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Comet C/2018 L2 (ATLAS)

Available Resources

Comet C/2018 L2 (ATLAS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2018 L2 (ATLAS) is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet C/2018 L2 (ATLAS) in Andromeda on April, 21 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
00h 50m 36s
+45° 36’ 55”

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.

Comet C/2018 L2 (ATLAS) Rise and Set Times

Comet C/2018 L2 (ATLAS) is circumpolar from Greenwich, United Kingdom [change] and transits at 10:53 UTC (altitude: 84.1°)

Comet C/2018 L2 (ATLAS) Orbit Diagram

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) 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 Apr 14 00h 30m 26s +44° 54’ 38” 16.32 Andromeda
2019 Apr 15 00h 33m 14s +45° 00’ 46” 16.34 Andromeda
2019 Apr 16 00h 36m 00s +45° 06’ 46” 16.37 Andromeda
2019 Apr 17 00h 38m 44s +45° 12’ 38” 16.39 Andromeda
2019 Apr 18 00h 41m 29s +45° 18’ 23” 16.42 Andromeda
2019 Apr 19 00h 44m 12s +45° 23’ 59” 16.45 Andromeda
2019 Apr 20 00h 46m 54s +45° 29’ 30” 16.47 Andromeda
2019 Apr 21 00h 49m 35s +45° 34’ 53” 16.50 Andromeda
2019 Apr 22 00h 52m 14s +45° 40’ 09” 16.52 Andromeda
2019 Apr 23 00h 54m 52s +45° 45’ 18” 16.55 Andromeda
2019 Apr 24 00h 57m 29s +45° 50’ 21” 16.57 Andromeda
2019 Apr 25 01h 00m 06s +45° 55’ 17” 16.60 Andromeda
2019 Apr 26 01h 02m 41s +46° 00’ 07” 16.63 Andromeda
2019 Apr 27 01h 05m 17s +46° 04’ 51” 16.65 Andromeda

Distance of Comet C/2018 L2 (ATLAS) from Earth

The following chart shows the distance of Comet C/2018 L2 (ATLAS) from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2018 L2 (ATLAS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2018 L2 (ATLAS) from Earth between January 2013 and December 2100

Light Curve of Comet C/2018 L2 (ATLAS)

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) Orbital Elements

The following table lists the orbital elements of Comet C/2018 L2 (ATLAS) at epoch 29 July 2018 00:00 UTC (JD: 2458329.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99324119
Orbit inclination i 67.42244015°
Perihelion distance q 1.71170002 AU
256,066,679 km
Aphelion distance Q 504.79781594 AU
75,516,678,551 km
Semi-major axis a 253.25475798 AU
37,886,372,615 km
Orbital period period 4,030.3700 years
1,472,091.6418 days
Date of perihelion transit Tp 2018-Dec-02 13:43:11
2,458,455.0717 JD
Next perihelion transit 6049-May-15 05:07
3,930,546.7135 JD
Argument of perihelion peri 56.227587304082°
Longitude of the ascending node node 243.0181294308°
Mean anomaly M 359.96929144995°
Mean motion n 0.00024455°/day
Closest approach to Earth* 2018-Jun-17
Distance of closest approach* 1.95357477 AU
292,250,627 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2100-Dec-31, with a sampling interval of 1 day.