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Comet C/2018 O1 (ATLAS)

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Comet C/2018 O1 (ATLAS) Position

Comet C/2018 O1 (ATLAS) is currently in the constellation of Hydra. The current Right Ascension is 10h 46m 11s and the Declination is -23° 24’ 33”.

10h 46m 11s
-23° 24’ 33”

Simplified sky chart showing where Comet C/2018 O1 (ATLAS) is right now in the sky with respect to the brightest stars and constellations (see full screen Online Planetarium)

Map showing Comet C/2018 O1 (ATLAS) in Hydra on January, 23 2020
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]

Higher precision deep sky finder chart showing where Comet C/2018 O1 (ATLAS) is right now (view fullscreen)

C/2018 O1 (ATLAS)
RA: 10h 46m 11s
Dec: -23° 24’ 33”
Deep sky finder chart for Comet C/2018 O1 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2018 O1 (ATLAS)?, a page that provides all the information needed to find Comet C/2018 O1 (ATLAS) in the sky and additional links to sky charts.

Comet C/2018 O1 (ATLAS) Distance

The distance of Comet C/2018 O1 (ATLAS) from Earth is currently 754,411,057 kilometers, equivalent to 5.042926 Astronomical Units. Light takes 41 minutes and 56.4444 seconds to travel from Comet C/2018 O1 (ATLAS) and arrive to us.

41 minutes and 56.4444 seconds

The following chart shows the distance of Comet C/2018 O1 (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 O1 (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 O1 (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 O1 (ATLAS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2018 O1 (ATLAS) to Earth happens on Wed Aug 1 2018 at a distance of 0.70144414 Astronomical Units, or 104,934,549 kilometers:

Wed Aug 1 2018

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

Comet C/2018 O1 (ATLAS) brightness

The current visual magnitude of Comet C/2018 O1 (ATLAS) is 41.19.


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 C/2018 O1 (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 O1 (ATLAS) between January 2013 and December 2100

Comet C/2018 O1 (ATLAS) 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 C/2018 O1 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 113.4°
Max altitude: 15.1°
Azimuth: 246.6°
Comet C/2018 O1 (ATLAS) is below the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Comet C/2018 O1 (ATLAS) 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 C/2018 O1 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2018 O1 (ATLAS) at epoch 02 August 2018 00:00 UTC (JD: 2458333.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.94408886
Orbit inclination i 154.04103143°
Perihelion distance q 1.55817297 AU
233,099,359 km
Aphelion distance Q 54.17930388 AU
8,105,108,513 km
Semi-major axis a 27.86873843 AU
4,169,103,936 km
Orbital period period 147.1200 years
53,737.1205 days
Date of perihelion transit Tp 2018-Aug-31 13:41:18
2,458,362.0704 JD
Next perihelion transit 2165-Oct-16 16:34
2,512,099.1908 JD
Argument of perihelion peri 162.50301975744°
Longitude of the ascending node node 87.619062725144°
Mean anomaly M 359.80859922623°
Mean motion n 0.00669928°/day

Visualization of Comet C/2018 O1 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 O1 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 O1 (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 O1 (ATLAS)
View Comet C/2018 O1 (ATLAS) in the 3D Solar System Simulator

Comet C/2018 O1 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2018 O1 (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 O1 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Jan 16 10h 52m 36s -23° 31’ 31” 41.05 Hydra
2020 Jan 17 10h 51m 47s -23° 31’ 01” 41.07 Hydra
2020 Jan 18 10h 50m 57s -23° 30’ 24” 41.09 Hydra
2020 Jan 19 10h 50m 06s -23° 29’ 39” 41.11 Hydra
2020 Jan 20 10h 49m 14s -23° 28’ 45” 41.13 Hydra
2020 Jan 21 10h 48m 21s -23° 27’ 42” 41.15 Hydra
2020 Jan 22 10h 47m 29s -23° 26’ 30” 41.16 Hydra
2020 Jan 23 10h 46m 35s -23° 25’ 10” 41.18 Hydra
2020 Jan 24 10h 45m 39s -23° 23’ 41” 41.20 Hydra
2020 Jan 25 10h 44m 45s -23° 22’ 04” 41.22 Hydra
2020 Jan 26 10h 43m 50s -23° 20’ 16” 41.24 Hydra
2020 Jan 27 10h 42m 53s -23° 18’ 20” 41.26 Hydra
2020 Jan 28 10h 41m 57s -23° 16’ 14” 41.28 Hydra
2020 Jan 29 10h 41m 00s -23° 13’ 59” 41.30 Hydra