Comet P/2023 S1

Comet P/2023 S1 is in the constellation of Sextans, at a distance of 497,673,951.0 kilometers from Earth. The current Right Ascension is 10h 29m 49s and the Declination is +04° 40’ 33” (apparent coordinates). The estimated magnitude of comet P/2023 S1, computed using JPL Horizons's data, is 17.96.

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.

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.

Equatorial Coordinates

Apparent

J2000

Additional Information

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, United Kingdom (all times relative to the local timezone Europe/London):

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 497,673,951.0 kilometers, equivalent to 3.3267448839 Astronomical Units. Light takes 27m 40.062s to travel from comet P/2023 S1 and arrive to us.

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.

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:

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.

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
Jul 05 2025	10h 19m 27s	+05° 48’ 00”	17.89	Sextans
Jul 06 2025	10h 20m 52s	+05° 38’ 42”	17.90	Sextans
Jul 07 2025	10h 22m 19s	+05° 29’ 22”	17.91	Sextans
Jul 08 2025	10h 23m 46s	+05° 19’ 59”	17.92	Sextans
Jul 09 2025	10h 25m 13s	+05° 10’ 34”	17.93	Sextans
Jul 10 2025	10h 26m 40s	+05° 01’ 07”	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’ 30”	17.97	Sextans
Jul 14 2025	10h 32m 31s	+04° 22’ 54”	17.98	Sextans
Jul 15 2025	10h 33m 58s	+04° 13’ 15”	17.99	Sextans
Jul 16 2025	10h 35m 26s	+04° 03’ 34”	18.00	Sextans
Jul 17 2025	10h 36m 55s	+03° 53’ 51”	18.01	Sextans
Jul 18 2025	10h 38m 23s	+03° 44’ 05”	18.02	Sextans

Additional Resources on TheSkyLive

• Comet P/2023 S1: Complete reference information on TheSkyLive.com.
• Where is comet P/2023 S1?: Key information on where to find comet P/2023 S1 in the sky.
• Distance of comet P/2023 S1 from Earth: Find out how far comet P/2023 S1 is from Earth right now.
• How Bright is comet P/2023 S1?: Current visual brightness (magnitude) and apparent size.
• Rise and Set Times: Rise and set times of comet P/2023 S1 from your location.
• Interactive Sky Map: Planetarium-style interactive visualization of comet P/2023 S1's position in the sky.
• Live Position Tracker: High precision real time tracker of comet P/2023 S1's position using deep space imagery.
• Ephemeris: 15 days comet P/2023 S1's computed ephemeris.
• Orbital elements: Information about comet P/2023 S1 orbital parameters.
• Orbit Visualization: 3D interactive visualization showing the orbit of comet P/2023 S1 with respect to the major Solar System objects.