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Comet 150P/LONEOS

Comet 150P/LONEOS is currently in the constellation of Pegasus. The current Right Ascension of Comet 150P/LONEOS is 23h 39m 14s and the Declination is +15° 43’ 23” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 150P/LONEOS is 25.90 (JPL).

Summary of key facts about Comet 150P/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]:

23h 39m 14s
+15° 43’ 23”

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Additional information about Comet 150P/LONEOS available on TheSkyLive:

Available Resources

Comet 150P/LONEOS Position and Finder Charts

Below we provide Comet 150P/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 150P/LONEOS in Pegasus on May, 07 2021
Field of view: 50x30 degrees
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Map showing Comet 150P/LONEOS in Pegasus on May, 07 2021
Field of view: 10x6 degrees
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 = 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 150P/LONEOS is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 23h 39m 14s
Dec: +15° 43’ 23”
Deep sky finder chart for Comet 150P/LONEOS
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 150P/LONEOS?, a page that provides all the information needed to find Comet 150P/LONEOS in the sky and additional links to sky charts.

Comet 150P/LONEOS Distance from Earth

The distance of Comet 150P/LONEOS from Earth is currently 949,174,864 kilometers, equivalent to 6.344842 Astronomical Units. Light takes 52 minutes and 46.1065 seconds to travel from Comet 150P/LONEOS and arrive to us.

52 minutes and 46.1065 seconds

The following chart shows the distance of Comet 150P/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 150P/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 150P/LONEOS from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 150P/LONEOS to Earth

Between January 2013 and December 2100, the closest approach of Comet 150P/LONEOS to Earth happens on Wed Feb 14 2024 at a distance of 0.847468 Astronomical Units, or 126,779,468 kilometers:

Wed Feb 14 2024

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

Comet 150P/LONEOS brightness

The current visual magnitude of Comet 150P/LONEOS is 25.90.


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 150P/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 150P/LONEOS between January 2013 and December 2100

Comet 150P/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 150P/LONEOS rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 74.4°
Max altitude: 54.2°
Azimuth: 285.7°

The rise and set times are defined as the time at which the upper limb of Comet 150P/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 150P/LONEOS Orbital Elements

The following table lists the orbital elements of Comet 150P/LONEOS at epoch 13 April 2009 00:00 UTC (JD: 2454935.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.54577972
Orbit inclination i 18.50019200°
Perihelion distance q 1.76770065 AU
264,444,254 km
Aphelion distance Q 6.01575040 AU
899,943,453 km
Semi-major axis a 3.89172553 AU
582,193,853 km
Orbital period period 7.6800 years
2,804.2177 days
Date of perihelion transit Tp 2008-Nov-25 23:50:58
2,454,796.4937 JD
Next perihelion transit 2016-Jul-31 05:04
2,457,600.7115 JD
Argument of perihelion peri 245.67021023239°
Longitude of the ascending node node 272.42781613041°
Mean anomaly M 17.845353305285°
Mean motion n 0.12837805°/day

Visualization of Comet 150P/LONEOS Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 150P/LONEOS with respect of the Sun and the orbits of the major planets. The position of Comet 150P/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 150P/LONEOS
View Comet 150P/LONEOS in the 3D Solar System Simulator

Comet 150P/LONEOS 15 Days Ephemeris

The following table lists the ephemerides of Comet 150P/LONEOS computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 150P/LONEOS in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Apr 30 23h 34m 50s +14° 59’ 38” 25.94 Pegasus
2021 May 01 23h 35m 23s +15° 05’ 08” 25.94 Pegasus
2021 May 02 23h 35m 57s +15° 10’ 40” 25.93 Pegasus
2021 May 03 23h 36m 32s +15° 16’ 10” 25.93 Pegasus
2021 May 04 23h 37m 05s +15° 21’ 42” 25.92 Pegasus
2021 May 05 23h 37m 39s +15° 27’ 14” 25.92 Pegasus
2021 May 06 23h 38m 12s +15° 32’ 45” 25.91 Pegasus
2021 May 07 23h 38m 44s +15° 38’ 17” 25.90 Pegasus
2021 May 08 23h 39m 16s +15° 43’ 49” 25.90 Pegasus
2021 May 09 23h 39m 48s +15° 49’ 20” 25.89 Pegasus
2021 May 10 23h 40m 20s +15° 54’ 51” 25.89 Pegasus
2021 May 11 23h 40m 51s +16° 00’ 23” 25.88 Pegasus
2021 May 12 23h 41m 22s +16° 05’ 53” 25.87 Pegasus
2021 May 13 23h 41m 53s +16° 11’ 25” 25.87 Pegasus