© NASA/Ricardo Nunes

Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed

Objects: Venus
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The sky at

Venus will reach half phase in its 2188 morning apparition. It will be shining brightly at mag -4.3.

From Jacksonville , this apparition will be well placed and prominent, reaching a peak altitude of 38° above the horizon at sunrise on 31 Jul 2188.

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2188 morning apparition of Venus

16 Apr 2188 – Venus at inferior solar conjunction
19 May 2188 – Venus at greatest brightness
25 Jun 2188 – Venus at greatest elongation west
26 Jun 2188 – Venus at dichotomy
31 Jul 2188 – Venus at highest altitude in morning sky
02 Feb 2189 – Venus at superior solar conjunction

A graph of the phase of Venus is available here.

Apparitions of Venus

29 Jun 2186 – Evening apparition
17 Nov 2186 – Morning apparition
04 Feb 2188 – Evening apparition
25 Jun 2188 – Morning apparition
08 Sep 2189 – Evening apparition
29 Jan 2190 – Morning apparition
16 Apr 2191 – Evening apparition

Observing Venus

Venus's orbit lies closer to the Sun than the Earth's, meaning that it always appears close to the Sun and is lost in the Sun's glare much of the time.

It is observable for a few months each time it reaches greatest separation from the Sun – moments referred to as greatest elongation. These apparitions repeat roughly once every 1.6 years.

On these occasions, Venus is so bright and conspicuous that it becomes the third brightest object in the sky after the Sun and Moon. It is often called the morning star or the evening star.

Venus's phase

Venus's phase varies depending on its position relative to the Earth. When it passes between the Earth and Sun, for example, the side that is turned towards the Earth is entirely unilluminated, like a new moon.

Conversely, when it lies opposite to the Earth in its orbit, passing almost behind the Sun, it appears fully illuminated, like a full moon. However, at this time it is also at its most distant from the Earth, so it is actually fainter than at other times.

Venus shows an intermediate half phase – called dichotomy – at roughly the same moment that it appears furthest from the Sun, at greatest elongation. The exact times of the two events may differ by a few days, only because Venus's orbit is not quite perfectly aligned with the ecliptic.

Venus's position

The coordinates of Venus when it reaches dichotomy will be:

Object Right Ascension Declination Constellation Angular Size
Venus 03h03m00s 14°02'N Aries 23.5"
Sun 06h13m 23°22'N Gemini 31'28"

The coordinates above are given in J2000.0.

The sky on 25 Nov 2024

The sky on 25 November 2024
Sunrise
06:58
Sunset
17:25
Twilight ends
18:50
Twilight begins
05:34

24-day old moon
Waning Crescent

23%

24 days old

Planets
Rise Culm. Set
Mercury 08:31 13:31 18:31
Venus 10:16 15:16 20:17
Moon 01:59 08:09 14:11
Mars 21:43 04:39 11:34
Jupiter 18:15 01:13 08:12
Saturn 13:21 19:03 00:45
All times shown in EST.

Source

The circumstances of this event were computed using the DE430 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

25 Jun 2188  –  Venus at greatest elongation west
31 Jul 2188  –  Venus at highest altitude in morning sky
03 Jul 2189  –  Venus at highest altitude in evening sky
08 Sep 2189  –  Venus at greatest elongation east

Image credit

© NASA/Ricardo Nunes

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Jacksonville

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30.33°N
81.66°W
EST

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