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Comets » 

Comet C/2019 T4 (ATLAS)

Below the horizon.  Rise: 0:51 | Tran: 9:20 | Set: 17:49
Alt: -6.80°   Az: 329.53°   Direction: North-North-West

Comet C/2019 T4 (ATLAS) is in the constellation of Hercules, at a distance of 1,354,017,473.0 kilometers from Earth. The current Right Ascension is 18h 39m 20s and the Declination is +26° 07’ 34” (apparent coordinates). The latest observed magnitude of Comet C/2019 T4 (ATLAS) is 18.3 (data provided by COBS).

Finder Charts

Map showing Comet C/2019 T4 (ATLAS) in Hercules on February, 09 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Comet C/2019 T4 (ATLAS) in Hercules on February, 09 2025. Field of view: 15x9 degrees. View in interactive sky chart

High 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: 18h 38m 19s
Dec: +26° 06’ 10”
Deep sky finder chart for Comet C/2019 T4 (ATLAS). Field of view: 60x40 arcmins. View in deep sky object tracker

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.

Celestial Coordinates

Apparent

18h 39m 20s
+26° 07’ 34”
09h 43m 32s
04h 22m 53s

J2000

18h 38m 19s
+26° 06’ 10”

Additional Information

Hercules
18.3
0.4'
n/a
2025-02-04
18.75

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.

Rise and Set Times

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

Azimuth: 63.9°
Max altitude: 64.6°
Azimuth: 296.1°
  • C/2019 T4 (ATLAS) is below the horizon from Greenwich, UK.
  • Given its current magnitude, C/2019 T4 (ATLAS) is visible only through long exposure photography.
  • 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.

Distance from Earth

The distance of Comet C/2019 T4 (ATLAS) from Earth is currently 1,354,017,473.0 kilometers, equivalent to 9.0510477633 Astronomical Units. Light takes 1h 15m 16.516s to travel from Comet C/2019 T4 (ATLAS) and arrive to us.

1,354,017,473.0
9.0510477633
1h 15m 16.516s

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

Between 1 January 2000 and 31 December 2099, the closest approach of Comet C/2019 T4 (ATLAS) to Earth happens on Tue Apr 5 2022 at a distance of 3.330828 Astronomical Units, or 498,284,704 kilometers:

Tue Apr 5 2022
498,284,704
3.330828

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

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

Orbital Elements

The following table lists the orbital elements of Comet C/2019 T4 (ATLAS) at epoch 12 February 2023 00:00 UTC (JD: 2459988.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99562179
Orbit inclination i 53.63216393°
Perihelion distance q 4.24214992 AU
634,616,597 km
Aphelion distance Q 1,933.60512533 AU
289,263,210,104 km
Semi-major axis a 968.92363763 AU
144,948,913,350 km
Orbital period period 30,160.7772 years
11,016,223.8785 days
Date of perihelion transit Tp 2022-Jun-08 23:45:27
2,459,739.4899 JD
Next perihelion transit 32183-Oct-31 20:50
13,475,963.3684 JD
Argument of perihelion peri 351.17755682489°
Longitude of the ascending node node 199.93925252099°
Mean anomaly M 0.0081374197204644°
Mean motion n 0.00003268°/day

Orbit Visualization

Orbit Diagram of Comet C/2019 T4 (ATLAS)
View Comet C/2019 T4 (ATLAS) in the 3D Solar System Simulator

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. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 Feb 02 18h 35m 11s +25° 37’ 03” 18.73 Hercules
2025 Feb 03 18h 35m 44s +25° 40’ 47” 18.73 Hercules
2025 Feb 04 18h 36m 17s +25° 44’ 33” 18.74 Hercules
2025 Feb 05 18h 36m 49s +25° 48’ 23” 18.74 Hercules
2025 Feb 06 18h 37m 21s +25° 52’ 17” 18.74 Hercules
2025 Feb 07 18h 37m 53s +25° 56’ 14” 18.74 Hercules
2025 Feb 08 18h 38m 25s +26° 00’ 14” 18.75 Hercules
2025 Feb 09 18h 38m 56s +26° 04’ 19” 18.75 Hercules
2025 Feb 10 18h 39m 26s +26° 08’ 26” 18.75 Lyra
2025 Feb 11 18h 39m 57s +26° 12’ 36” 18.76 Lyra
2025 Feb 12 18h 40m 27s +26° 16’ 50” 18.76 Lyra
2025 Feb 13 18h 40m 57s +26° 21’ 07” 18.76 Lyra
2025 Feb 14 18h 41m 27s +26° 25’ 27” 18.77 Lyra
2025 Feb 15 18h 41m 56s +26° 29’ 50” 18.77 Lyra

Additional Resources