April 2014


 

Moon                         


First Quarter                                     8th   12:43  --  02:42              
Full                                                     15th 20:34  --  06:05              
Last Quarter                                      22nd 02:29 --  12:02               
New                                                    29th  05:46 --  20:56              

 It's April now and I think we can say winter has passed, and a very mild one too, though very, very wet. Spring begins to look good too.


Planets

 Mercury isn't available this month, rising with the Sun in the mornings and setting before it in the evenings.
 
Venus rises as the Morning Star at about 5:30am on the 1st, as a mag -4.3/22 arcsec disc, 54% lit by the Sun, rising 70 mins later. It will retain the same timing with the Sun all month, about 7o mins ahead, but will reduce in size and brightness so by the end of the month it will present a mag -4.1/17 arcsec disc 66% lit.

This is the turn of Mars to shine. It will be its closest to Earth for a couple of years and present a mag -1.4/15 arcsec disc. It will rise on the 1st at 8:30pm as evening twilight is darkening the sky. It will reach it's maximum height of 30° at 2am and will set in lightening dawn twilight at 7am. It will be accompanied across the sky by Spica, 5° away and Arcturus to the north. On the 15th it will already be above the horizon as evening twilight starts and will make its way across the sky in the company of an almost full Moon 5° away, making observation that little bit worse. It will set at 6:00am in dawn twilight. By the end of the month its appearance will not have changed much, but this is the end of its close encounter with Earth, but Earth, on the inside track is pulling away so Mars will present a progressively smaller disc over the following year. Make the most of it with visual and photographic means.

Jupiter will already be 60° high in the south as twilight descends on the 1st of the month, a mag -2.3/38 arcsec disc, up there in Gemini. It will set at 3:30am, giving plenty of time for observation. All month it will already be high up as the evenings darkens, and will set progressively earlier till by month's end it will set at 2am, a mag -2.1/35 arcsec disc.

Saturn will present its mag 0.3/18 arcsec disc at 11:30pm on the 1st and will rise to its highest point of 20° in the south and will be overtaken by the dawn a couple of hours before it sets at 8:15am. On the 17th it will rise at10:15pm and set at 7:00am, again overtaken by twilight an hour earlier. It will be accompanied across the sky by a 1 day short of Full Moon 2° away, On the 30th it will rise at 9:15pm as the sky darkens, a slightly brighter and larger disc of mag 0.1.19 arcsec,  and will set at 6:15am, well after the Sun has risen over at the other side of the sky. Not a good month for Saturn.

On the 1st, Uranus will be almost in line with the Sun from where Earth is, just 1° away, so not available. On the 2nd it will be even closer, within half a degree, but of course it is on the far side of the Sun. On the 30th it will rise only half an hour before the Sun so will not be worth seeking this month.

Neptune will rise on the 1st at 6:00am and will immediately be invisible in the dawn. On the 12th it will rise with bright Venus just half a degree away, so it's tiny disc of mag 7.9/2 arcsec will be difficult to see against the glare of Venus. Venus moves on later in the month. On the 19th Neptune will rise at 4:45am and its small blue spot may be seen just before being extinguished be dawn. As a pointer to its position, Venus will be 7° to the left but the dawn twilight may be too bright for this tiny planet. On the 30th Neptune will rise at 4:00am in a much darker sky, but dawn will soon be upon it. The nearest star to it is mag 3.7 Lambda AQR, some 4° to the left.

Meteor Showers.

The only one of note peaking this month is the Lyrids, on the 22nd, boasting a Zenith Hourly Rate of 18 bright meteors. That amounts to a maximum of one every three minutes, but they aren't as predictable as that so it may still be worth the effort if you're already out and observing to keep an eye out for them. Their radiant is in Lyra of course, and that rises in the east just before dark. A half full Moon will rise at 2:30am some 50° below and shouldn't spoil things too much.

 Comets.

C/20123 R1 Lovejoy continues to fade and at mag 13.5 it isn't worth searching for with binoculars. By the end of the month it will be mag 14.2. Not much else, though C/2012 X1 LINEAR looked promising, it's a daytime comet and not visible against the glare of the Sun.