#astronomy Monitor down post-sunset Mercury – Astronomy Now

January 25, 2021 - Comment

Mercury places in a good look within the night sky. That is the view to the south-west quickly after sundown on 24 January, when it’s at best jap elongation from the Solar. AN Graphic by Greg Smye-Rumsby. Mercury is seen this night quickly after sundown, having reached best elongation east (18.6 levels) from the Solar.



Mercury places in a good look within the night sky. That is the view to the south-west quickly after sundown on 24 January, when it’s at best jap elongation from the Solar. AN Graphic by Greg Smye-Rumsby.

Mercury is seen this night quickly after sundown, having reached best elongation east (18.6 levels) from the Solar. Though this isn’t the innermost planet’s most beneficial night apparition throughout 2021 – we’ll have to attend till Could for that – the planet places on fairly a great displaying within the south-western sky. (Mercury’s finest morning apparition of the 12 months for the UK takes place in October.) Mercury by no means strays too removed from the Solar’s area, so there’s a great sense of accomplishment when you’ll be able to monitor it down.

As at each beneficial night apparition of Mercury, you’ll want to trace down an observing web site with a fairly unobstructed view in direction of the south-west. Mercury may be discovered at an altitude of round 13 levels above the horizon at sundown from London (which happens at about four.35pm GMT), and shines at a comparatively vivid magnitude –zero.5. Bear in mind, don’t sweep the sundown horizon (or certainly at dawn) with binoculars or a telescope till you might be completely positive that the Solar has set out of your location.

Mercury as seen on the night of seven April 2010. This part of round 45 per cent carefully mimics that which will likely be on present. Sketch: Peter Grego.

In a clear sky it is best to spot Mercury; for those who can view proper all the way down to the horizon, don’t mistake Mercury for brighter Jupiter, which lies 5 levels under. A pair of 10×50 binoculars ought to simply snare Mercury, although it seems merely as an off-white star. If you’ll be able to view the planet via a telescope, then it’ll present a 52.7 per cent-illuminated disc, just like the Moon at simply previous first quarter. Mercury stays on present for the remainder of the month, fading to magnitude +1.zero by the top of January, because it looses a few levels in altitude for a similar diploma of twilight.



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