Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed


Objects: Venus

Venus will reach half phase in its 2026–2027 morning apparition. It will be shining brightly at mag -4.4.

From Cambridge , this apparition will not be one of the most prominent but prominent, reaching a peak altitude of 33° above the horizon at sunrise on 11 Dec 2026.

2026–2027 morning apparition of Venus

23 Oct 2026 – Venus at inferior solar conjunction
27 Nov 2026 – Venus at greatest brightness
11 Dec 2026 – Venus at highest altitude in morning sky
03 Jan 2027 – Venus at dichotomy
03 Jan 2027 – Venus at greatest elongation west
11 Aug 2027 – Venus at superior solar conjunction

The table below lists the altitude of Venus at sunrise over the course of the apparition. All times are given in Cambridge local time.

Date Sun
rises at
Venus
rises at
Altitude
at sunrise
Direction
at sunrise
Mag Phase
01 Nov 202606:1505:20south-east-4.23%
11 Nov 202606:2704:1921°south-east-4.510%
21 Nov 202606:3903:3928°south-east-4.619%
01 Dec 202606:5103:1932°south-east-4.628%
11 Dec 202607:0103:1133°south-east-4.636%
21 Dec 202607:0703:1332°south-east-4.542%
31 Dec 202607:1103:2130°south-4.548%
10 Jan 202707:1003:3327°south-4.454%
20 Jan 202707:0603:4625°south-east-4.358%
30 Jan 202706:5804:0022°south-east-4.362%
09 Feb 202706:4704:1220°south-east-4.266%
19 Feb 202706:3304:2118°south-east-4.170%
01 Mar 202706:1804:2516°south-east-4.173%

A graph of the phase of Venus is available here.

Apparitions of Venus

10 Jan 2025 – Evening apparition
31 May 2025 – Morning apparition
14 Aug 2026 – Evening apparition
03 Jan 2027 – Morning apparition
21 Mar 2028 – Evening apparition
11 Aug 2028 – Morning apparition
27 Oct 2029 – 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 15h35m50s 15°50'S Libra 24.9"
Sun 18h53m 22°51'S Sagittarius 32'31"

The coordinates above are given in J2000.0.

The sky on 3 Jan 2027

The sky on 3 January 2027
Sunrise
07:11
Sunset
16:23
Twilight ends
18:04
Twilight begins
05:30


Waning Crescent

13%

25 days old

Planets
Rise Culm. Set
Mercury 07:28 11:53 16:18
Venus 03:27 08:30 13:32
Moon 03:52 08:20 12:44
Mars 20:59 03:43 10:27
Jupiter 19:52 02:47 09:42
Saturn 11:18 17:24 23:31
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

11 Dec 2026  –  Venus at highest altitude in morning sky
03 Jan 2027  –  Venus at greatest elongation west
21 Mar 2028  –  Venus at greatest elongation east
24 Mar 2028  –  Venus at highest altitude in evening sky

Image credit

© NASA/Ricardo Nunes

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