© NASA/Ricardo Nunes

Venus at greatest brightness

Dominic Ford, Editor
From the Inner Planets feed

Objects: Venus
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Venus will reach its greatest brightness in its 2085–2086 morning apparition. It will be shining brightly at mag -4.7.

From Fairfield , this apparition will not be one of the most prominent but , reaching a peak altitude of 24° above the horizon at sunrise on 29 Jan 2086.

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2085–2086 morning apparition of Venus

19 Dec 2085 – Venus at inferior solar conjunction
21 Jan 2086 – Venus at greatest brightness
29 Jan 2086 – Venus at highest altitude in morning sky
01 Mar 2086 – Venus at dichotomy
01 Mar 2086 – Venus at greatest elongation west

A graph of the brightness of Venus is available here.

Apparitions of Venus

05 Mar 2084 – Evening apparition
25 Jul 2084 – Morning apparition
09 Oct 2085 – Evening apparition
01 Mar 2086 – Morning apparition
16 May 2087 – Evening apparition
05 Oct 2087 – Morning apparition
22 Dec 2088 – 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 brightness

Venus's brightness depends on two factors: its closeness to the Earth, and its phase. Its 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 reaches its brightest when it is still a crescent – with less than half of its disk illuminated. This is because it is much closer to the Earth during its crescent phases than at other times.

As a result, during evening apparitions, Venus reaches maximum brightness a few days after it is at greatest separation from the Sun, which always coincides with it showing half-phase (dichotomy).

Conversely, during morning apparitions, Venus reaches maximum brightness a few days before it is at greatest separation from the Sun.

Venus's position

The coordinates of Venus when it reaches its greatest brightness will be:

Object Right Ascension Declination Constellation Angular Size
Venus 17h29m30s 17°38'S Ophiuchus 42.7"
Sun 20h10m 20°01'S Capricornus 32'30"

The coordinates above are given in J2000.0.

The sky on 23 Apr 2024

The sky on 23 April 2024
Sunrise
05:59
Sunset
19:41
Twilight ends
21:24
Twilight begins
04:16

15-day old moon
Waning Gibbous

99%

15 days old

Planets
Rise Culm. Set
Mercury 05:21 11:43 18:05
Venus 05:40 12:09 18:38
Moon 18:35 00:13 05:43
Mars 04:34 10:25 16:16
Jupiter 06:56 14:03 21:10
Saturn 04:16 09:54 15:31
All times shown in EDT.

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

09 Oct 2085  –  Venus at greatest elongation east
29 Jan 2086  –  Venus at highest altitude in morning sky
01 Mar 2086  –  Venus at greatest elongation west
29 Apr 2087  –  Venus at highest altitude in evening sky

Image credit

© NASA/Ricardo Nunes

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Fairfield

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41.14°N
73.26°W
EDT

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