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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 Sagittarius on November, 24 2017
High Precision Live Sky Chart
19h 05m 53s
-22° 20’ 09”
 = 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: 112.3°
Max altitude: 16.2°
Azimuth: 247.7°

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
2017 Nov 17 15.81 18h 52m 53s -23° 08’ 53” Sagittarius
2017 Nov 18 15.81 18h 54m 43s -23° 02’ 08” Sagittarius
2017 Nov 19 15.81 18h 56m 35s -22° 55’ 19” Sagittarius
2017 Nov 20 15.81 18h 58m 26s -22° 48’ 27” Sagittarius
2017 Nov 21 15.81 19h 00m 16s -22° 41’ 29” Sagittarius
2017 Nov 22 15.81 19h 02m 08s -22° 34’ 27” Sagittarius
2017 Nov 23 15.81 19h 04m 00s -22° 27’ 20” Sagittarius
2017 Nov 24 15.81 19h 05m 53s -22° 20’ 09” Sagittarius
2017 Nov 25 15.81 19h 07m 45s -22° 12’ 55” Sagittarius
2017 Nov 26 15.81 19h 09m 38s -22° 05’ 35” Sagittarius
2017 Nov 27 15.81 19h 11m 30s -21° 58’ 10” Sagittarius
2017 Nov 28 15.81 19h 13m 23s -21° 50’ 41” Sagittarius
2017 Nov 29 15.81 19h 15m 16s -21° 43’ 08” Sagittarius
2017 Nov 30 15.81 19h 17m 09s -21° 35’ 30” Sagittarius

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 25 June 2017 00:00 UTC (JD: 2457930.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.90571750
Orbit inclination i 16.67822188°
Perihelion distance q 2.64824335 AU
396,171,568 km
Aphelion distance Q 53.52853267 AU
8,007,754,525 km
Semi-major axis a 28.08838801 AU
4,201,963,046 km
Orbital period period 148.8700 years
54,373.6704 days
Date of perihelion transit Tp 2018-Jan-08 00:08:08
2,458,126.5057 JD
Argument of perihelion peri 15.096433281712°
Longitude of the ascending node node 298.8997961573°
Mean anomaly M 358.70227564742°
Mean motion n 0.00662085°/day
Closest approach to Earth* 2017-Jul-03
Distance of closest approach* 2.31070422 AU
345,676,431 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.