The Solar System at your Fingertips
Comets » 

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 Pisces on May, 26 2018
High Precision Live Sky Chart
00h 16m 13s
+14° 39’ 15”
 = 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: 75.3°
Max altitude: 53.2°
Azimuth: 284.7°

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
2018 May 19 16.45 00h 07m 35s +13° 10’ 00” Pisces
2018 May 20 16.46 00h 08m 49s +13° 22’ 51” Pegasus
2018 May 21 16.47 00h 10m 05s +13° 35’ 43” Pegasus
2018 May 22 16.47 00h 11m 20s +13° 48’ 29” Pegasus
2018 May 23 16.48 00h 12m 33s +14° 01’ 15” Pegasus
2018 May 24 16.48 00h 13m 48s +14° 13’ 58” Pegasus
2018 May 25 16.49 00h 15m 01s +14° 26’ 38” Pisces
2018 May 26 16.50 00h 16m 13s +14° 39’ 15” Pisces
2018 May 27 16.50 00h 17m 25s +14° 51’ 51” Pisces
2018 May 28 16.51 00h 18m 37s +15° 04’ 23” Pisces
2018 May 29 16.52 00h 19m 48s +15° 16’ 51” Pisces
2018 May 30 16.52 00h 20m 57s +15° 29’ 18” Pisces
2018 May 31 16.53 00h 22m 08s +15° 41’ 43” Pisces
2018 Jun 01 16.53 00h 23m 17s +15° 54’ 05” Pisces

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 08 July 2017 00:00 UTC (JD: 2457943.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.90577320
Orbit inclination i 16.67851477°
Perihelion distance q 2.64817439 AU
396,161,250 km
Aphelion distance Q 53.56034340 AU
8,012,513,343 km
Semi-major axis a 28.10425889 AU
4,204,337,297 km
Orbital period period 148.9900 years
54,419.7614 days
Date of perihelion transit Tp 2018-Jan-08 00:14:42
2,458,126.5102 JD
Next perihelion transit 2167-Jan-06 18:31
2,512,546.2716 JD
Argument of perihelion peri 15.099966213211°
Longitude of the ascending node node 298.89911413678°
Mean anomaly M 358.78934274944°
Mean motion n 0.00661524°/day
Closest approach to Earth* 2017-Jul-03
Distance of closest approach* 2.31071840 AU
345,678,554 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.