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Comets » 

Comet C/2025 F2 (SWAN)

Below the horizon.  Rise: 9:18 | Tran: 13:38 | Set: 17:57
Alt: -40.84°   Az: 293.78°   Direction: West-North-West

Comet C/2025 F2 (SWAN) is in the constellation of Lepus, at a distance of 214,311,245.0 kilometers from Earth. The current Right Ascension is 05h 36m 08s and the Declination is -18° 45’ 51” (apparent coordinates). The predicted magnitude of Comet C/2025 F2 (SWAN) is 12.69 (data provided by JPL Horizons).

Finder Charts

Map showing Comet C/2025 F2 (SWAN) in Lepus on June, 05 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Comet C/2025 F2 (SWAN) in Lepus on June, 05 2025. Field of view: 15x9 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2025 F2 (SWAN) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2025 F2 (SWAN)
RA: 05h 35m 01s
Dec: -18° 46’ 45”
Deep sky finder chart for Comet C/2025 F2 (SWAN). Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Comet C/2025 F2 (SWAN)?, a page that provides all the information needed to find Comet C/2025 F2 (SWAN) in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

05h 36m 08s
-18° 45’ 51”
08h 52m 03s
14h 28m 11s

J2000

05h 35m 01s
-18° 46’ 45”

Additional Information

Lepus
n/a
n/a
n/a
n/a
12.69

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.

Rise and Set Times

Today's rise, transit and set times of Comet C/2025 F2 (SWAN) from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 108.4°
Max altitude: 20.0°
Azimuth: 251.4°
  • C/2025 F2 (SWAN) is below the horizon from Greenwich, UK.
  • Given its current magnitude, C/2025 F2 (SWAN) is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.
  • 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.

Distance from Earth

The distance of Comet C/2025 F2 (SWAN) from Earth is currently 214,311,245.0 kilometers, equivalent to 1.4325821885 Astronomical Units. Light takes 11m 54.865s to travel from Comet C/2025 F2 (SWAN) and arrive to us.

214,311,245.0
1.4325821885
11m 54.865s

The following chart shows the distance of Comet C/2025 F2 (SWAN) 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 C/2025 F2 (SWAN) 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/2025 F2 (SWAN) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach

Between 1 January 2000 and 31 December 2099, the closest approach of Comet C/2025 F2 (SWAN) to Earth happens on Fri May 2 2025 at a distance of 0.962698 Astronomical Units, or 144,017,526 kilometers:

Fri May 2 2025
144,017,526
0.962698

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

Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2025 F2 (SWAN), 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 C/2025 F2 (SWAN) as a function of time

Orbital Elements

The following table lists the orbital elements of Comet C/2025 F2 (SWAN) at epoch 20 March 2025 00:00 UTC (JD: 2460755.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99997363
Orbit inclination i 90.37190990°
Perihelion distance q 0.33342273 AU
49,879,330 km
Aphelion distance Q 25,286.58475929 AU
3,782,819,244,850 km
Semi-major axis a 12,643.45909101 AU
1,891,434,562,090 km
Orbital period period 1,421,697.0551 years
519,274,849.3607 days
Date of perihelion transit Tp 2025-May-01 03:49:15
2,460,796.6592 JD
Next perihelion transit 4096-Feb-04 00:01
521,735,646.0199 JD
Argument of perihelion peri 153.84988301817°
Longitude of the ascending node node 329.84365284104°
Mean anomaly M 359.99997146537°
Mean motion n 0.00000069°/day
2h1>Orbit Visualization
Orbit Diagram of Comet C/2025 F2 (SWAN)
View Comet C/2025 F2 (SWAN) in the 3D Solar System Simulator

15 Days Ephemeris

The following table lists the ephemerides of Comet C/2025 F2 (SWAN) computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 May 29 05h 26m 13s -12° 46’ 32” 11.43 Lepus
2025 May 30 05h 27m 33s -13° 36’ 20” 11.61 Lepus
2025 May 31 05h 28m 52s -14° 24’ 42” 11.78 Lepus
2025 Jun 01 05h 30m 08s -15° 11’ 45” 11.94 Lepus
2025 Jun 02 05h 31m 24s -15° 57’ 34” 12.10 Lepus
2025 Jun 03 05h 32m 38s -16° 42’ 13” 12.26 Lepus
2025 Jun 04 05h 33m 52s -17° 25’ 50” 12.41 Lepus
2025 Jun 05 05h 35m 04s -18° 08’ 27” 12.56 Lepus
2025 Jun 06 05h 36m 15s -18° 50’ 09” 12.71 Lepus
2025 Jun 07 05h 37m 26s -19° 31’ 02” 12.85 Lepus
2025 Jun 08 05h 38m 36s -20° 11’ 06” 12.99 Lepus
2025 Jun 09 05h 39m 45s -20° 50’ 28” 13.12 Lepus
2025 Jun 10 05h 40m 53s -21° 29’ 08” 13.25 Lepus
2025 Jun 11 05h 42m 02s -22° 07’ 12” 13.38 Lepus

Additional Resources on TheSkyLive