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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
Comets » 

Comet SWAN (C/2020 F8)

Altitude: 8.2°   Azimuth: 208.8°   Direction: South-South-West

Comet SWAN (C/2020 F8) is currently in the constellation of Eridanus.

The current Right Ascension of Comet SWAN (C/2020 F8) is 04h 25m 41s and the Declination is -25° 19’ 37” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current estimated magnitude of Comet SWAN (C/2020 F8) is 21.91 (JPL).

04h 25m 41s
-25° 19’ 37”

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.

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

Azimuth: 115.3°
Max altitude: 13.2°
Azimuth: 244.7°
  • C/2020 F8 (SWAN) is above the horizon from Greenwich, United Kingdom edit_location_alt.
  • Right now it is placed in the South-South-West direction at an altitude of 8° above the horizon.
  • Given its current magnitude, C/2020 F8 (SWAN) 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.

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.

Finder chart of C/2020 F8 (SWAN) in Eridanus on November,29 2023
Map showing Comet SWAN (C/2020 F8) in Eridanus on November, 29 2023
Field of view: 50x30 degrees
View fullscreen
Finder chart of C/2020 F8 (SWAN)
Map showing Comet SWAN (C/2020 F8) in Eridanus on November, 29 2023
Field of view: 10x6 degrees
View fullscreen

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 25m 41s
Dec: -25° 19’ 37”
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 1,771,852,407 kilometers, equivalent to 11.844102 Astronomical Units. Light takes 1 hours, 38 minutes and 30.2634 seconds to travel from Comet SWAN (C/2020 F8) and arrive to us.

1 hours, 38 minutes and 30.2634 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.

Chart of the distance of Comet SWAN (C/2020 F8) 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/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 1 January 2013 and 30 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 and Light Curve

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.

Chart of the magnitude of Comet SWAN (C/2020 F8) as a function of time

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 Nov 22 04h 28m 21s -25° 11’ 39” 21.89 Eridanus
2023 Nov 23 04h 27m 57s -25° 12’ 59” 21.90 Eridanus
2023 Nov 24 04h 27m 35s -25° 14’ 15” 21.90 Eridanus
2023 Nov 25 04h 27m 12s -25° 15’ 25” 21.90 Eridanus
2023 Nov 26 04h 26m 49s -25° 16’ 33” 21.90 Eridanus
2023 Nov 27 04h 26m 27s -25° 17’ 36” 21.91 Eridanus
2023 Nov 28 04h 26m 04s -25° 18’ 37” 21.91 Eridanus
2023 Nov 29 04h 25m 42s -25° 19’ 32” 21.91 Eridanus
2023 Nov 30 04h 25m 19s -25° 20’ 22” 21.91 Eridanus
2023 Dec 01 04h 24m 57s -25° 21’ 10” 21.92 Eridanus
2023 Dec 02 04h 24m 34s -25° 21’ 52” 21.92 Eridanus
2023 Dec 03 04h 24m 12s -25° 22’ 31” 21.92 Eridanus
2023 Dec 04 04h 23m 49s -25° 23’ 06” 21.92 Eridanus
2023 Dec 05 04h 23m 27s -25° 23’ 35” 21.93 Eridanus