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Comet C/2018 A3 (ATLAS)

Available Resources

Comet C/2018 A3 (ATLAS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2018 A3 (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 A3 (ATLAS) in Coma on March, 18 2018
High Precision Live Sky Chart
12h 04m 18s
+24° 39’ 08”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet C/2018 A3 (ATLAS) Rise and Set Times

Today's Comet C/2018 A3 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 65.3°
Max altitude: 63.2°
Azimuth: 294.7°

Comet C/2018 A3 (ATLAS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 A3 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 A3 (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 A3 (ATLAS)
View Comet C/2018 A3 (ATLAS) in the 3D Solar System Simulator

Comet C/2018 A3 (ATLAS) Ephemeris

The following table lists the ephemerides of Comet C/2018 A3 (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 A3 (ATLAS) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Mar 11 17.53 12h 14m 45s +22° 39’ 01” Coma
2018 Mar 12 17.52 12h 13m 19s +22° 56’ 29” Coma
2018 Mar 13 17.51 12h 11m 52s +23° 13’ 50” Coma
2018 Mar 14 17.50 12h 10m 23s +23° 31’ 09” Coma
2018 Mar 15 17.49 12h 08m 53s +23° 48’ 20” Coma
2018 Mar 16 17.48 12h 07m 23s +24° 05’ 23” Coma
2018 Mar 17 17.47 12h 05m 52s +24° 22’ 19” Coma
2018 Mar 18 17.47 12h 04m 18s +24° 39’ 08” Coma
2018 Mar 19 17.46 12h 02m 47s +24° 55’ 47” Coma
2018 Mar 20 17.45 12h 01m 13s +25° 12’ 19” Coma
2018 Mar 21 17.44 11h 59m 39s +25° 28’ 38” Coma
2018 Mar 22 17.44 11h 58m 05s +25° 44’ 48” Leo
2018 Mar 23 17.43 11h 56m 30s +26° 00’ 47” Leo
2018 Mar 24 17.42 11h 54m 55s +26° 16’ 36” Leo

Distance of Comet C/2018 A3 (ATLAS) from Earth

The following chart shows the distance of Comet C/2018 A3 (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 A3 (ATLAS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2018 A3 (ATLAS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2018 A3 (ATLAS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2018 A3 (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 A3 (ATLAS) between January 2013 and December 2075

Comet C/2018 A3 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2018 A3 (ATLAS) at epoch 15 January 2018 00:00 UTC (JD: 2458134.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00000000
Orbit inclination i 139.57589319°
Perihelion distance q 3.27836244 AU
490,436,041 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2019-Jan-11 20:55:12
2,458,495.3717 JD
Argument of perihelion peri 86.311679470532°
Longitude of the ascending node node 194.29373828374°
Mean anomaly M °
Mean motion n 0.00000000°/day
Closest approach to Earth* 2019-Jan-10
Distance of closest approach* 2.60674751 AU
389,963,878 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.