Your guide to the Solar System and the night sky
Please donate now to help keep TheSkyLive ads-free. This site cannot run without your voluntary donations.
🌎  Greenwich, United Kingdom [change]

Comet 18D/Perrine-Mrkos (Lost)

Comet 18D/Perrine-Mrkos (Lost) is currently in the constellation of Libra. The current Right Ascension of Comet 18D/Perrine-Mrkos (Lost) is 15h 28m 43s and the Declination is -17° 47’ 04” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 18D/Perrine-Mrkos (Lost) is 30.08 (JPL).

Summary of key facts about Comet 18D/Perrine-Mrkos (Lost) [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]:

15h 28m 43s
-17° 47’ 04”
  • 18D/Perrine-Mrkos (Lost) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-West direction at an altitude of 14° above the horizon.
  • Given its current magnitude, 18D/Perrine-Mrkos (Lost) is visible only through long exposure photography.
  • See also 18D/Perrine-Mrkos (Lost) rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

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

Available Resources

Comet 18D/Perrine-Mrkos (Lost) Position and Finder Charts

Below we provide Comet 18D/Perrine-Mrkos (Lost) 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 (Lost) in Libra on October, 01 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 18D/Perrine-Mrkos (Lost) in Libra on October, 01 2022
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 (Lost) is right now. Click on the image to see a more detailed fullscreen tracker view.

18D/Perrine-Mrkos (Lost)
RA: 15h 28m 43s
Dec: -17° 47’ 04”
Deep sky finder chart for Comet 18D/Perrine-Mrkos (Lost)
Field of view: 60x40 arcmins
View fullscreen

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

Comet 18D/Perrine-Mrkos (Lost) Distance from Earth

The distance of Comet 18D/Perrine-Mrkos (Lost) from Earth is currently 906,335,064 kilometers, equivalent to 6.058476 Astronomical Units. Light takes 50 minutes and 23.2084 seconds to travel from Comet 18D/Perrine-Mrkos (Lost) and arrive to us.

50 minutes and 23.2084 seconds

The following chart shows the distance of Comet 18D/Perrine-Mrkos (Lost) 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 (Lost) 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 (Lost) 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 (Lost) to Earth

Between January 2013 and December 2100, the closest approach of Comet 18D/Perrine-Mrkos (Lost) to Earth happens on Sun Nov 28 2032 at a distance of 0.784610 Astronomical Units, or 117,375,995 kilometers:

Sun Nov 28 2032

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

Comet 18D/Perrine-Mrkos (Lost) brightness

The current visual magnitude of Comet 18D/Perrine-Mrkos (Lost) is 30.08.


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 (Lost), 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 (Lost) between January 2013 and December 2100

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

Azimuth: 107.8°
Max altitude: 20.7°
Azimuth: 252.2°

The rise and set times are defined as the time at which the upper limb of Comet 18D/Perrine-Mrkos (Lost) 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 (Lost) Orbital Elements

The following table lists the orbital elements of Comet 18D/Perrine-Mrkos (Lost) 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 6.7158 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 (Lost) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 18D/Perrine-Mrkos (Lost) with respect of the Sun and the orbits of the major planets. The position of Comet 18D/Perrine-Mrkos (Lost) 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 (Lost)
View Comet 18D/Perrine-Mrkos (Lost) in the 3D Solar System Simulator

Comet 18D/Perrine-Mrkos (Lost) 15 Days Ephemeris

The following table lists the ephemerides of Comet 18D/Perrine-Mrkos (Lost) 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 (Lost) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2022 Sep 24 15h 23m 53s -17° 35’ 08” 30.09 Libra
2022 Sep 25 15h 24m 29s -17° 36’ 38” 30.09 Libra
2022 Sep 26 15h 25m 05s -17° 38’ 08” 30.09 Libra
2022 Sep 27 15h 25m 42s -17° 39’ 39” 30.09 Libra
2022 Sep 28 15h 26m 21s -17° 41’ 12” 30.08 Libra
2022 Sep 29 15h 26m 58s -17° 42’ 44” 30.08 Libra
2022 Sep 30 15h 27m 37s -17° 44’ 18” 30.08 Libra
2022 Oct 01 15h 28m 15s -17° 45’ 55” 30.08 Libra
2022 Oct 02 15h 28m 54s -17° 47’ 30” 30.08 Libra
2022 Oct 03 15h 29m 34s -17° 49’ 08” 30.08 Libra
2022 Oct 04 15h 30m 14s -17° 50’ 44” 30.08 Libra
2022 Oct 05 15h 30m 54s -17° 52’ 23” 30.07 Libra
2022 Oct 06 15h 31m 35s -17° 54’ 02” 30.07 Libra
2022 Oct 07 15h 32m 14s -17° 55’ 42” 30.07 Libra