Venus at greatest brightness

Dominic Ford, Editor
From the Inner Planets feed


Objects: Venus

Venus will reach its greatest brightness in its 2106 evening apparition. It will be shining brightly at mag -4.5.

From Columbus , this apparition will not be one of the most prominent but prominent, reaching a peak altitude of 31° above the horizon at sunset on 28 May 2106.

2106 evening apparition of Venus

27 May 2106 – Venus at highest altitude in evening sky
20 Jul 2106 – Venus at dichotomy
22 Jul 2106 – Venus at greatest elongation east
29 Aug 2106 – Venus at greatest brightness

A graph of the brightness of Venus is available here.

Apparitions of Venus

01 Oct 2103 – Morning apparition
18 Dec 2104 – Evening apparition
08 May 2105 – Morning apparition
22 Jul 2106 – Evening apparition
11 Dec 2106 – Morning apparition
28 Feb 2108 – Evening apparition
19 Jul 2108 – 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 12h34m20s 9°18'S Virgo 40.7"
Sun 10h25m 9°51'N Leo 31'39"

The coordinates above are given in J2000.0.

The sky on 23 Nov 2024

The sky on 23 November 2024
Sunrise
07:24
Sunset
17:09
Twilight ends
18:45
Twilight begins
05:48


Waning Crescent

43%

22 days old

Planets
Rise Culm. Set
Mercury 09:12 13:43 18:13
Venus 10:48 15:19 19:50
Moon 00:03 06:55 13:36
Mars 21:31 04:51 12:10
Jupiter 18:04 01:28 08:51
Saturn 13:43 19:16 00:49
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

22 Jul 2106  –  Venus at greatest elongation east
24 Nov 2106  –  Venus at highest altitude in morning sky
11 Dec 2106  –  Venus at greatest elongation west
28 Feb 2108  –  Venus at greatest elongation east

Image credit

© NASA/Ricardo Nunes

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