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🌎  Greenwich, United Kingdom [change]

Comet C/2019 T4 (ATLAS)

Comet C/2019 T4 (ATLAS) is currently in the constellation of Hydra. The current Right Ascension of Comet C/2019 T4 (ATLAS) is 12h 07m 54s and the Declination is -29° 34’ 08” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 T4 (ATLAS) is 14.02 (JPL) while the latest observed magnitude is 13.0 (COBS).

Summary of key facts about Comet C/2019 T4 (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]:

12h 07m 54s
-29° 34’ 08”

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 T4 (ATLAS) available on TheSkyLive:

Available Resources

Comet C/2019 T4 (ATLAS) Position and Finder Charts

Below we provide Comet C/2019 T4 (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 T4 (ATLAS) in Hydra on January, 26 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2019 T4 (ATLAS) in Hydra on January, 26 2022
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 T4 (ATLAS) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2019 T4 (ATLAS)
RA: 12h 07m 54s
Dec: -29° 34’ 08”
Deep sky finder chart for Comet C/2019 T4 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2019 T4 (ATLAS)?, a page that provides all the information needed to find Comet C/2019 T4 (ATLAS) in the sky and additional links to sky charts.

Comet C/2019 T4 (ATLAS) Distance from Earth

The distance of Comet C/2019 T4 (ATLAS) from Earth is currently 591,230,642 kilometers, equivalent to 3.952133 Astronomical Units. Light takes 32 minutes and 52.1331 seconds to travel from Comet C/2019 T4 (ATLAS) and arrive to us.

32 minutes and 52.1331 seconds

The following chart shows the distance of Comet C/2019 T4 (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 T4 (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 T4 (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 T4 (ATLAS) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2019 T4 (ATLAS) to Earth happens on Tue Apr 5 2022 at a distance of 3.330829 Astronomical Units, or 498,284,925 kilometers:

Tue Apr 5 2022

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

Comet C/2019 T4 (ATLAS) brightness

The current visual magnitude of Comet C/2019 T4 (ATLAS) is 14.02.


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 T4 (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 T4 (ATLAS) between January 2013 and December 2100

Comet C/2019 T4 (ATLAS) rise and set times

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

Today's Comet C/2019 T4 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 119.6°
Max altitude: 8.9°
Azimuth: 240.4°

The rise and set times are defined as the time at which the upper limb of Comet C/2019 T4 (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 T4 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2019 T4 (ATLAS) at epoch 12 October 2020 00:00 UTC (JD: 2459135.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99594965
Orbit inclination i 53.61710203°
Perihelion distance q 4.24161345 AU
634,536,342 km
Aphelion distance Q 2,090.20335714 AU
312,689,972,185 km
Semi-major axis a 1,047.22248529 AU
156,662,254,263 km
Orbital period period 33,889.6154 years
12,378,182.0203 days
Date of perihelion transit Tp 2022-Jun-09 06:24:00
2,459,739.7667 JD
Argument of perihelion peri 351.21641964591°
Longitude of the ascending node node 199.96065502506°
Mean anomaly M 359.98242585218°
Mean motion n 0.00002908°/day

Visualization of Comet C/2019 T4 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2019 T4 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2019 T4 (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 T4 (ATLAS)
View Comet C/2019 T4 (ATLAS) in the 3D Solar System Simulator

Comet C/2019 T4 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2019 T4 (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 T4 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2022 Jan 19 12h 06m 47s -29° 41’ 39” 14.10 Hydra
2022 Jan 20 12h 06m 57s -29° 41’ 12” 14.09 Hydra
2022 Jan 21 12h 07m 09s -29° 40’ 36” 14.08 Hydra
2022 Jan 22 12h 07m 18s -29° 39’ 52” 14.07 Hydra
2022 Jan 23 12h 07m 27s -29° 38’ 59” 14.06 Hydra
2022 Jan 24 12h 07m 36s -29° 37’ 59” 14.05 Hydra
2022 Jan 25 12h 07m 42s -29° 36’ 47” 14.04 Hydra
2022 Jan 26 12h 07m 50s -29° 35’ 27” 14.03 Hydra
2022 Jan 27 12h 07m 54s -29° 33’ 57” 14.02 Hydra
2022 Jan 28 12h 07m 59s -29° 32’ 18” 14.01 Hydra
2022 Jan 29 12h 08m 03s -29° 30’ 29” 14.00 Hydra
2022 Jan 30 12h 08m 05s -29° 28’ 32” 13.99 Hydra
2022 Jan 31 12h 08m 08s -29° 26’ 22” 13.98 Hydra
2022 Feb 01 12h 08m 08s -29° 24’ 03” 13.97 Hydra