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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:47  
clear_day Transit: 12:56  
SunsetSet: 21:06 south
sunny DaytimeWhat's Visible Now
Comets » 

Comet C/2019 T4 (ATLAS)

Comet C/2019 T4 (ATLAS) is currently in the constellation of Serpens.

The current Right Ascension of Comet C/2019 T4 (ATLAS) is 15h 19m 30s and the Declination is +21° 22’ 43” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current estimated magnitude of Comet C/2019 T4 (ATLAS) is 14.74 (JPL) while the latest observed magnitude is 14.3 (COBS).

15h 19m 30s
+21° 22’ 43”

The observed values of Magnitude, Coma Diameter and Tail Length are derived from the most recent observation recorded at the Comet Observers Database. The value of Predicted Magnitude comes from the JPL Horizons ephemerides service and, in the case of comets, might be inaccurate given the highly dynamic and unpredictable behavior of these objects. When available, please refer to the Observed Magnitude value and consider the Predicted 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.

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

Azimuth: 68.6°
Max altitude: 59.9°
Azimuth: 291.4°
  • C/2019 T4 (ATLAS) is above the horizon from Greenwich, United Kingdom edit_location_alt.
  • Right now it is placed in the East-North-East direction at an altitude of 9° above the horizon.
  • Given its current magnitude, C/2019 T4 (ATLAS) is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.
  • 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.

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.

Finder chart of C/2019 T4 (ATLAS) in Serpens on June,03 2023
Map showing Comet C/2019 T4 (ATLAS) in Serpens on June, 03 2023
Field of view: 50x30 degrees
View fullscreen
Finder chart of C/2019 T4 (ATLAS)
Map showing Comet C/2019 T4 (ATLAS) in Serpens on June, 03 2023
Field of view: 10x6 degrees
View fullscreen

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: 15h 19m 30s
Dec: +21° 22’ 43”
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 663,044,225 kilometers, equivalent to 4.432177 Astronomical Units. Light takes 36 minutes and 51.6775 seconds to travel from Comet C/2019 T4 (ATLAS) and arrive to us.

36 minutes and 51.6775 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.

Chart of the distance of Comet C/2019 T4 (ATLAS) from Earth in Astronomical Units (au)

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 1 January 2013 and 30 December 2100, the closest approach of Comet C/2019 T4 (ATLAS) to Earth happens on Tue Apr 5 2022 at a distance of 3.330822 Astronomical Units, or 498,283,815 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 and Light Curve

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.

Chart of the magnitude of Comet C/2019 T4 (ATLAS) as a function of time

Comet C/2019 T4 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2019 T4 (ATLAS) at epoch 29 September 2021 00:00 UTC (JD: 2459487.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99581888
Orbit inclination i 53.62366851°
Perihelion distance q 4.24220218 AU
634,624,414 km
Aphelion distance Q 2,024.97490674 AU
302,931,934,877 km
Semi-major axis a 1,014.60855446 AU
151,783,279,646 km
Orbital period period 32,318.8562 years
11,804,462.2146 days
Date of perihelion transit Tp 2022-Jun-09 05:24:06
2,459,739.7251 JD
Next perihelion transit 34341-Dec-16 10:33
14,264,201.9397 JD
Argument of perihelion peri 351.2136087001°
Longitude of the ascending node node 199.942605267°
Mean anomaly M 359.99230790647°
Mean motion n 0.00003050°/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
2023 May 27 15h 22m 35s +20° 55’ 01” 14.67 Serpens
2023 May 28 15h 22m 09s +20° 59’ 13” 14.68 Serpens
2023 May 29 15h 21m 43s +21° 03’ 15” 14.69 Serpens
2023 May 30 15h 21m 20s +21° 07’ 05” 14.70 Serpens
2023 May 31 15h 20m 56s +21° 10’ 45” 14.71 Serpens
2023 Jun 01 15h 20m 31s +21° 14’ 17” 14.72 Serpens
2023 Jun 02 15h 20m 08s +21° 17’ 36” 14.72 Serpens
2023 Jun 03 15h 19m 45s +21° 20’ 47” 14.73 Serpens
2023 Jun 04 15h 19m 22s +21° 23’ 47” 14.74 Serpens
2023 Jun 05 15h 19m 00s +21° 26’ 38” 14.75 Serpens
2023 Jun 06 15h 18m 38s +21° 29’ 17” 14.76 Serpens
2023 Jun 07 15h 18m 16s +21° 31’ 49” 14.77 Serpens
2023 Jun 08 15h 17m 56s +21° 34’ 09” 14.78 Serpens
2023 Jun 09 15h 17m 35s +21° 36’ 20” 14.79 Serpens