© NASA/Ricardo Nunes

Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed

Objects: Venus
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Venus will reach half phase in its 2297 morning apparition. It will be shining brightly at mag -4.4.

From Cambridge , this apparition will not be one of the most prominent but , reaching a peak altitude of 23° above the horizon at sunrise on 9 Feb 2297.

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2297 morning apparition of Venus

31 Dec 2296 – Venus at inferior solar conjunction
01 Feb 2297 – Venus at greatest brightness
08 Feb 2297 – Venus at highest altitude in morning sky
12 Mar 2297 – Venus at greatest elongation west
13 Mar 2297 – Venus at dichotomy
15 Oct 2297 – Venus at superior solar conjunction

A graph of the phase of Venus is available here.

Apparitions of Venus

17 Mar 2295 – Evening apparition
07 Aug 2295 – Morning apparition
21 Oct 2296 – Evening apparition
12 Mar 2297 – Morning apparition
28 May 2298 – Evening apparition
16 Oct 2298 – Morning apparition
03 Jan 2300 – Evening 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 20h15m20s 17°14'S Capricornus 24.5"
Sun 23h18m 4°24'S Aquarius 32'13"

The coordinates above are given in J2000.0.

The sky on 2 Jul 2024

The sky on 2 July 2024
Sunrise
05:09
Sunset
20:24
Twilight ends
22:37
Twilight begins
02:55

26-day old moon
Waning Crescent

7%

26 days old

Planets
Rise Culm. Set
Mercury 06:39 14:09 21:38
Venus 05:45 13:20 20:55
Moon 01:56 09:40 17:38
Mars 01:54 08:58 16:02
Jupiter 03:00 10:26 17:51
Saturn 23:43 05:23 11:04
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 Mar 2297  –  Venus at greatest elongation west
06 May 2298  –  Venus at highest altitude in evening sky
28 May 2298  –  Venus at greatest elongation east
16 Oct 2298  –  Venus at highest altitude in morning sky

Image credit

© NASA/Ricardo Nunes

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Cambridge

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42.38°N
71.11°W
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