© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.

45P/Honda-Mrkos-Pajdusakova at perihelion

Dominic Ford, Editor
From the Comets feed

Please wait
Loading 0/4
Click and drag to rotate
Mouse wheel to zoom in/out
Touch with mouse to dismiss
The sky at

Comet 45P/Honda-Mrkos-Pajdusakova will make its closest approach to the Sun, at a distance of 0.56 AU.

From Ashburn the 2027 apparition of 45P/Honda-Mrkos-Pajdusakova will progress as follows:

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.
23 Aug 2027 – 45P/Honda-Mrkos-Pajdusakova at perihelion
02 Aug 2027TaurusNot observable
04 Aug 2027OrionNot observable
06 Aug 2027OrionNot observable
08 Aug 2027GeminiNot observable
10 Aug 2027GeminiNot observable
12 Aug 2027GeminiNot observable
14 Aug 2027GeminiNot observable
16 Aug 2027GeminiNot observable
18 Aug 2027GeminiNot observable
20 Aug 2027GeminiNot observable
22 Aug 2027CancerNot observable
24 Aug 2027CancerNot observable
26 Aug 2027CancerNot observable
28 Aug 2027CancerNot observable
30 Aug 2027CancerNot observable
01 Sep 2027CancerNot observable
03 Sep 2027CancerNot observable
05 Sep 2027LeoNot observable
07 Sep 2027LeoNot observable
09 Sep 2027LeoNot observable
11 Sep 2027LeoNot observable

A more detailed table of 45P/Honda-Mrkos-Pajdusakova's position on each night is available here. A diagram of the orbit of 45P/Honda-Mrkos-Pajdusakova is available here.

At the moment of perihelion it will not be observable – it will reach its highest point in the sky during daytime and will be no higher than 13° above the horizon at dawn.

Finder chart

The chart below shows the path of 45P/Honda-Mrkos-Pajdusakova 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.

Comet brightnesses

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 45P/Honda-Mrkos-Pajdusakova is currently available.

The comet's position at perihelion will be:

Object Right Ascension Declination Constellation Magnitude
Comet 45P/Honda-Mrkos-Pajdusakova 08h07m00s +19°01' Cancer 8.1

The coordinates are given in J2000.0.

The sky on 23 August 2027
Twilight ends
Twilight begins

21-day old moon
Waning Gibbous


21 days old

Rise Culm. Set
Mercury 07:28 13:58 20:29
Venus 06:45 13:26 20:08
Moon 22:50 05:22 12:32
Mars 10:58 16:30 22:03
Jupiter 06:58 13:35 20:12
Saturn 22:17 04:50 11:20
All times shown in EDT.


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.

Image credit

© Andy Roberts 1997. Pictured comet is C/1995 O1 Hale-Bopp.






Color scheme