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Comet 201P/LONEOS

Comet 201P/LONEOS is currently in the constellation of Pisces. The current Right Ascension of Comet 201P/LONEOS is 01h 34m 19s and the Declination is +10° 10’ 14” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 201P/LONEOS is 16.65 (JPL).

Summary of key facts about Comet 201P/LONEOS [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]:

01h 34m 19s
+10° 10’ 14”

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Additional information about Comet 201P/LONEOS available on TheSkyLive:

Available Resources

Comet 201P/LONEOS Position and Finder Charts

Below we provide Comet 201P/LONEOS 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 201P/LONEOS in Pisces on April, 16 2021
Field of view: 50x30 degrees
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Map showing Comet 201P/LONEOS in Pisces on April, 16 2021
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 201P/LONEOS is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 01h 34m 19s
Dec: +10° 10’ 14”
Deep sky finder chart for Comet 201P/LONEOS
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 201P/LONEOS?, a page that provides all the information needed to find Comet 201P/LONEOS in the sky and additional links to sky charts.

Comet 201P/LONEOS Distance from Earth

The distance of Comet 201P/LONEOS from Earth is currently 346,939,621 kilometers, equivalent to 2.319148 Astronomical Units. Light takes 19 minutes and 17.2660 seconds to travel from Comet 201P/LONEOS and arrive to us.

19 minutes and 17.2660 seconds

The following chart shows the distance of Comet 201P/LONEOS 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 201P/LONEOS 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 201P/LONEOS from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 201P/LONEOS to Earth

Between January 2013 and December 2100, the closest approach of Comet 201P/LONEOS to Earth happens on Tue Nov 26 2097 at a distance of 0.367929 Astronomical Units, or 55,041,391 kilometers:

Tue Nov 26 2097

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

Comet 201P/LONEOS brightness

The current visual magnitude of Comet 201P/LONEOS is 16.65.


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 201P/LONEOS, 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 201P/LONEOS between January 2013 and December 2100

Comet 201P/LONEOS 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 201P/LONEOS rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 79.8°
Max altitude: 48.8°
Azimuth: 280.4°

The rise and set times are defined as the time at which the upper limb of Comet 201P/LONEOS 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 201P/LONEOS Orbital Elements

The following table lists the orbital elements of Comet 201P/LONEOS at epoch 07 May 2012 00:00 UTC (JD: 2456055.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.61286098
Orbit inclination i 7.03651944°
Perihelion distance q 1.33998367 AU
200,458,704 km
Aphelion distance Q 5.58250985 AU
835,131,588 km
Semi-major axis a 3.46124676 AU
517,795,146 km
Orbital period period 6.4400 years
2,352.0539 days
Date of perihelion transit Tp 2015-Jan-14 08:01:42
2,457,036.8345 JD
Next perihelion transit 2021-Jun-23 09:19
2,459,388.8884 JD
Argument of perihelion peri 24.953960131182°
Longitude of the ascending node node 35.285667930831°
Mean anomaly M 209.79917909156°
Mean motion n 0.15305772°/day

Visualization of Comet 201P/LONEOS Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 201P/LONEOS with respect of the Sun and the orbits of the major planets. The position of Comet 201P/LONEOS 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 201P/LONEOS
View Comet 201P/LONEOS in the 3D Solar System Simulator

Comet 201P/LONEOS 15 Days Ephemeris

The following table lists the ephemerides of Comet 201P/LONEOS computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 201P/LONEOS in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Apr 09 01h 11m 30s +07° 34’ 09” 16.85 Pisces
2021 Apr 10 01h 14m 38s +07° 55’ 59” 16.82 Pisces
2021 Apr 11 01h 17m 47s +08° 17’ 48” 16.79 Pisces
2021 Apr 12 01h 20m 57s +08° 39’ 38” 16.76 Pisces
2021 Apr 13 01h 24m 07s +09° 01’ 27” 16.73 Pisces
2021 Apr 14 01h 27m 20s +09° 23’ 14” 16.70 Pisces
2021 Apr 15 01h 30m 33s +09° 45’ 02” 16.68 Pisces
2021 Apr 16 01h 33m 47s +10° 06’ 46” 16.65 Pisces
2021 Apr 17 01h 37m 04s +10° 28’ 27” 16.62 Pisces
2021 Apr 18 01h 40m 21s +10° 50’ 08” 16.60 Pisces
2021 Apr 19 01h 43m 39s +11° 11’ 44” 16.57 Pisces
2021 Apr 20 01h 46m 58s +11° 33’ 15” 16.54 Aries
2021 Apr 21 01h 50m 18s +11° 54’ 44” 16.52 Aries
2021 Apr 22 01h 53m 40s +12° 16’ 09” 16.49 Aries