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🌎 Location: Greenwich, United Kingdom [change]

Comet C/2019 Q4 (Borisov)

Comet C/2019 Q4 (Borisov) is currently in the constellation of Norma. The current Right Ascension of Comet C/2019 Q4 (Borisov) is 15h 36m 16s and the Declination is -55° 39’ 13” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2019 Q4 (Borisov) is 22.01 (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]:

15h 36m 16s
-55° 39’ 13”
Norma
22.01

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Additional information about Comet C/2019 Q4 (Borisov) available on TheSkyLive:

Available Resources

Comet C/2019 Q4 (Borisov) Position and Finder Charts

Below we provide Comet C/2019 Q4 (Borisov) 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 Q4 (Borisov) in Norma on October, 27 2020
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2019 Q4 (Borisov) in Norma on October, 27 2020
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 Q4 (Borisov) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2019 Q4 (Borisov)
RA: 15h 36m 16s
Dec: -55° 39’ 13”
Deep sky finder chart for Comet C/2019 Q4 (Borisov)
Field of view: 60x40 arcmins
View fullscreen

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 1,168,007,672 kilometers, equivalent to 7.807649 Astronomical Units. Light takes 1 hours, 4 minutes and 56.0542 seconds to travel from Comet C/2019 Q4 (Borisov) and arrive to us.

1,168,007,672
7.807649
1 hours, 4 minutes and 56.0542 seconds

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.

Distance of Comet C/2019 Q4 (Borisov) 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 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 289,733,621 kilometers:

Sat Dec 28 2019
289,733,621
1.936750

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 22.01.

22.01
-
-

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.

Predicted magnitude of Comet C/2019 Q4 (Borisov) between January 2013 and December 2100

Comet C/2019 Q4 (Borisov) rise and set times

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

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.

Comet C/2019 Q4 (Borisov) Orbital Elements

The following table lists the orbital elements of Comet C/2019 Q4 (Borisov) at epoch 31 July 2020 00:00 UTC (JD: 2459062.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 3.35621510
Orbit inclination i 44.05257069°
Perihelion distance q 2.00658189 AU
300,180,379 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2019-Dec-08 13:04:54
2,458,826.0451 JD
Argument of perihelion peri 209.12367864°
Longitude of the ascending node node 308.14872628954°
Mean anomaly M 296.54425572941°
Mean motion n 1.25412592°/day

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!

Orbit Diagram of Comet C/2019 Q4 (Borisov)
View Comet C/2019 Q4 (Borisov) in the 3D Solar System Simulator

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
2020 Oct 20 15h 26m 53s -55° 37’ 58” 21.91 Circinus
2020 Oct 21 15h 28m 09s -55° 38’ 00” 21.92 Circinus
2020 Oct 22 15h 29m 24s -55° 38’ 05” 21.94 Circinus
2020 Oct 23 15h 30m 38s -55° 38’ 12” 21.95 Norma
2020 Oct 24 15h 31m 54s -55° 38’ 22” 21.96 Norma
2020 Oct 25 15h 33m 07s -55° 38’ 34” 21.98 Norma
2020 Oct 26 15h 34m 23s -55° 38’ 48” 21.99 Norma
2020 Oct 27 15h 35m 36s -55° 39’ 02” 22.00 Norma
2020 Oct 28 15h 36m 51s -55° 39’ 20” 22.01 Norma
2020 Oct 29 15h 38m 04s -55° 39’ 39” 22.03 Norma
2020 Oct 30 15h 39m 19s -55° 40’ 00” 22.04 Norma
2020 Oct 31 15h 40m 32s -55° 40’ 24” 22.05 Norma
2020 Nov 01 15h 41m 47s -55° 40’ 50” 22.06 Norma
2020 Nov 02 15h 43m 00s -55° 41’ 17” 22.08 Norma