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 11h 09m 23s and the Declination is -25° 40’ 03” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 T4 (ATLAS) is 14.95 (JPL) while the latest observed magnitude is 13.8 (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]:

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Additional information about Comet C/2019 T4 (ATLAS) available on TheSkyLive:

Available Resources

• Position and finder charts (see also Where is Comet C/2019 T4 (ATLAS)?)
• Distance from Earth (see also How far is Comet C/2019 T4 (ATLAS) from Earth?)
• Rise and set times (see also When does Comet C/2019 T4 (ATLAS) rise and set?)
• Brightness (see also How bright is Comet C/2019 T4 (ATLAS)?)
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet C/2019 T4 (ATLAS) for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet C/2019 T4 (ATLAS) in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet C/2019 T4 (ATLAS) with your telescope or on your astrophotographies.

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.

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 794,855,945 kilometers, equivalent to 5.313284 Astronomical Units. Light takes 44 minutes and 11.3540 seconds to travel from Comet C/2019 T4 (ATLAS) and arrive to us.

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.

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 3.330836 Astronomical Units, or 498,285,978 kilometers:

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 14.95.

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.

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

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):

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) 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
2021 Oct 19	11h 01m 41s	-25° 10’ 10”	15.00	Crater
2021 Oct 20	11h 02m 43s	-25° 14’ 05”	15.00	Hydra
2021 Oct 21	11h 03m 44s	-25° 18’ 02”	14.99	Hydra
2021 Oct 22	11h 04m 46s	-25° 21’ 59”	14.99	Hydra
2021 Oct 23	11h 05m 48s	-25° 25’ 55”	14.98	Hydra
2021 Oct 24	11h 06m 48s	-25° 29’ 54”	14.97	Hydra
2021 Oct 25	11h 07m 50s	-25° 33’ 54”	14.97	Hydra
2021 Oct 26	11h 08m 51s	-25° 37’ 54”	14.96	Hydra
2021 Oct 27	11h 09m 51s	-25° 41’ 54”	14.95	Hydra
2021 Oct 28	11h 10m 51s	-25° 45’ 56”	14.95	Hydra
2021 Oct 29	11h 11m 52s	-25° 49’ 59”	14.94	Hydra
2021 Oct 30	11h 12m 51s	-25° 54’ 02”	14.93	Hydra
2021 Oct 31	11h 13m 50s	-25° 58’ 05”	14.93	Hydra
2021 Nov 01	11h 14m 49s	-26° 02’ 08”	14.92	Hydra