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Comet C/2017 M4 (ATLAS)

Available Resources

Comet C/2017 M4 (ATLAS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 M4 (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/2017 M4 (ATLAS) in Lyra on May, 21 2018
High Precision Live Sky Chart
18h 58m 08s
+46° 23’ 27”
 = 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/2017 M4 (ATLAS) Rise and Set Times

Comet C/2017 M4 (ATLAS) is circumpolar from Greenwich, United Kingdom [change] and transits at 03:03 UTC (altitude: 84.9°)

Comet C/2017 M4 (ATLAS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 M4 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 M4 (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/2017 M4 (ATLAS)
View Comet C/2017 M4 (ATLAS) in the 3D Solar System Simulator

Comet C/2017 M4 (ATLAS) Ephemeris

The following table lists the ephemerides of Comet C/2017 M4 (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/2017 M4 (ATLAS) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 May 14 15.19 19h 08m 38s +45° 57’ 14” Lyra
2018 May 15 15.18 19h 07m 14s +46° 01’ 36” Lyra
2018 May 16 15.16 19h 05m 48s +46° 05’ 48” Lyra
2018 May 17 15.15 19h 04m 19s +46° 09’ 47” Lyra
2018 May 18 15.13 19h 02m 49s +46° 13’ 32” Lyra
2018 May 19 15.12 19h 01m 18s +46° 17’ 04” Lyra
2018 May 20 15.10 18h 59m 44s +46° 20’ 24” Lyra
2018 May 21 15.09 18h 58m 08s +46° 23’ 27” Lyra
2018 May 22 15.08 18h 56m 30s +46° 26’ 16” Lyra
2018 May 23 15.06 18h 54m 50s +46° 28’ 49” Lyra
2018 May 24 15.05 18h 53m 08s +46° 31’ 05” Lyra
2018 May 25 15.03 18h 51m 24s +46° 33’ 06” Lyra
2018 May 26 15.02 18h 49m 39s +46° 34’ 47” Lyra
2018 May 27 15.01 18h 47m 52s +46° 36’ 11” Lyra

Distance of Comet C/2017 M4 (ATLAS) from Earth

The following chart shows the distance of Comet C/2017 M4 (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/2017 M4 (ATLAS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 M4 (ATLAS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 M4 (ATLAS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 M4 (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/2017 M4 (ATLAS) between January 2013 and December 2075

Comet C/2017 M4 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 M4 (ATLAS) at epoch 24 September 2017 00:00 UTC (JD: 2458021.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00113110
Orbit inclination i 105.65765603°
Perihelion distance q 3.25225939 AU
486,531,080 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2019-Jan-18 06:52:49
2,458,501.7867 JD
Argument of perihelion peri 167.63488406455°
Longitude of the ascending node node 65.864716153135°
Mean anomaly M -0.0030702842715355°
Mean motion n 0.00000639°/day
Closest approach to Earth* 2019-May-14
Distance of closest approach* 2.48067633 AU
371,103,898 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.