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🌎  Observing from: Greenwich, United Kingdom [change]

Comet SWAN (C/2020 F8)

Comet SWAN (C/2020 F8) is currently in the constellation of Eridanus. The current Right Ascension of Comet SWAN (C/2020 F8) is 04h 05m 54s and the Declination is -21° 58’ 58” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet SWAN (C/2020 F8) is 21.25 (JPL).

Summary of key facts about Comet SWAN (C/2020 F8) [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]:

04h 05m 54s
-21° 58’ 58”

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.

Additional information about Comet SWAN (C/2020 F8) available on TheSkyLive:

Available Resources

Comet SWAN (C/2020 F8) Position and Finder Charts

Below we provide Comet SWAN (C/2020 F8) 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 SWAN (C/2020 F8) in Eridanus on February, 05 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet SWAN (C/2020 F8) in Eridanus on February, 05 2023
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 SWAN (C/2020 F8) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2020 F8 (SWAN)
RA: 04h 05m 54s
Dec: -21° 58’ 58”
Deep sky finder chart for Comet SWAN (C/2020 F8)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet SWAN (C/2020 F8)?, a page that provides all the information needed to find Comet SWAN (C/2020 F8) in the sky and additional links to sky charts.

Comet SWAN (C/2020 F8) Distance from Earth

The distance of Comet SWAN (C/2020 F8) from Earth is currently 1,543,149,296 kilometers, equivalent to 10.315316 Astronomical Units. Light takes 1 hours, 25 minutes and 47.3920 seconds to travel from Comet SWAN (C/2020 F8) and arrive to us.

1 hours, 25 minutes and 47.3920 seconds

The following chart shows the distance of Comet SWAN (C/2020 F8) 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 SWAN (C/2020 F8) 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/2020 F8 (SWAN) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet SWAN (C/2020 F8) to Earth

Between January 2013 and December 2100, the closest approach of Comet SWAN (C/2020 F8) to Earth happens on Wed May 13 2020 at a distance of 0.555961 Astronomical Units, or 83,170,523 kilometers:

Wed May 13 2020

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

Comet SWAN (C/2020 F8) brightness

The current visual magnitude of Comet SWAN (C/2020 F8) is 21.25.


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 SWAN (C/2020 F8), 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 SWAN (C/2020 F8) between January 2013 and December 2100

Comet SWAN (C/2020 F8) rise and set times

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

Today's Comet SWAN (C/2020 F8) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 112.0°
Max altitude: 16.6°
Azimuth: 248.1°

The rise and set times are defined as the time at which the upper limb of Comet SWAN (C/2020 F8) 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 SWAN (C/2020 F8) Orbital Elements

The following table lists the orbital elements of Comet SWAN (C/2020 F8) at epoch 25 April 2020 00:00 UTC (JD: 2458965.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99993522
Orbit inclination i 110.79774989°
Perihelion distance q 0.43033201 AU
64,376,752 km
Aphelion distance Q 13,284.78960615 AU
1,987,376,241,764 km
Semi-major axis a 6,642.60996908 AU
993,720,309,258 km
Orbital period period 541,397.6068 years
197,745,475.8752 days
Date of perihelion transit Tp 2020-May-27 13:04:39
2,458,997.0449 JD
Next perihelion transit 2185-Jun-22 05:38
200,204,472.9201 JD
Argument of perihelion peri 68.193326113454°
Longitude of the ascending node node 260.02922794616°
Mean anomaly M 359.99994257181°
Mean motion n 0.00000182°/day

Visualization of Comet SWAN (C/2020 F8) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet SWAN (C/2020 F8) with respect of the Sun and the orbits of the major planets. The position of Comet SWAN (C/2020 F8) 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 SWAN (C/2020 F8)
View Comet SWAN (C/2020 F8) in the 3D Solar System Simulator

Comet SWAN (C/2020 F8) 15 Days Ephemeris

The following table lists the ephemerides of Comet SWAN (C/2020 F8) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet SWAN (C/2020 F8) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Jan 29 04h 07m 00s -22° 21’ 00” 21.21 Eridanus
2023 Jan 30 04h 06m 51s -22° 18’ 03” 21.22 Eridanus
2023 Jan 31 04h 06m 41s -22° 15’ 07” 21.23 Eridanus
2023 Feb 01 04h 06m 30s -22° 12’ 09” 21.23 Eridanus
2023 Feb 02 04h 06m 21s -22° 09’ 08” 21.24 Eridanus
2023 Feb 03 04h 06m 12s -22° 06’ 06” 21.24 Eridanus
2023 Feb 04 04h 06m 05s -22° 03’ 02” 21.25 Eridanus
2023 Feb 05 04h 05m 57s -21° 59’ 57” 21.25 Eridanus
2023 Feb 06 04h 05m 49s -21° 56’ 52” 21.26 Eridanus
2023 Feb 07 04h 05m 43s -21° 53’ 44” 21.27 Eridanus
2023 Feb 08 04h 05m 36s -21° 50’ 35” 21.27 Eridanus
2023 Feb 09 04h 05m 30s -21° 47’ 26” 21.28 Eridanus
2023 Feb 10 04h 05m 25s -21° 44’ 15” 21.28 Eridanus
2023 Feb 11 04h 05m 20s -21° 41’ 03” 21.29 Eridanus