Comet 185P/Petriew will make its closest approach to the Sun, at a distance of 0.93 AU.
|27 Jan 2018||– 185P/Petriew at perihelion|
|06 Jan 2018||Capricornus||Visible from 17:51 until 18:02|
Highest at 17:51, 24° above SW horizon
|08 Jan 2018||Aquarius||Visible from 17:53 until 18:04|
Highest at 17:53, 24° above SW horizon
|10 Jan 2018||Aquarius||Visible from 17:55 until 18:06|
Highest at 17:55, 24° above SW horizon
|12 Jan 2018||Aquarius||Visible from 17:57 until 18:09|
Highest at 17:57, 24° above SW horizon
|14 Jan 2018||Aquarius||Visible from 17:59 until 18:12|
Highest at 17:59, 24° above SW horizon
|16 Jan 2018||Aquarius||Visible from 18:01 until 18:15|
Highest at 18:01, 24° above SW horizon
|18 Jan 2018||Aquarius||Visible from 18:03 until 18:18|
Highest at 18:03, 24° above SW horizon
|20 Jan 2018||Aquarius||Visible from 18:05 until 18:22|
Highest at 18:05, 25° above SW horizon
|22 Jan 2018||Aquarius||Visible from 18:07 until 18:25|
Highest at 18:07, 25° above SW horizon
|24 Jan 2018||Aquarius||Visible from 18:09 until 18:29|
Highest at 18:09, 25° above SW horizon
|26 Jan 2018||Aquarius||Visible from 18:11 until 18:32|
Highest at 18:11, 25° above SW horizon
|28 Jan 2018||Aquarius||Visible from 18:14 until 18:36|
Highest at 18:14, 26° above SW horizon
|30 Jan 2018||Pisces||Visible from 18:16 until 18:40|
Highest at 18:16, 26° above SW horizon
|01 Feb 2018||Pisces||Visible from 18:18 until 18:44|
Highest at 18:18, 27° above SW horizon
|03 Feb 2018||Pisces||Visible from 18:20 until 18:48|
Highest at 18:20, 27° above SW horizon
|05 Feb 2018||Pisces||Visible from 18:22 until 18:52|
Highest at 18:22, 27° above SW horizon
|07 Feb 2018||Pisces||Visible from 18:25 until 18:57|
Highest at 18:25, 27° above SW horizon
|09 Feb 2018||Cetus||Visible from 18:27 until 19:01|
Highest at 18:27, 28° above SW horizon
|11 Feb 2018||Cetus||Visible from 18:29 until 19:05|
Highest at 18:29, 28° above SW horizon
|13 Feb 2018||Cetus||Visible from 18:31 until 19:09|
Highest at 18:31, 29° above SW horizon
|15 Feb 2018||Cetus||Visible from 18:34 until 19:14|
Highest at 18:34, 29° above SW horizon
At the moment of perihelion it will become visible around 18:10 (EST) as the dusk sky fades, 25° above your south-western horizon. It will then sink towards the horizon, setting 3 hours and 37 minutes after the Sun at 20:37.
The chart below shows the path of 185P/Petriew over the course of its apparition, as calculated from the orbital elements published by the Minor Planet Center (MPC). It 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.
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.
No estimate for the brightness of comet 185P/Petriew is currently available.
The comet's position at perihelion will be:
The coordinates are given in J2000.0.
|The sky on 27 January 2018|
10 days old
All times shown in EST.
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 06 Dec 2020.
© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.