Asteroid Nephthys Observation Details
Nephthys Daily Motion
287 Nephthys will be visible until December, 29, 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.
Nephthys Visibility on July 20
287 Nephthys is visible from evening until sunrise
Nephthys Rise and Set Timetable
| Time | Elevation | |
Moon Rise, 25.8% illuminated  | 09:58 | -51° |
| Nephthys rise | 18:46 | |
| Civil sunset | 18:55 | 2° |
| Twighlight start | 19:32 | 9° |
| Astrosession begin | 20:12 | 16° |
| Moon Set | 21:33 | 29° |
| Nephthys transit | 00:07 | 40° |
| Astrosession end | 02:15 | 32° |
| Twighlight end | 02:56 | 26° |
| Civil sunrise | 03:33 | 21° |
| Sunrise | 04:04 | 15° |
| Nephthys set | 05:28 |
Track Nephthys Position Throughout the Night
← Mon, 20 July 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Nephthys changing position in the night sky.
Nephthys Description
Nephthys, designated as 287 Nephthys, is a main-belt asteroid, located between Mars and Jupiter in the solar system. With a diameter of 60 km, 287 Nephthys completes its orbit around the Sun in 3.6 years. At the moment, 287 Nephthys is 1.316 AU (196,863,318 km) from Earth, and it is located in the constellation Aquarius.Current position of Nephthys in Solar System
| Date | Mon, 20 July 2026 |
| Distance from Earth to Nephthys | 1.31463 AU (196,665,849km) |
| Elongation | 165° |
| Angular diameter | " |
| Magnitude | 11.1 |
Finder Chart for Nephthys
Double-click to unlock the map.
| Object name | 287 Nephthys |
| Field of view | |
| Limiting magnitude | |
| 287 Nephthys coordinates | 20.87774, -12.139 |
| Center coordinates | 20.87774, -12.139 |
Annual motion of Nephthys
| Date | Mon, 20 July 2026 |
| Twighlight start | 20:08 |
| Twighlight end | 02:09 |
| Twighlight duration | 6h 1m |
| Rise | 18:46 |
| Set | 05:27 |
| Elevation at transit | 40° |
| Transit time | 00:07 |
| Equatorial coordinates | RA: 20h 51m 50s", Dec: -12° 16' 13s |
| Magnitude | 11 |
| Constellation | Aquarius |
The graph illustrates the annual visibility pattern of a Nephthys, 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 Nephthys 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 Nephthys 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 287 Nephthys
Coordinates & Visibility
| Right Ascension | 20.87774° |
| Declination | -12.139° |
| Magnitude | 11.1 |
| Constellation | Aquarius |
| Elevation | -31.5° |
| Azimuth | 279° |
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.