Venus at dichotomy

Dominic Ford, Editor
From the Inner Planets feed


Objects: Venus

Venus will reach half phase in its 2277 evening apparition. It will be shining brightly at mag -4.3.

From Fairfield , this apparition will not be one of the most prominent but prominent, reaching a peak altitude of 27° above the horizon at sunset on 7 Jun 2277.

2277 evening apparition of Venus

05 Jan 2277 – Venus at superior solar conjunction
07 Jun 2277 – Venus at highest altitude in evening sky
12 Aug 2277 – Venus at dichotomy
14 Aug 2277 – Venus at greatest elongation east
21 Sep 2277 – Venus at greatest brightness

A graph of the phase of Venus is available here.

Apparitions of Venus

23 Oct 2274 – Morning apparition
10 Jan 2276 – Evening apparition
31 May 2276 – Morning apparition
14 Aug 2277 – Evening apparition
03 Jan 2278 – Morning apparition
22 Mar 2279 – Evening apparition
11 Aug 2279 – 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 12h06m00s 1°45'S Virgo 23.6"
Sun 09h14m 15°56'N Cancer 31'33"

The coordinates above are given in J2000.0.

The sky on 19 Jul 2024

The sky on 19 July 2024
Sunrise
05:34
Sunset
20:21
Twilight ends
22:20
Twilight begins
03:34


Waxing Gibbous

98%

14 days old

Planets
Rise Culm. Set
Mercury 07:54 14:45 21:35
Venus 06:35 13:50 21:04
Moon 19:29 23:48 04:09
Mars 01:34 08:48 16:02
Jupiter 02:18 09:42 17:06
Saturn 22:43 04:24 10:05
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

07 Jun 2277  –  Venus at highest altitude in evening sky
14 Aug 2277  –  Venus at greatest elongation east
12 Dec 2277  –  Venus at highest altitude in morning sky
03 Jan 2278  –  Venus at greatest elongation west

Image credit

© NASA/Ricardo Nunes

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