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Comets » 

Comet C/2025 J1 (Borisov)

Above the horizon.  Circumpolar today
Alt: 58.31°   Az: 12.45°   Direction: North-North-East

Comet C/2025 J1 (Borisov) is in the constellation of Draco, at a distance of 764,868,178.0 kilometers from Earth. The current Right Ascension is 09h 51m 23s and the Declination is +80° 08’ 07” (apparent coordinates). The latest observed magnitude of comet C/2025 J1 (Borisov) is 19.0 (data provided by COBS).

Finder Charts

The sky charts below show, at different resolutions, the position of comet C/2025 J1 (Borisov) in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of comet C/2025 J1 (Borisov) in the constellation of Draco on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of comet C/2025 J1 (Borisov) in the constellation of Draco on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

The following map uses photographic imagery from the Digitized Sky Survey (DSS) to realistically visualize the precise position of comet C/2025 J1 (Borisov) against the stars in the background. The horizontal size of the map measures 60 arcminutes. Click on the image to access a more detailed full-screen view.

C/2025 J1 (Borisov)
RA: 09h 48m 19s
Dec: +80° 15’ 18”
Simplified high-resolution deep sky chart showing the current position of comet C/2025 J1 (Borisov). Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

09h 51m 23s
+80° 08’ 07”
21h 14m 31s
07h 05m 55s

J2000

09h 48m 19s
+80° 15’ 18”

Additional Information

Draco
19.0
0.4'
n/a
2025-06-25
19.16

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

The following table lists today's rise, transit and set times of comet C/2025 J1 (Borisov) from Greenwich, UK (all times relative to the local timezone Europe/London):

Today comet C/2025 J1 (Borisov) is circumpolar and transits at 15:03 UTC reaching a maximum altitude of 61.3°.

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 J1 (Borisov) from Earth is currently 764,868,178.0 kilometers, equivalent to 5.1128279729 Astronomical Units. Light takes 42m 31.326s to travel from comet C/2025 J1 (Borisov) and arrive to us.

764,868,178.0
5.1128279729
42m 31.326s

The following graph shows the distance of comet C/2025 J1 (Borisov) from Earth as a function of time. In the chart the distance is measured in Astronomical Units and the data is sampled with an interval of 1 day.

Chart of the distance of comet C/2025 J1 (Borisov) from Earth in Astronomical Units (au)
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).

The value of the distance of C/2025 J1 (Borisov) from Earth is also available as a real time updated value in the live position tracker.

Closest Approach to Earth

In the period between January 1, 2000 and December 31, 2099, the closest approach of comet C/2025 J1 (Borisov) to Earth will happen on Thursday 10 December 2026 at a distance of 3.076413 Astronomical Units, or 460,224,788 kilometers:

Thursday 10 December 2026
460,224,788
3.076413

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

Light Curve

The following chart shows the light curve of comet C/2025 J1 (Borisov), i.e., its apparent magnitude as a function of time. The curve is calculated using the latest ephemerides provided by JPL Horizons. The magnitude data is sampled with the interval of 2 days. Because of this sampling, inaccuracies may occur for objects that have large variations of brightness over a few days. For comets, large discrepancies can arise between the calculated brightness and the observations due to their highly dynamic, and not always precisely predictable, behavior.

Chart of the magnitude of comet C/2025 J1 (Borisov) as a function of time

Orbital Elements

The following table lists the orbital elements of comet C/2025 J1 (Borisov) at epoch May, 08 2025 00:00 UTC (JD: 2460804.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00069617
Orbit inclination i 95.43619306°
Perihelion distance q 3.57584517 AU
534,938,825 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp June 11, 2026
2,461,202.9975 JD
Argument of perihelion peri 166.68947879112°
Longitude of the ascending node node 274.01020339081°
Mean anomaly M -0.0010669294670111°
Mean motion n 0.00000268°/day

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of comet C/2025 J1 (Borisov) relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.

15 Days Ephemeris

The following table lists the ephemerides of comet C/2025 J1 (Borisov) 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
Jun 26 2025 09h 46m 47s +81° 43’ 26” 19.20 Camelopardalis
Jun 27 2025 09h 47m 18s +81° 30’ 28” 19.20 Camelopardalis
Jun 28 2025 09h 47m 52s +81° 17’ 35” 19.19 Draco
Jun 29 2025 09h 48m 26s +81° 04’ 47” 19.19 Draco
Jun 30 2025 09h 49m 03s +80° 52’ 04” 19.18 Draco
Jul 01 2025 09h 49m 42s +80° 39’ 27” 19.17 Draco
Jul 02 2025 09h 50m 21s +80° 26’ 54” 19.17 Draco
Jul 03 2025 09h 51m 02s +80° 14’ 28” 19.16 Draco
Jul 04 2025 09h 51m 44s +80° 02’ 07” 19.16 Draco
Jul 05 2025 09h 52m 28s +79° 49’ 51” 19.15 Draco
Jul 06 2025 09h 53m 13s +79° 37’ 41” 19.14 Draco
Jul 07 2025 09h 53m 58s +79° 25’ 36” 19.14 Draco
Jul 08 2025 09h 54m 44s +79° 13’ 37” 19.13 Draco
Jul 09 2025 09h 55m 31s +79° 01’ 44” 19.12 Draco

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