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Comet C/2017 K4 (ATLAS)

Available Resources

Comet C/2017 K4 (ATLAS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 K4 (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 K4 (ATLAS) in Aquarius on February, 24 2018
High Precision Live Sky Chart
21h 58m 32s
-05° 58’ 04”
 = 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 K4 (ATLAS) Rise and Set Times

Today's Comet C/2017 K4 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 96.0°
Max altitude: 32.6°
Azimuth: 264.0°

Comet C/2017 K4 (ATLAS) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 K4 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 K4 (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 K4 (ATLAS)
View Comet C/2017 K4 (ATLAS) in the 3D Solar System Simulator

Comet C/2017 K4 (ATLAS) Ephemeris

The following table lists the ephemerides of Comet C/2017 K4 (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 K4 (ATLAS) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Feb 17 16.01 21h 46m 08s -07° 31’ 05” Aquarius
2018 Feb 18 16.01 21h 47m 54s -07° 17’ 56” Aquarius
2018 Feb 19 16.02 21h 49m 41s -07° 04’ 42” Aquarius
2018 Feb 20 16.02 21h 51m 28s -06° 51’ 26” Aquarius
2018 Feb 21 16.02 21h 53m 14s -06° 38’ 09” Aquarius
2018 Feb 22 16.03 21h 55m 00s -06° 24’ 50” Aquarius
2018 Feb 23 16.03 21h 56m 47s -06° 11’ 27” Aquarius
2018 Feb 24 16.04 21h 58m 32s -05° 58’ 04” Aquarius
2018 Feb 25 16.04 22h 00m 17s -05° 44’ 38” Aquarius
2018 Feb 26 16.05 22h 02m 03s -05° 31’ 10” Aquarius
2018 Feb 27 16.05 22h 03m 47s -05° 17’ 40” Aquarius
2018 Feb 28 16.05 22h 05m 31s -05° 04’ 09” Aquarius
2018 Mar 01 16.06 22h 07m 15s -04° 50’ 35” Aquarius
2018 Mar 02 16.06 22h 08m 59s -04° 37’ 01” Aquarius

Distance of Comet C/2017 K4 (ATLAS) from Earth

The following chart shows the distance of Comet C/2017 K4 (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 K4 (ATLAS) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 K4 (ATLAS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 K4 (ATLAS)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 K4 (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 K4 (ATLAS) between January 2013 and December 2075

Comet C/2017 K4 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 K4 (ATLAS) at epoch 07 July 2017 00:00 UTC (JD: 2457942.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.90577219
Orbit inclination i 16.67850771°
Perihelion distance q 2.64817742 AU
396,161,704 km
Aphelion distance Q 53.55980494 AU
8,012,432,791 km
Semi-major axis a 28.10399118 AU
4,204,297,247 km
Orbital period period 148.9900 years
54,418.9838 days
Date of perihelion transit Tp 2018-Jan-08 00:14:10
2,458,126.5098 JD
Next perihelion transit 2167-Jan-05 23:50
2,512,545.4936 JD
Argument of perihelion peri 15.099803514614°
Longitude of the ascending node node 298.89912448144°
Mean anomaly M 358.78271258601°
Mean motion n 0.00661534°/day
Closest approach to Earth* 2017-Jul-03
Distance of closest approach* 2.31071768 AU
345,678,446 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.