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Sunrise: 4:53 
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Comets » 

Comet P/2023 S1

Above the horizon.  Rise: 9:54 | Tran: 16:19 | Set: 22:45
Alt: 32.14°   Az: 127.63°   Direction: South-East

Comet P/2023 S1 is in the constellation of Sextans, at a distance of 490,025,653.0 kilometers from Earth. The current Right Ascension is 10h 23m 05s and the Declination is +05° 24’ 29” (apparent coordinates). The estimated magnitude of comet P/2023 S1, computed using JPL Horizons's data, is 17.92.

Finder Charts

The sky charts below show, at different resolutions, the position of comet P/2023 S1 in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of comet P/2023 S1 in the constellation of Sextans on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of comet P/2023 S1 in the constellation of Sextans 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 P/2023 S1 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.

P/2023 S1
RA: 10h 21m 45s
Dec: +05° 32’ 15”
Simplified high-resolution deep sky chart showing the current position of comet P/2023 S1. Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

10h 23m 05s
+05° 24’ 29”
21h 10m 36s
07h 33m 42s

J2000

10h 21m 45s
+05° 32’ 15”

Additional Information

Sextans
n/a
n/a
n/a
n/a
17.92

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 P/2023 S1 from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 84.6°
Max altitude: 43.9°
Azimuth: 275.3°

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 P/2023 S1 from Earth is currently 490,025,653.0 kilometers, equivalent to 3.2756191696 Astronomical Units. Light takes 27m 14.550s to travel from comet P/2023 S1 and arrive to us.

490,025,653.0
3.2756191696
27m 14.550s

The following graph shows the distance of comet P/2023 S1 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 P/2023 S1 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 P/2023 S1 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 P/2023 S1 to Earth will happen on Monday 1 February 2055 at a distance of 1.583669 Astronomical Units, or 236,913,515 kilometers:

Monday 1 February 2055
236,913,515
1.583669

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 P/2023 S1, 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 P/2023 S1 as a function of time

Orbital Elements

The following table lists the orbital elements of comet P/2023 S1 at epoch September, 29 2024 00:00 UTC (JD: 2460583.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.31895270
Orbit inclination i 9.15553663°
Perihelion distance q 2.61974098 AU
391,907,673 km
Aphelion distance Q 5.07353083 AU
758,989,410 km
Semi-major axis a 3.84663590 AU
575,448,542 km
Orbital period period 7.5445 years
2,755.6246 days
Date of perihelion transit Tp February 24, 2025
2,460,730.5287 JD
Next perihelion transit September 10, 2032
2,463,486.1533 JD
Argument of perihelion peri 180.26407180583°
Longitude of the ascending node node 317.29544876562°
Mean anomaly M 340.79188754367°
Mean motion n 0.13064189°/day

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of comet P/2023 S1 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 P/2023 S1 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 30 2025 10h 12m 16s +06° 33’ 50” 17.83 Leo
Jul 01 2025 10h 13m 42s +06° 24’ 46” 17.84 Leo
Jul 02 2025 10h 15m 08s +06° 15’ 38” 17.85 Leo
Jul 03 2025 10h 16m 34s +06° 06’ 28” 17.87 Sextans
Jul 04 2025 10h 18m 00s +05° 57’ 16” 17.88 Sextans
Jul 05 2025 10h 19m 27s +05° 48’ 00” 17.89 Sextans
Jul 06 2025 10h 20m 52s +05° 38’ 43” 17.90 Sextans
Jul 07 2025 10h 22m 19s +05° 29’ 23” 17.91 Sextans
Jul 08 2025 10h 23m 46s +05° 19’ 59” 17.92 Sextans
Jul 09 2025 10h 25m 13s +05° 10’ 35” 17.93 Sextans
Jul 10 2025 10h 26m 40s +05° 01’ 08” 17.94 Sextans
Jul 11 2025 10h 28m 08s +04° 51’ 37” 17.95 Sextans
Jul 12 2025 10h 29m 35s +04° 42’ 05” 17.96 Sextans
Jul 13 2025 10h 31m 03s +04° 32’ 31” 17.97 Sextans

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