Your guide to the Solar System
🌎 Location: Greenwich, United Kingdom [change]
Comets » 

Comet C/2018 L2 (ATLAS)

Available Resources

Comet C/2018 L2 (ATLAS) Position

Comet C/2018 L2 (ATLAS) is currently in the constellation of Perseus. The current Right Ascension is 03h 28m 33s and the Declination is +47° 10’ 20”.

03h 28m 33s
+47° 10’ 20”

Simplified sky chart showing where Comet C/2018 L2 (ATLAS) is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet C/2018 L2 (ATLAS) in Perseus on October, 21 2019
Field of view: 60x30 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]

Hihgher precision deep sky finder chart showing where Comet C/2018 L2 (ATLAS) is right now (view fullscreen)

C/2018 L2 (ATLAS)
RA: 03h 28m 33s
Dec: +47° 10’ 20”
Deep sky finder chart for Comet C/2018 L2 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2018 L2 (ATLAS)?, a page that provides all the information needed to find Comet C/2018 L2 (ATLAS) in the sky and additional links to sky charts.

Comet C/2018 L2 (ATLAS) Distance

The distance of Comet C/2018 L2 (ATLAS) from Earth is currently 499,591,289 kilometers, equivalent to 3.339561 Astronomical Units. Light takes 27 minutes and 46.4572 seconds to travel from Comet C/2018 L2 (ATLAS) and arrive to us.

27 minutes and 46.4572 seconds

The following chart shows the distance of Comet C/2018 L2 (ATLAS) 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 C/2018 L2 (ATLAS) 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 C/2018 L2 (ATLAS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2018 L2 (ATLAS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2018 L2 (ATLAS) to Earth happens on Sun Jun 17 2018 at a distance of 1.95353317 Astronomical Units, or 292,244,403 kilometers:

Sun Jun 17 2018

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

Comet C/2018 L2 (ATLAS) brightness

The current visual magnitude of Comet C/2018 L2 (ATLAS) is 19.63.


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 behvior 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 C/2018 L2 (ATLAS), 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 C/2018 L2 (ATLAS) between January 2013 and December 2100

Comet C/2018 L2 (ATLAS) rise and set times

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

Comet C/2018 L2 (ATLAS) is circumpolar and transits at 01:31 UTC (altitude: 85.7°)

The rise and set times are defined as the time at which the upper limb of Comet C/2018 L2 (ATLAS) touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2018 L2 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2018 L2 (ATLAS) at epoch 12 October 2018 00:00 UTC (JD: 2458404.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99303764
Orbit inclination i 67.42363332°
Perihelion distance q 1.71168364 AU
256,064,229 km
Aphelion distance Q 489.98469756 AU
73,300,667,577 km
Semi-major axis a 245.84819060 AU
36,778,365,903 km
Orbital period period 3,854.8600 years
1,407,987.9932 days
Date of perihelion transit Tp 2018-Dec-02 13:51:12
2,458,455.0772 JD
Next perihelion transit 5873-Nov-10 13:41
3,866,443.0705 JD
Argument of perihelion peri 56.2292075926°
Longitude of the ascending node node 243.01855237977°
Mean anomaly M 359.9870682129°
Mean motion n 0.00025568°/day

Visualization of Comet C/2018 L2 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 L2 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 L2 (ATLAS) 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 C/2018 L2 (ATLAS)
View Comet C/2018 L2 (ATLAS) in the 3D Solar System Simulator

Comet C/2018 L2 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2018 L2 (ATLAS) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2018 L2 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Oct 14 03h 36m 23s +47° 55’ 59” 19.54 Perseus
2019 Oct 15 03h 35m 18s +47° 50’ 07” 19.55 Perseus
2019 Oct 16 03h 34m 13s +47° 44’ 03” 19.56 Perseus
2019 Oct 17 03h 33m 06s +47° 37’ 46” 19.58 Perseus
2019 Oct 18 03h 32m 00s +47° 31’ 18” 19.59 Perseus
2019 Oct 19 03h 30m 54s +47° 24’ 38” 19.60 Perseus
2019 Oct 20 03h 29m 45s +47° 17’ 47” 19.62 Perseus
2019 Oct 21 03h 28m 36s +47° 10’ 44” 19.63 Perseus
2019 Oct 22 03h 27m 28s +47° 03’ 28” 19.64 Perseus
2019 Oct 23 03h 26m 18s +46° 56’ 00” 19.66 Perseus
2019 Oct 24 03h 25m 09s +46° 48’ 20” 19.67 Perseus
2019 Oct 25 03h 23m 58s +46° 40’ 29” 19.68 Perseus
2019 Oct 26 03h 22m 49s +46° 32’ 26” 19.70 Perseus
2019 Oct 27 03h 21m 38s +46° 24’ 11” 19.71 Perseus