Comet C/2024 J4 (Lemmon) Observation Details
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C/2024 J4 (Lemmon) Daily Motion
90004857 C/2024 J4 (Lemmon) will be visible until July, 28, when it will move too close to the Sun. During this time, its proximity to the Sun will cause it to disappear from the night sky, making it unobservable for a while.
C/2024 J4 (Lemmon) Visibility on May 21
90004857 C/2024 J4 (Lemmon) is visible all night until sunrise
C/2024 J4 (Lemmon) Rise and Set Timetable
| Time | Elevation | |
Moon Rise, 14.7% illuminated  | 07:38 | -43° |
| C/2024 J4 (Lemmon) rise | 14:34 | |
| Sunset | 18:12 | 42° |
| Civil sunset | 18:43 | 47° |
| Twighlight start | 19:20 | 52° |
| Astrosession begin | 20:00 | 56° |
| C/2024 J4 (Lemmon) transit | 20:51 | 59° |
| Moon Set | 22:47 | 49° |
| Astrosession end | 02:08 | 12° |
| Twighlight end | 02:48 | 4° |
| C/2024 J4 (Lemmon) set | 03:09 |
Track C/2024 J4 (Lemmon) Position Throughout the Night
← Thu, 21 May 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe C/2024 J4 (Lemmon) changing position in the night sky.
C/2024 J4 (Lemmon) Description
C/2024 J4 (Lemmon), designated as 90004857 C/2024 J4 (Lemmon), is a Jupiter-family comet. At the moment, 90004857 C/2024 J4 (Lemmon) is 5.533 AU (827,725,019 km) from Earth, and it is located in the constellation Virgo.Current position of C/2024 J4 (Lemmon) in Solar System
| Date | Thu, 21 May 2026 |
| Distance from Earth to C/2024 J4 (Lemmon) | 5.5463 AU (829,714,670km) |
| Elongation | 138° |
| Angular diameter | " |
| Magnitude | 19.5 |
Finder Chart for C/2024 J4 (Lemmon)
Double-click to unlock the map.
| Object name | 90004857 C/2024 J4 (Lemmon) |
| Field of view | |
| Limiting magnitude | |
| 90004857 C/2024 J4 (Lemmon) coordinates | 13.6719, 6.00633 |
| Center coordinates | 13.6719, 6.00633 |
Annual motion of C/2024 J4 (Lemmon)
| Date | Thu, 21 May 2026 |
| Twighlight start | 19:55 |
| Twighlight end | 02:02 |
| Twighlight duration | 6h 7m |
| Rise | 14:30 |
| Set | 03:05 |
| Elevation at transit | 59° |
| Transit time | 20:47 |
| Equatorial coordinates | RA: 13h 39m 28s", Dec: 05° 58' 01s |
| Magnitude | 20 |
| Constellation | Virgo |
The graph illustrates the annual visibility pattern of a C/2024 J4 (Lemmon), providing a comprehensive overview of its daily appearances and transit times throughout the year.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the C/2024 J4 (Lemmon) is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit. You can also view detailed visibility information in a dedicated table, including exact rise, transit, and set times for each date.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the C/2024 J4 (Lemmon) is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit. You can also view detailed visibility information in a dedicated table, including exact rise, transit, and set times for each date.
Astrometric & Physical Parameters of 90004857 C/2024 J4 (Lemmon)
Coordinates & Visibility
| Right Ascension | 13.6719° |
| Declination | 6.00633° |
| Magnitude | 19.5 |
| Constellation | Virgo |
| Elevation | -14.3° |
| Azimuth | -70.7° |
Acknowledgments
We acknowledge NASA's Jet Propulsion Laboratory (JPL) for providing essential data on asteroids and comets through their Small-Body Database (SBDB) and Center for Near-Earth Object Studies (CNEOS). Their continuous efforts in tracking and cataloging these celestial bodies make it possible to offer accurate and up-to-date information on their positions, orbits, and physical characteristics.