Comet C/2019 Q4 (Borisov)

Comet C/2019 Q4 (Borisov) is currently in the constellation of Ara. The current Right Ascension of Comet C/2019 Q4 (Borisov) is 17h 12m 05s and the Declination is -61° 54’ 06” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 Q4 (Borisov) is 23.48 (JPL).

Summary of key facts about Comet C/2019 Q4 (Borisov) [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 Q4 (Borisov) available on TheSkyLive:

Available Resources

• Position and finder charts (see also Where is Comet C/2019 Q4 (Borisov)?)
• Distance from Earth (see also How far is Comet C/2019 Q4 (Borisov) from Earth?)
• Rise and set times (see also When does Comet C/2019 Q4 (Borisov) rise and set?)
• Brightness (see also How bright is Comet C/2019 Q4 (Borisov)?)
• Orbital elements. Detailed information about Comet C/2019 Q4 (Borisov) orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Comet C/2019 Q4 (Borisov) with respect to the major Solar System objects.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet C/2019 Q4 (Borisov) for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet C/2019 Q4 (Borisov) 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 Q4 (Borisov) with your telescope or on your astrophotographies.

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2019 Q4 (Borisov) is right now. Click on the image to see a more detailed fullscreen tracker view.

Also check out Where is Comet C/2019 Q4 (Borisov)?, a page that provides all the information needed to find Comet C/2019 Q4 (Borisov) in the sky and additional links to sky charts.

Comet C/2019 Q4 (Borisov) Distance from Earth

The distance of Comet C/2019 Q4 (Borisov) from Earth is currently 1,550,939,949 kilometers, equivalent to 10.367393 Astronomical Units. Light takes 1 hours, 26 minutes and 13.3788 seconds to travel from Comet C/2019 Q4 (Borisov) and arrive to us.

The following chart shows the distance of Comet C/2019 Q4 (Borisov) 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 Q4 (Borisov) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2019 Q4 (Borisov) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2019 Q4 (Borisov) to Earth happens on Sat Dec 28 2019 at a distance of 1.936750 Astronomical Units, or 289,733,622 kilometers:

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

Comet C/2019 Q4 (Borisov) brightness

The current visual magnitude of Comet C/2019 Q4 (Borisov) is 23.48.

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 Q4 (Borisov), 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 Q4 (Borisov) rise and set times

Comet C/2019 Q4 (Borisov) is currently not visible from Greenwich, United Kingdom [change]

The rise and set times are defined as the time at which the upper limb of Comet C/2019 Q4 (Borisov) 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.

Visualization of Comet C/2019 Q4 (Borisov) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2019 Q4 (Borisov) with respect of the Sun and the orbits of the major planets. The position of Comet C/2019 Q4 (Borisov) 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!

Comet C/2019 Q4 (Borisov) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2019 Q4 (Borisov) 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 Q4 (Borisov) in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2021 May 10	17h 16m 23s	-61° 51’ 24”	23.43	Ara
2021 May 11	17h 15m 51s	-61° 51’ 59”	23.44	Ara
2021 May 12	17h 15m 19s	-61° 52’ 28”	23.45	Ara
2021 May 13	17h 14m 47s	-61° 52’ 54”	23.45	Ara
2021 May 14	17h 14m 13s	-61° 53’ 17”	23.46	Ara
2021 May 15	17h 13m 41s	-61° 53’ 35”	23.47	Ara
2021 May 16	17h 13m 06s	-61° 53’ 49”	23.47	Ara
2021 May 17	17h 12m 33s	-61° 54’ 01”	23.48	Ara
2021 May 18	17h 11m 58s	-61° 54’ 06”	23.48	Ara
2021 May 19	17h 11m 25s	-61° 54’ 09”	23.49	Ara
2021 May 20	17h 10m 50s	-61° 54’ 07”	23.50	Ara
2021 May 21	17h 10m 15s	-61° 54’ 02”	23.50	Ara
2021 May 22	17h 09m 42s	-61° 53’ 52”	23.51	Ara
2021 May 23	17h 09m 06s	-61° 53’ 38”	23.52	Ara