Moon
New 8th 04:44 -- 21:11
First Quarter 16th 12:58 -- 00:35
Full 23rd 21:22 -- 04:48
Last Quarter 30th 00:19 -- 13:53
First Quarter 16th 12:58 -- 00:35
Full 23rd 21:22 -- 04:48
Last Quarter 30th 00:19 -- 13:53
Can we say that this is summer? Certainly much better than the last
few months, so maybe it is. Short light nights during which you can almost see
the Sun pass along just below the northern horizon to start lightening the sky
at 3am. Warmer that winter nights though, so some blessing. Watch out for Noctilucent
Clouds in the north.
Planets
Mercury and Venus have now passed over to the other side of the Sun
so are no longer morning objects and are now available in the evenings instead.
Jupiter and Saturn remain on the evening
side of the Sun, as before. Mars, Uranus and Neptune stay on the morning side
so must be observed then.
Mercury will be easy to see on the 1st, as it follows the Sun into
the west, more than an hour and a half later. It will be mag -0.3, 7 arcsec and
show a 60% phase. Worth a look. Long focal length Photograph? A week later it's
position relative to the Sun is the same but it is approaching the Earth as it
rounds the Sun, so is a bit larger, 8 arcsec, and dimmer, mag +0.3, because
it's phase is 45%. Another week later, 15th, it's mag +0.8, 9 arcsec and
showing a phase of 32%. On the 22nd it will be closer to the Sun so be more
careful with optical aids. It will be mag +1.6, 10 arcsec and have a 20% phase.
After that it's too close to the Sun for observing, but if you could, on the
30th it would be mag +3, 11 arcsec and show a 7% phase!
Mercury, Venus and Jupiter will welcome the month with the three
setting in company soon after the Sun, but far enough away to give good
photographic opportunities. But Jupiter will soon leave the field to Mercury
and Venus as it runs fast towards a position behind the Sun. Mercury and Venus
can be followed for half the month, joined on the 10th by a thin
crescent Moon, 7° away, all unfortunately in the horizon’s murkiness.
Venus is there with Mercury, following the Sun down in the west, and
can be seen for over an hour after sunset. It will have a bright mag -3.9, 10
arcsec disc. It's on the far side of the Sun so won't change phase much. It
will continue to be available all month as the Evening Star.
Mars is on the morning side of the Sun but as it rises only half an
hour before the Sun, its 4 arcsec, mag +1.4 disc will be difficult to see in
the dawn twilight. It may be easier at the end of the month when it will rise
an hour before the Sun, when it's brightness will have not changed.
Jupiter passed behind the Sun during this month, changing from an
evening object to a morning one. On the 1st it will set just under an hour
after the Sun, but it's mag -1.9 disc should be easy enough to see, but too low
for much detail to be seen. A week later and it will set only 20 mins after the
Sun so beware. On the 30th of the month it will be rising, on the other side of
the sky, 20 mins before the Sun, again unsafe. So we've virtually lost Jupiter
this month, and will have to be satisfied with Saturn.
Saturn will be available due south as darkness falls on the 1st, a
mag +0.3, 18 arcsec disc, with handles as Galileo thought. It will set about
3:30am in dawn twilight. At the end of the month it will still be there at
dusk, though it will be further west than south and will set at 1:40am. Much of
its less than good display is due to the shortness and brightness of the
English summer sky, and to its low altitude.
Uranus is a morning object rising 2 hours before the Sun on the 1st
at 2:50am, so should be easy to see if you know where its mag -5.9 and 3 arcsec
disc can be found. It will be in Pisces, and will look like any other star. The
half Moon will be 26° further west. On
the 3rd, the Moon, slimmer now, will be 3° directly above it at 4:30am.
Unfortunately all the nearby stars are of similar magnitudes. But it will be
blue, so you may have to examine each. The only other way is to use a well set
up goto telescope. On the 30th it will rise at 1:00am
Neptune is similarly difficult. A morning object too, rising 3 hours
before the Sun at 2am, and smaller at mag +7.9 and 2 arcsec. On the 1st it will
be 41° to the west of the Moon. Again
little in the way of easily recognisable objects nearby. Again it's blue so you
may be reduced to examining all nearby stars, or have to use a well set up goto
telescope. Binoculars are unlikely to be able to tell you which of the spots
you see is the planet. Its position won't change during the month except that
it will rise at midnight.
Meteor Showers
Several very small showers, the only one with more than 20/hour is
the Arietids with the Radiant below the Pleiades, in Aries, with the peak on the 7th. But the peak is in
daytime so it's quite narrow spread will likely have been reduced to very
little by the time the bright summer night descends.
Comets
The local hero, C/2011 L4 Panstarrs,
is still there in Ursa Minor, making its way towards Kochab, which it
encounters on the 18th, and beyond. It will continue to reduce in brightness
from mag +9.5 on the 1st to +10.9 on the 30th. That's the forecast, but comets
are delicate and could split up as many have done, so still worth watching and
photographing. There are many others in the sky, but none of enough brightness
to be worth special study other than the one supposedly going to be the best
this century. Newspaper hype. It's C/2012 S1 ISON, and it's in Gemini on
Castor's leg on the 1st, at mag +14.6. By the 30th it will be approaching
Pollux's chest at mag +14.0, so getting nearer.