Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]
Comets » 

Comet C/2019 Y4 (ATLAS)

Available Resources

Comet C/2019 Y4 (ATLAS) Position

Comet C/2019 Y4 (ATLAS) is currently in the constellation of Camelopardalis. The current Right Ascension is 07h 58m 50s and the Declination is +68° 32’ 26”.

07h 58m 50s
+68° 32’ 26”

Simplified sky chart showing where Comet C/2019 Y4 (ATLAS) is right now in the sky with respect to the brightest stars and constellations (see full screen Online Planetarium)

Map showing Comet C/2019 Y4 (ATLAS) in Camelopardalis on March, 31 2020
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart showing where Comet C/2019 Y4 (ATLAS) is right now (view fullscreen)

C/2019 Y4 (ATLAS)
RA: 07h 58m 50s
Dec: +68° 32’ 26”
Deep sky finder chart for Comet C/2019 Y4 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2019 Y4 (ATLAS)?, a page that provides all the information needed to find Comet C/2019 Y4 (ATLAS) in the sky and additional links to sky charts.

Comet C/2019 Y4 (ATLAS) Distance

The distance of Comet C/2019 Y4 (ATLAS) from Earth is currently 156,652,838 kilometers, equivalent to 1.047160 Astronomical Units. Light takes 8 minutes and 42.5376 seconds to travel from Comet C/2019 Y4 (ATLAS) and arrive to us.

8 minutes and 42.5376 seconds

The following chart shows the distance of Comet C/2019 Y4 (ATLAS) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet C/2019 Y4 (ATLAS) from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2019 Y4 (ATLAS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2019 Y4 (ATLAS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2019 Y4 (ATLAS) to Earth happens on Sat May 23 2020 at a distance of 0.78113215 Astronomical Units, or 116,855,706 kilometers:

Sat May 23 2020

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2019 Y4 (ATLAS) brightness

The current visual magnitude of Comet C/2019 Y4 (ATLAS) is 14.00.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behavior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2019 Y4 (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/2019 Y4 (ATLAS) between January 2013 and December 2100

Comet C/2019 Y4 (ATLAS) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Comet C/2019 Y4 (ATLAS) is circumpolar and transits at 19:20 UTC (altitude: 72.9°)

The rise and set times are defined as the time at which the upper limb of Comet C/2019 Y4 (ATLAS) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2019 Y4 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2019 Y4 (ATLAS) at epoch 06 January 2020 00:00 UTC (JD: 2458855.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99918576
Orbit inclination i 45.38215216°
Perihelion distance q 0.25296084 AU
37,842,404 km
Aphelion distance Q 621.08998292 AU
92,913,739,144 km
Semi-major axis a 310.67147188 AU
46,475,790,774 km
Orbital period period 5,475.9600 years
2,000,094.3792 days
Date of perihelion transit Tp 2020-May-31 00:51:39
2,459,000.5359 JD
Argument of perihelion peri 177.40492204468°
Longitude of the ascending node node 120.57022297204°
Mean anomaly M 359.97389477427°
Mean motion n 0.00017999°/day

Visualization of Comet C/2019 Y4 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2019 Y4 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2019 Y4 (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/2019 Y4 (ATLAS)
View Comet C/2019 Y4 (ATLAS) in the 3D Solar System Simulator

Comet C/2019 Y4 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2019 Y4 (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/2019 Y4 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Mar 24 08h 53m 57s +68° 05’ 05” 14.51 Ursa Major
2020 Mar 25 08h 46m 32s +68° 13’ 51” 14.45 Ursa Major
2020 Mar 26 08h 39m 02s +68° 20’ 59” 14.38 Ursa Major
2020 Mar 27 08h 31m 32s +68° 26’ 31” 14.31 Ursa Major
2020 Mar 28 08h 24m 03s +68° 30’ 29” 14.25 Ursa Major
2020 Mar 29 08h 16m 36s +68° 32’ 52” 14.18 Ursa Major
2020 Mar 30 08h 09m 11s +68° 33’ 43” 14.11 Camelopardalis
2020 Mar 31 08h 01m 50s +68° 33’ 06” 14.03 Camelopardalis
2020 Apr 01 07h 54m 33s +68° 31’ 02” 13.96 Camelopardalis
2020 Apr 02 07h 47m 22s +68° 27’ 35” 13.89 Camelopardalis
2020 Apr 03 07h 40m 19s +68° 22’ 49” 13.81 Camelopardalis
2020 Apr 04 07h 33m 24s +68° 16’ 45” 13.74 Camelopardalis
2020 Apr 05 07h 26m 35s +68° 09’ 26” 13.66 Camelopardalis
2020 Apr 06 07h 19m 56s +68° 00’ 59” 13.58 Camelopardalis