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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2019 T3 (ATLAS)

Comet C/2019 T3 (ATLAS) is currently in the constellation of Cepheus. The current Right Ascension of Comet C/2019 T3 (ATLAS) is 22h 22m 27s and the Declination is +67° 15’ 52” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 T3 (ATLAS) is 17.53 (JPL) while the latest observed magnitude is 17.0 (COBS).

Summary of key facts about Comet C/2019 T3 (ATLAS) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

22h 22m 27s
+67° 15’ 52”
  • C/2019 T3 (ATLAS) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the North-West direction at an altitude of 56° above the horizon.
  • Given its current magnitude, C/2019 T3 (ATLAS) is visible only through long exposure photography.
  • See also C/2019 T3 (ATLAS) rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Comet C/2019 T3 (ATLAS) available on TheSkyLive:

Available Resources

Comet C/2019 T3 (ATLAS) Position and Finder Charts

Below we provide Comet C/2019 T3 (ATLAS) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet C/2019 T3 (ATLAS) in Cepheus on October, 23 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2019 T3 (ATLAS) in Cepheus on October, 23 2020
Field of view: 10x6 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, 60 arcmin wide, showing where Comet C/2019 T3 (ATLAS) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2019 T3 (ATLAS)
RA: 22h 22m 27s
Dec: +67° 15’ 52”
Deep sky finder chart for Comet C/2019 T3 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2019 T3 (ATLAS)?, a page that provides all the information needed to find Comet C/2019 T3 (ATLAS) in the sky and additional links to sky charts.

Comet C/2019 T3 (ATLAS) Distance from Earth

The distance of Comet C/2019 T3 (ATLAS) from Earth is currently 828,157,971 kilometers, equivalent to 5.535894 Astronomical Units. Light takes 46 minutes and 2.4376 seconds to travel from Comet C/2019 T3 (ATLAS) and arrive to us.

46 minutes and 2.4376 seconds

The following chart shows the distance of Comet C/2019 T3 (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 T3 (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 T3 (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 T3 (ATLAS) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2019 T3 (ATLAS) to Earth happens on Sat Sep 11 2021 at a distance of 5.370821 Astronomical Units, or 803,463,436 kilometers:

Sat Sep 11 2021

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

Comet C/2019 T3 (ATLAS) brightness

The current visual magnitude of Comet C/2019 T3 (ATLAS) is 17.53.


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 T3 (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 T3 (ATLAS) between January 2013 and December 2100

Comet C/2019 T3 (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 T3 (ATLAS) is circumpolar and transits at 20:11 UTC (altitude: 74.2°)

The rise and set times are defined as the time at which the upper limb of Comet C/2019 T3 (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 T3 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2019 T3 (ATLAS) at epoch 18 February 2020 00:00 UTC (JD: 2458898.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99933104
Orbit inclination i 121.86218592°
Perihelion distance q 5.94674505 AU
889,620,398 km
Aphelion distance Q 17,773.04866492 AU
2,658,810,241,451 km
Semi-major axis a 8,889.49770498 AU
1,329,849,930,925 km
Orbital period period 838,154.4100 years
306,135,899.0037 days
Date of perihelion transit Tp 2021-Mar-02 09:30:04
2,459,275.8959 JD
Argument of perihelion peri 112.24720767582°
Longitude of the ascending node node 139.51250562915°
Mean anomaly M 359.99955620193°
Mean motion n 0.00000118°/day

Visualization of Comet C/2019 T3 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2019 T3 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2019 T3 (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 T3 (ATLAS)
View Comet C/2019 T3 (ATLAS) in the 3D Solar System Simulator

Comet C/2019 T3 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2019 T3 (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 T3 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Oct 16 22h 32m 18s +68° 58’ 18” 17.54 Cepheus
2020 Oct 17 22h 30m 44s +68° 44’ 12” 17.54 Cepheus
2020 Oct 18 22h 29m 15s +68° 29’ 57” 17.53 Cepheus
2020 Oct 19 22h 27m 47s +68° 15’ 30” 17.53 Cepheus
2020 Oct 20 22h 26m 22s +68° 00’ 55” 17.53 Cepheus
2020 Oct 21 22h 25m 01s +67° 46’ 09” 17.53 Cepheus
2020 Oct 22 22h 23m 44s +67° 31’ 15” 17.53 Cepheus
2020 Oct 23 22h 22m 28s +67° 16’ 13” 17.53 Cepheus
2020 Oct 24 22h 21m 16s +67° 01’ 02” 17.52 Cepheus
2020 Oct 25 22h 20m 08s +66° 45’ 45” 17.52 Cepheus
2020 Oct 26 22h 19m 01s +66° 30’ 20” 17.52 Cepheus
2020 Oct 27 22h 17m 58s +66° 14’ 48” 17.52 Cepheus
2020 Oct 28 22h 16m 58s +65° 59’ 11” 17.52 Cepheus
2020 Oct 29 22h 16m 00s +65° 43’ 27” 17.52 Cepheus