Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed


Objects: Venus

Venus will reach half phase in its 2066 evening apparition. It will be shining brightly at mag -4.3.

From Jacksonville , this apparition will not be one of the most prominent but prominent, reaching a peak altitude of 33° above the horizon at sunset on 12 Jun 2066.

2066 evening apparition of Venus

24 Dec 2065 – Venus at superior solar conjunction
12 Jun 2066 – Venus at highest altitude in evening sky
31 Jul 2066 – Venus at dichotomy
02 Aug 2066 – Venus at greatest elongation east
09 Sep 2066 – Venus at greatest brightness

A graph of the phase of Venus is available here.

Apparitions of Venus

12 Oct 2063 – Morning apparition
29 Dec 2064 – Evening apparition
19 May 2065 – Morning apparition
02 Aug 2066 – Evening apparition
22 Dec 2066 – Morning apparition
09 Mar 2068 – Evening apparition
30 Jul 2068 – 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 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 11h36m30s 2°02'N Leo 23.5"
Sun 08h42m 18°14'N Cancer 31'30"

The coordinates above are given in J2000.0.

The sky on 23 Jul 2024

The sky on 23 July 2024
Sunrise
06:37
Sunset
20:25
Twilight ends
21:58
Twilight begins
05:04


Waning Gibbous

93%

18 days old

Planets
Rise Culm. Set
Mercury 08:47 15:16 21:45
Venus 07:41 14:27 21:14
Moon 21:48 03:17 08:54
Mars 02:26 09:18 16:09
Jupiter 03:07 10:04 17:00
Saturn 22:54 04:41 10:29
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

12 Jun 2066  –  Venus at highest altitude in evening sky
02 Aug 2066  –  Venus at greatest elongation east
07 Dec 2066  –  Venus at highest altitude in morning sky
22 Dec 2066  –  Venus at greatest elongation west

Image credit

© NASA/Ricardo Nunes

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