Comet C/2025 A6 (Lemmon)
Comet C/2025 A6 (Lemmon) is in the constellation of
Gemini,
at a distance of
Finder Charts
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High precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2025 A6 (Lemmon) is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Comet C/2025 A6 (Lemmon)?, a page that provides all the information needed to find Comet C/2025 A6 (Lemmon) in the sky and additional links to sky charts.
Celestial 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
Today's rise, transit and set times of Comet C/2025 A6 (Lemmon) from Greenwich, UK (all times relative to the local timezone Europe/London):
- C/2025 A6 (Lemmon) is below the horizon from Greenwich, UK.
- Given its current magnitude, C/2025 A6 (Lemmon) is visible only through long exposure photography.
- Go to interactive sky chart
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Distance from Earth
The distance of Comet C/2025 A6 (Lemmon) from Earth is currently
The following chart shows the distance of Comet C/2025 A6 (Lemmon) 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.
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 A6 (Lemmon) 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 A6 (Lemmon) to Earth happens on Tue Oct 21 2025 at a distance of 0.596130 Astronomical Units, or 89,179,743 kilometers:
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 A6 (Lemmon), 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.
Orbital Elements
The following table lists the orbital elements of Comet C/2025 A6 (Lemmon) at epoch 21 January 2025 00:00 UTC (JD: 2460697.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.99575642 |
| Orbit inclination | i | 143.62971264° |
| Perihelion distance | q | 0.52911433 AU 79,154,378 km |
| Aphelion distance | Q |
248.84229536 AU 37,226,277,601 km |
| Semi-major axis | a |
124.68570485 AU 18,652,715,989 km |
| Orbital period | period |
1,392.3012 years 508,538.0155 days |
| Date of perihelion transit | Tp | 2025-Nov-08 11:42:19 2,460,987.9877 JD |
| Argument of perihelion | peri | 132.99917370342° |
| Longitude of the ascending node | node | 108.09833729353° |
| Mean anomaly | M | 359.7943603451° |
| Mean motion | n | 0.00070791°/day |
View Comet C/2025 A6 (Lemmon) in the 3D Solar System Simulator
15 Days Ephemeris
The following table lists the ephemerides of Comet C/2025 A6 (Lemmon) 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 Jun 01 | 06h 27m 07s | +25° 11’ 42” | 20.11 | Gemini |
| 2025 Jun 02 | 06h 27m 42s | +25° 14’ 26” | 20.09 | Gemini |
| 2025 Jun 03 | 06h 28m 17s | +25° 17’ 09” | 20.07 | Gemini |
| 2025 Jun 04 | 06h 28m 53s | +25° 19’ 53” | 20.05 | Gemini |
| 2025 Jun 05 | 06h 29m 30s | +25° 22’ 37” | 20.03 | Gemini |
| 2025 Jun 06 | 06h 30m 07s | +25° 25’ 21” | 20.01 | Gemini |
| 2025 Jun 07 | 06h 30m 44s | +25° 28’ 06” | 19.99 | Gemini |
| 2025 Jun 08 | 06h 31m 22s | +25° 30’ 50” | 19.97 | Gemini |
| 2025 Jun 09 | 06h 32m 01s | +25° 33’ 35” | 19.95 | Gemini |
| 2025 Jun 10 | 06h 32m 40s | +25° 36’ 21” | 19.93 | Gemini |
| 2025 Jun 11 | 06h 33m 20s | +25° 39’ 06” | 19.91 | Gemini |
| 2025 Jun 12 | 06h 34m 00s | +25° 41’ 52” | 19.89 | Gemini |
| 2025 Jun 13 | 06h 34m 41s | +25° 44’ 38” | 19.87 | Gemini |
| 2025 Jun 14 | 06h 35m 22s | +25° 47’ 26” | 19.85 | Gemini |
Additional Resources on TheSkyLive
- Comet C/2025 A6 (Lemmon): Complete reference information on TheSkyLive.com.
- Where is Comet C/2025 A6 (Lemmon)?: Key information on locating Comet C/2025 A6 (Lemmon) in the sky.
- Distance from Earth: Find out how far Comet C/2025 A6 (Lemmon) is from Earth right now.
- How Bright is Comet C/2025 A6 (Lemmon)?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Comet C/2025 A6 (Lemmon)'s rise and set times from your location.
- Interactive Sky Map: planetarium-style interactive visualization of Comet C/2025 A6 (Lemmon)'s position in the sky.
- Live Position Tracker: high precision position tracker with deep space imagery.
- Ephemeris: 15 days Comet C/2025 A6 (Lemmon)'s computed ephemeris.
- Orbital elements: information about Comet C/2025 A6 (Lemmon) orbital parameters.
- Orbit Visualization. 3d interactive visualization showing the orbit of Comet C/2025 A6 (Lemmon) with respect to the major Solar System objects.