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Close approach of the Moon and Venus

Dominic Ford, Editor
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The sky at

The Moon and Venus will make a close approach, passing within 2°35' of each other. The Moon will be 27 days old.

From Cambridge, the pair will be visible in the dawn sky, rising at 03:46 (EDT) – 2 hours and 32 minutes before the Sun – and reaching an altitude of 23° above the eastern horizon before fading from view as dawn breaks around 05:59.

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The Moon will be at mag -9.8; and Venus will be at mag -4.5. Both objects will lie in the constellation Cancer.

They will be too widely separated to fit within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars.

At around the same time, the pair will also share the same right ascension – called a conjunction.

A graph of the angular separation between the Moon and Venus around the time of closest approach is available here.

The positions of the pair at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 09h02m30s +12°51' Cancer -9.8 29'47"9
Venus 09h00m00s +10°20' Cancer -4.5 45"1

The coordinates above are given in J2000.0. The pair will be at an angular separation of 32° from the Sun, which is in Leo at this time of year.

The sky on 10 September 2015
Twilight ends
Twilight begins

27-day old moon
Waning Crescent


27 days old

Rise Culm. Set
Mercury 08:39 14:11 19:44
Venus 03:47 10:28 17:10
Moon 03:56 10:45 17:35
Mars 03:59 11:02 18:04
Jupiter 05:21 12:01 18:42
Saturn 12:23 17:17 22:10
All times shown in EDT.


The circumstances of this event were computed using the DE405 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

Related news

15 Aug 2015  –  Venus at inferior solar conjunction
20 Sep 2015  –  Venus at greatest brightness
24 Oct 2015  –  Venus reaches highest point in morning sky
25 Oct 2015  –  Venus at dichotomy

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