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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 Cygnus on February, 24 2018
High Precision Live Sky Chart
19h 33m 10s
+38° 53’ 16”
 = 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 09:16 UTC (altitude: 77.4°)

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 Feb 17 16.32 19h 30m 03s +38° 39’ 33” Cygnus
2018 Feb 18 16.31 19h 30m 32s +38° 41’ 07” Cygnus
2018 Feb 19 16.29 19h 31m 00s +38° 42’ 48” Cygnus
2018 Feb 20 16.28 19h 31m 27s +38° 44’ 38” Cygnus
2018 Feb 21 16.27 19h 31m 54s +38° 46’ 36” Cygnus
2018 Feb 22 16.26 19h 32m 20s +38° 48’ 41” Cygnus
2018 Feb 23 16.25 19h 32m 45s +38° 50’ 54” Cygnus
2018 Feb 24 16.24 19h 33m 10s +38° 53’ 16” Cygnus
2018 Feb 25 16.23 19h 33m 34s +38° 55’ 44” Cygnus
2018 Feb 26 16.22 19h 33m 57s +38° 58’ 19” Cygnus
2018 Feb 27 16.21 19h 34m 21s +39° 01’ 04” Cygnus
2018 Feb 28 16.20 19h 34m 44s +39° 03’ 55” Cygnus
2018 Mar 01 16.19 19h 35m 04s +39° 06’ 54” Cygnus
2018 Mar 02 16.17 19h 35m 26s +39° 10’ 00” Cygnus

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 09 September 2017 00:00 UTC (JD: 2458006.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00113421
Orbit inclination i 105.65766476°
Perihelion distance q 3.25223720 AU
486,527,762 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 06:49:30
2,458,501.7844 JD
Argument of perihelion peri 167.6349907007°
Longitude of the ascending node node 65.864337528455°
Mean anomaly M -0.0031792567828593°
Mean motion n 0.00000642°/day
Closest approach to Earth* 2019-May-14
Distance of closest approach* 2.48062872 AU
371,096,775 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.