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🌎 Location: Greenwich, United Kingdom [change]

Comet 18D/Perrine-Mrkos

Comet 18D/Perrine-Mrkos is currently in the constellation of Virgo. The current Right Ascension of Comet 18D/Perrine-Mrkos is 13h 49m 22s and the Declination is -18° 15’ 28” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 18D/Perrine-Mrkos is 31.69 (JPL).

Summary of key facts about Comet 18D/Perrine-Mrkos [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

13h 49m 22s
-18° 15’ 28”

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Additional information about Comet 18D/Perrine-Mrkos available on TheSkyLive:

Available Resources

Comet 18D/Perrine-Mrkos Position and Finder Charts

Below we provide Comet 18D/Perrine-Mrkos finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet 18D/Perrine-Mrkos in Virgo on October, 24 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 18D/Perrine-Mrkos in Virgo on October, 24 2020
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 18D/Perrine-Mrkos is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 13h 49m 22s
Dec: -18° 15’ 28”
Deep sky finder chart for Comet 18D/Perrine-Mrkos
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 18D/Perrine-Mrkos?, a page that provides all the information needed to find Comet 18D/Perrine-Mrkos in the sky and additional links to sky charts.

Comet 18D/Perrine-Mrkos Distance from Earth

The distance of Comet 18D/Perrine-Mrkos from Earth is currently 1,080,621,413 kilometers, equivalent to 7.223508 Astronomical Units. Light takes 1 hours, 4.5650 seconds to travel from Comet 18D/Perrine-Mrkos and arrive to us.

1 hours, 4.5650 seconds

The following chart shows the distance of Comet 18D/Perrine-Mrkos from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet 18D/Perrine-Mrkos from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 18D/Perrine-Mrkos from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 18D/Perrine-Mrkos to Earth

Between January 2013 and December 2100, the closest approach of Comet 18D/Perrine-Mrkos to Earth happens on Sun Nov 28 2032 at a distance of 0.784632 Astronomical Units, or 117,379,285 kilometers:

Sun Nov 28 2032

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet 18D/Perrine-Mrkos brightness

The current visual magnitude of Comet 18D/Perrine-Mrkos is 31.69.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet 18D/Perrine-Mrkos, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Comet 18D/Perrine-Mrkos between January 2013 and December 2100

Comet 18D/Perrine-Mrkos rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Comet 18D/Perrine-Mrkos rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 108.2°
Max altitude: 20.3°
Azimuth: 251.8°

The rise and set times are defined as the time at which the upper limb of Comet 18D/Perrine-Mrkos touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet 18D/Perrine-Mrkos Orbital Elements

The following table lists the orbital elements of Comet 18D/Perrine-Mrkos at epoch 01 January 1970 00:00 UTC (JD: 2440240.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.64258098
Orbit inclination i 17.75898277°
Perihelion distance q 1.27224808 AU
190,325,604 km
Aphelion distance Q 5.84683635 AU
874,674,270 km
Semi-major axis a 3.55954221 AU
532,499,937 km
Orbital period period 6.7200 years
2,452.9554 days
Date of perihelion transit Tp 1968-Nov-01 13:00:40
2,440,162.0421 JD
Next perihelion transit 1975-Jul-21 11:56
2,442,614.9975 JD
Argument of perihelion peri 166.05041712495°
Longitude of the ascending node node 240.87554663092°
Mean anomaly M 11.514613023145°
Mean motion n 0.14676174°/day

Visualization of Comet 18D/Perrine-Mrkos Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 18D/Perrine-Mrkos with respect of the Sun and the orbits of the major planets. The position of Comet 18D/Perrine-Mrkos and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Comet 18D/Perrine-Mrkos
View Comet 18D/Perrine-Mrkos in the 3D Solar System Simulator

Comet 18D/Perrine-Mrkos 15 Days Ephemeris

The following table lists the ephemerides of Comet 18D/Perrine-Mrkos computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 18D/Perrine-Mrkos in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Oct 17 13h 43m 54s -17° 50’ 33” 31.69 Virgo
2020 Oct 18 13h 44m 35s -17° 53’ 38” 31.69 Virgo
2020 Oct 19 13h 45m 16s -17° 56’ 44” 31.69 Virgo
2020 Oct 20 13h 45m 57s -17° 59’ 52” 31.69 Virgo
2020 Oct 21 13h 46m 38s -18° 02’ 58” 31.69 Virgo
2020 Oct 22 13h 47m 21s -18° 06’ 06” 31.69 Virgo
2020 Oct 23 13h 48m 02s -18° 09’ 15” 31.69 Virgo
2020 Oct 24 13h 48m 42s -18° 12’ 24” 31.69 Virgo
2020 Oct 25 13h 49m 23s -18° 15’ 33” 31.69 Virgo
2020 Oct 26 13h 50m 06s -18° 18’ 42” 31.69 Virgo
2020 Oct 27 13h 50m 47s -18° 21’ 51” 31.69 Virgo
2020 Oct 28 13h 51m 28s -18° 25’ 01” 31.69 Virgo
2020 Oct 29 13h 52m 09s -18° 28’ 11” 31.70 Virgo
2020 Oct 30 13h 52m 50s -18° 31’ 22” 31.70 Virgo