvous Calendar
Jodrell Bank Night Sky Observing Podcasts
More meteor for this month info click here  and here(ed.)
What's Up in Universe Today(ed.)

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