Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed


Objects: Venus

Venus will reach half phase in its 2069 evening apparition. It will be shining brightly at mag -4.4.

From Fairfield , this apparition will not be one of the most prominent and tricky to observe, reaching a peak altitude of 18° above the horizon at sunset on 8 Jul 2069.

2069 evening apparition of Venus

11 Mar 2069 – Venus at superior solar conjunction
08 Jul 2069 – Venus at highest altitude in evening sky
13 Oct 2069 – Venus at dichotomy
14 Oct 2069 – Venus at greatest elongation east
22 Nov 2069 – Venus at greatest brightness
24 Dec 2069 – Venus at inferior solar conjunction

A graph of the phase of Venus is available here.

Apparitions of Venus

22 Dec 2066 – Morning apparition
09 Mar 2068 – Evening apparition
30 Jul 2068 – Morning apparition
14 Oct 2069 – Evening apparition
06 Mar 2070 – Morning apparition
21 May 2071 – Evening apparition
09 Oct 2071 – 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 16h15m30s 24°53'S Scorpius 24.4"
Sun 13h12m 7°42'S Virgo 32'03"

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


Waning Crescent

3%

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

08 Jul 2069  –  Venus at highest altitude in evening sky
14 Oct 2069  –  Venus at greatest elongation east
02 Feb 2070  –  Venus at highest altitude in morning sky
06 Mar 2070  –  Venus at greatest elongation west

Image credit

© NASA/Ricardo Nunes

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