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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 Ophiucus on December, 12 2018
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]
17h 59m 13s
+12° 25’ 04”

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

Today's Comet C/2018 L2 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 77.7°
Max altitude: 50.9°
Azimuth: 282.5°

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
2018 Dec 05 17h 39m 14s +10° 11’ 02” 14.02 Ophiucus
2018 Dec 06 17h 41m 49s +10° 28’ 17” 14.02 Ophiucus
2018 Dec 07 17h 44m 26s +10° 45’ 39” 14.02 Ophiucus
2018 Dec 08 17h 47m 03s +11° 03’ 12” 14.02 Ophiucus
2018 Dec 09 17h 49m 41s +11° 20’ 54” 14.02 Ophiucus
2018 Dec 10 17h 52m 22s +11° 38’ 47” 14.02 Ophiucus
2018 Dec 11 17h 55m 01s +11° 56’ 47” 14.02 Ophiucus
2018 Dec 12 17h 57m 43s +12° 14’ 57” 14.02 Ophiucus
2018 Dec 13 18h 00m 25s +12° 33’ 15” 14.02 Ophiucus
2018 Dec 14 18h 03m 10s +12° 51’ 42” 14.02 Ophiucus
2018 Dec 15 18h 05m 53s +13° 10’ 18” 14.02 Ophiucus
2018 Dec 16 18h 08m 39s +13° 29’ 03” 14.02 Ophiucus
2018 Dec 17 18h 11m 26s +13° 47’ 56” 14.02 Ophiucus
2018 Dec 18 18h 14m 13s +14° 06’ 57” 14.02 Ophiucus

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 2075

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 2075

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 2075-Dec-31, with a sampling interval of 1 day.