Comet C/2023 H5 (Lemmon)
Comet C/2023 H5 (Lemmon) is in the constellation of
Ursa Major,
at a distance of
Finder Charts
View interactive star map
High precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2023 H5 (Lemmon) is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Comet C/2023 H5 (Lemmon)?, a page that provides all the information needed to find Comet C/2023 H5 (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/2023 H5 (Lemmon) from Greenwich, UK (all times relative to the local timezone Europe/London):
- C/2023 H5 (Lemmon) is above the horizon from Greenwich, UK.
- Right now it is placed in the North-North-East direction at an altitude of 40.62° above the horizon.
- Given its current magnitude, C/2023 H5 (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/2023 H5 (Lemmon) from Earth is currently
The following chart shows the distance of Comet C/2023 H5 (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/2023 H5 (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/2023 H5 (Lemmon) to Earth happens on Sat Feb 22 2025 at a distance of 3.738543 Astronomical Units, or 559,278,089 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/2023 H5 (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/2023 H5 (Lemmon) at epoch 04 September 2024 00:00 UTC (JD: 2460558.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 1.00038807 |
| Orbit inclination | i | 97.86088989° |
| Perihelion distance | q | 4.31283269 AU 645,190,588 km |
| Aphelion distance | Q | n.a. |
| Semi-major axis | a | n.a. |
| Orbital period | period | n.a. |
| Date of perihelion transit | Tp | 2025-Jun-30 04:12:16 2,460,856.6752 JD |
| Argument of perihelion | peri | 60.082903930745° |
| Longitude of the ascending node | node | 159.48174964041° |
| Mean anomaly | M | -0.00025084129973455° |
| Mean motion | n | 0.00000084°/day |
View Comet C/2023 H5 (Lemmon) in the 3D Solar System Simulator
15 Days Ephemeris
The following table lists the ephemerides of Comet C/2023 H5 (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 05 | 10h 39m 26s | +65° 02’ 22” | 16.63 | Ursa Major |
| 2025 Jun 06 | 10h 39m 47s | +65° 00’ 15” | 16.63 | Ursa Major |
| 2025 Jun 07 | 10h 40m 10s | +64° 58’ 08” | 16.63 | Ursa Major |
| 2025 Jun 08 | 10h 40m 35s | +64° 56’ 00” | 16.64 | Ursa Major |
| 2025 Jun 09 | 10h 41m 02s | +64° 53’ 51” | 16.64 | Ursa Major |
| 2025 Jun 10 | 10h 41m 30s | +64° 51’ 42” | 16.64 | Ursa Major |
| 2025 Jun 11 | 10h 41m 59s | +64° 49’ 33” | 16.65 | Ursa Major |
| 2025 Jun 12 | 10h 42m 30s | +64° 47’ 22” | 16.65 | Ursa Major |
| 2025 Jun 13 | 10h 43m 03s | +64° 45’ 12” | 16.65 | Ursa Major |
| 2025 Jun 14 | 10h 43m 37s | +64° 43’ 01” | 16.66 | Ursa Major |
| 2025 Jun 15 | 10h 44m 14s | +64° 40’ 51” | 16.66 | Ursa Major |
| 2025 Jun 16 | 10h 44m 50s | +64° 38’ 39” | 16.66 | Ursa Major |
| 2025 Jun 17 | 10h 45m 29s | +64° 36’ 29” | 16.67 | Ursa Major |
| 2025 Jun 18 | 10h 46m 10s | +64° 34’ 18” | 16.67 | Ursa Major |
Additional Resources on TheSkyLive
- Comet C/2023 H5 (Lemmon): Complete reference information on TheSkyLive.com.
- Where is Comet C/2023 H5 (Lemmon)?: Key information on locating Comet C/2023 H5 (Lemmon) in the sky.
- Distance from Earth: Find out how far Comet C/2023 H5 (Lemmon) is from Earth right now.
- How Bright is Comet C/2023 H5 (Lemmon)?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Comet C/2023 H5 (Lemmon)'s rise and set times from your location.
- Interactive Sky Map: planetarium-style interactive visualization of Comet C/2023 H5 (Lemmon)'s position in the sky.
- Live Position Tracker: high precision position tracker with deep space imagery.
- Ephemeris: 15 days Comet C/2023 H5 (Lemmon)'s computed ephemeris.
- Orbital elements: information about Comet C/2023 H5 (Lemmon) orbital parameters.
- Orbit Visualization. 3d interactive visualization showing the orbit of Comet C/2023 H5 (Lemmon) with respect to the major Solar System objects.