© 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 2219–2220 evening apparition. It will be shining brightly at mag -4.6.

From Fairfield , this apparition will be well placed and prominent, reaching a peak altitude of 41° above the horizon at sunset on 14 Feb 2220.

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2219–2220 evening apparition of Venus

27 Jan 2220 – Venus at greatest elongation east
29 Jan 2220 – Venus at dichotomy
14 Feb 2220 – Venus at highest altitude in evening sky
04 Mar 2220 – Venus at greatest brightness

A graph of the brightness of Venus is available here.

Apparitions of Venus

06 Apr 2217 – Morning apparition
20 Jun 2218 – Evening apparition
08 Nov 2218 – Morning apparition
27 Jan 2220 – Evening apparition
17 Jun 2220 – Morning apparition
31 Aug 2221 – Evening apparition
20 Jan 2222 – Morning 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 01h06m20s 12°37'N Pisces 39.4"
Sun 22h48m 7°34'S Aquarius 32'17"

The coordinates above are given in J2000.0.

The sky on 3 Jul 2024

The sky on 3 July 2024
Sunrise
05:22
Sunset
20:28
Twilight ends
22:35
Twilight begins
03:15

27-day old moon
Waning Crescent

2%

27 days old

Planets
Rise Culm. Set
Mercury 06:57 14:20 21:44
Venus 06:00 13:30 21:00
Moon 02:47 10:46 18:54
Mars 02:04 09:06 16:08
Jupiter 03:09 10:31 17:53
Saturn 23:46 05:28 11:09
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

14 Feb 2220  –  Venus at highest altitude in evening sky
17 Jun 2220  –  Venus at greatest elongation west
09 Aug 2220  –  Venus at highest altitude in morning sky
14 Jun 2221  –  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
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