None available.

C/2018 W2 (Africano) reaches its brightest

Dominic Ford, Editor
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Comet C/2018 W2 (Africano) is forecast to reach its brightest. It will lie at a distance of 1.49 AU from the Sun, and at a distance of 0.50 AU from the Earth.

From Fairfield, it will be visible all night. It will become visible around 19:49 (EDT) as the dusk sky fades, 24° above your eastern horizon. It will then reach its highest point in the sky at 00:38, 66° above your southern horizon. It will be lost to dawn twilight around 05:38, 22° above your western horizon.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

The chart below shows the path of C/2018 W2 (Africano) over the course of its apparition, as calculated from the orbital elements published by the Minor Planet Center (MPC).

The chart is available for download, either on dark background, in PNG, PDF or SVG formats, or on a light background, in PNG, PDF or SVG formats. It was produced using StarCharter.

Alternatively, you can create a textual listing of the comet's position using In-The-Sky.org's ephemeris generator.

Comets are intrinsically highly unpredictable objects, since their brightness depends on the scattering of sunlight from dust particles in the comet's coma and tail. This dust is continually streaming away from the comet's nucleus, and its density at any particular time is governed by the rate of sublimation of the ice in the comet's nucleus, as it is heated by the Sun's rays. It also depends on the amount of dust that is mixed in with that ice. This is very difficult to predict in advance, and can be highly variable even between successive apparitions of the same comet.

In consequence, while the future positions of comets are usually known with a high degree of confidence, their future brightnesses are not. For most comets, we do not publish any magnitude estimates at all. For the few comets where we do make estimates, we generally prefer the BAA's magnitude parameters to those published by the Minor Planet Center, since they are typically updated more often.

Based on the magnitude parameters published for this comet by the BAA Comet Section, we estimate that it may be around mag 9 on 26 September 2019. This estimate is based on observations that the BAA has received from amateur astronomers, assuming that its current level of activity will remain constant.

This comet is not expected to be visible to the naked eye, but might be visible through bird-watching binoculars.

The comet's position on 26 September 2019 will be:

Object Right Ascension Declination Constellation Magnitude
Comet C/2018 W2 (Africano) 00h02m50s +17°12' Pegasus 8.9

The coordinates are given in J2000.0.

The sky on 26 September 2019
Sunrise
06:44
Sunset
18:44
Twilight ends
20:17
Twilight begins
05:12

27-day old moon
Waning Crescent

6%

27 days old

Planets
Rise Culm. Set
Mercury 08:12 13:46 19:20
Venus 07:43 13:29 19:15
Moon 04:00 10:56 17:52
Mars 06:03 12:16 18:29
Jupiter 12:59 17:37 22:16
Saturn 14:53 19:31 00:14
All times shown in EDT.

Source

This event was automatically generated on the basis of orbital elements published by the Minor Planet Center (MPC) , and is updated whenever new elements become available. It was last updated on 07 May 2020.

Image credit

None available.

Fairfield

Latitude:
Longitude:
Timezone:

41.14°N
73.26°W
EDT

Color scheme