Comet 90000568 48P/Johnson Observation Details
48P/Johnson Daily Motion
48P/Johnson will rise at 13:28, reaching 34° when twilight begins at 16:24. It will reach transit at 56° by 19:39 and will set before twilight ends at 01:50.90000568 48P/Johnson will be visible until April, 9, 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.
48P/Johnson Visibility Timetable on December 16
48P/Johnson Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 18% illuminated | 01:22 | 6° |
| Moon Set | 11:50 | -19° |
| 48P/Johnson rise | 13:28 | |
| Sunset | 14:49 | 16° |
| Civil sunset | 15:20 | 22° |
| Astrosession begin | 16:24 | 34° |
| 48P/Johnson transit | 19:39 | 56° |
| 48P/Johnson set | 01:50 | |
| Astrosession end | 03:41 | -22° |
Track 48P/Johnson Position Throughout the Night
← Tue, 16 December 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe 48P/Johnson changing position in the night sky.
48P/Johnson Description
48P/Johnson, designated as 90000568 48P/Johnson, is an Encke-type comet. At the moment, 90000568 48P/Johnson is 2.045 AU (305,897,726 km) from Earth, and it is located in the constellation Cetus.Current position of 48P/Johnson in Solar System
| Date | Tue, 16 December 2025 |
| Distance from Earth to 48P/Johnson | 2.0573 AU (307,767,699km) |
| Elongation | 140° |
| Angular diameter | " |
| Magnitude | 18.3 |
Finder Chart for 48P/Johnson
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| Object name | 90000568 48P/Johnson |
| Field of view | |
| Limiting magnitude | |
| 90000568 48P/Johnson coordinates | 3.21192, 3.74972 |
| Center coordinates | 3.21192, 3.74972 |
Annual motion of 48P/Johnson
| Date | Tue, 16 December 2025 |
| Twighlight start | 16:20 |
| Twighlight end | 03:35 |
| Twighlight duration | 11h 15m |
| Rise | 13:24 |
| Set | 01:46 |
| Elevation at transit | 56° |
| Transit time | 19:35 |
| Equatorial coordinates | RA: 03h 12m 15s", Dec: 03° 49' 19s |
| Magnitude | 18 |
| Constellation | Cetus |
The graph illustrates the annual visibility pattern of a 48P/Johnson, 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 48P/Johnson 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.
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 48P/Johnson 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.
Astrometric & Physical Parameters of 90000568 48P/Johnson
Coordinates & Visibility
| Right Ascension | 3.21192° |
| Declination | 3.74972° |
| Magnitude | 18.3 |
| Constellation | Cetus |
| Elevation | -33.7° |
| Azimuth | -52.6° |
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.