Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed


Objects: Venus

Venus will reach half phase in its 2227–2228 evening apparition. It will be shining brightly at mag -4.4.

From Fairfield , this apparition will be well placed and prominent, reaching a peak altitude of 40° above the horizon at sunset on 13 Feb 2228.

2227–2228 evening apparition of Venus

18 Jun 2227 – Venus at superior solar conjunction
24 Jan 2228 – Venus at greatest elongation east
27 Jan 2228 – Venus at dichotomy
12 Feb 2228 – Venus at highest altitude in evening sky
01 Mar 2228 – Venus at greatest brightness

A graph of the phase of Venus is available here.

Apparitions of Venus

03 Apr 2225 – Morning apparition
18 Jun 2226 – Evening apparition
06 Nov 2226 – Morning apparition
24 Jan 2228 – Evening apparition
14 Jun 2228 – Morning apparition
28 Aug 2229 – Evening apparition
17 Jan 2230 – 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 23h23m20s 3°36'S Aquarius 24.9"
Sun 20h21m 19°25'S Capricornus 32'29"

The coordinates above are given in J2000.0.

The sky on 4 Jul 2024

The sky on 4 July 2024
Sunrise
05:23
Sunset
20:28
Twilight ends
22:34
Twilight begins
03:16


Waning Crescent

1%

28 days old

Planets
Rise Culm. Set
Mercury 07:01 14:23 21:45
Venus 06:02 13:31 21:01
Moon 03:35 11:45 19:58
Mars 02:02 09:05 16:07
Jupiter 03:06 10:28 17:50
Saturn 23:43 05:24 11:05
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

24 Jan 2228  –  Venus at greatest elongation east
13 Feb 2228  –  Venus at highest altitude in evening sky
14 Jun 2228  –  Venus at greatest elongation west
08 Aug 2228  –  Venus at highest altitude in morning sky

Image credit

© NASA/Ricardo Nunes

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