Neptune Observation Details
Neptune Daily Motion
Neptune will be visible throughout the entire night. It will rise at 17:17, just before twilight begins, and will be at 10° when twilight starts at 18:06. It will reach its transit at 54° at 23:19, and will fade away as twilight ends at 03:56, being at 17° elevation.Neptune will be visible until March, 5, 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.
Neptune Visibility Timetable on September 19
Neptune Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 11.6% illuminated | 01:35 | 42° |
| Moon Set | 15:52 | -17° |
| Neptune rise | 17:17 | |
| Civil sunset | 17:36 | 4° |
| Astrosession begin | 18:37 | 16° |
| Neptune transit | 23:19 | 54° |
| Astrosession end | 03:25 | 23° |
| Civil sunrise | 04:27 | 11° |
| Sunrise | 04:54 | 5° |
| Neptune set | 05:21 |
Track Neptune Position Throughout the Night
← Fri, 19 September 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Neptune changing position in the night sky.
Where is Neptune right now?
Neptune is located in the constellation Pisces, at right ascension 00h 05m 27s" and declination 00° 54' 20s, approximately 28.89 AU (4,321,882,485 km) from Earth. At the current time, it is below the horizon and not visible from your location.Upcoming Events
| Time | Description | Constellation |
|---|---|---|
| Wed, 24 September 2025 | Neptune is in Opposition | Pisces |
| Sun, 5 October 2025, 22:17 | Close approach of Neptune and the Moon. Distance - 2.8°, position - 52° above the horizon at South | Pisces |
| Sat, 29 November 2025, 17:09 | Close approach of Neptune and the Moon. Distance - 3°, position - 47° above the horizon at South-Southwest | Pisces |
| Wed, 10 December 2025 | Retrograde motion of Neptune ends | Pisces |
Current position of Neptune in Solar System
| Date | Fri, 19 September 2025 |
| Distance from Earth to Neptune | 28.886 AU (4,321,284,093km) |
| Elongation | 175° |
| Angular diameter | 2.4" |
| Magnitude | 7.7 |
Finder Chart for Neptune
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| Object name | Neptune |
| Field of view | |
| Limiting magnitude | |
| Neptune coordinates | 0.09088, 0.90575 |
| Center coordinates | 0.09088, 0.90575 |
Neptune Passage Through Night
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Current position of Neptune
| Time | 08:47 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Neptune elevation | -38° |
| Neptune Azimuth | 52° |
Here you can see the current position of the Neptune on the map, as well as its positions for rise and set. This tool allows you to track the Neptune's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of Neptune
| Date | Fri, 19 September 2025 |
| Twighlight start | 18:33 |
| Twighlight end | 03:19 |
| Twighlight duration | 9h 46m |
| Rise | 17:17 |
| Set | 05:21 |
| Elevation at transit | 54° |
| Transit time | 23:19 |
| Equatorial coordinates | RA: 00h 05m 25s", Dec: 00° 54' 31s |
| Magnitude | 8 |
| Constellation | Pisces |
The graph illustrates the annual visibility pattern of a Neptune, 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 Neptune 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 Neptune 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 Neptune
Coordinates & Visibility
| Right Ascension | 0.09088° |
| Declination | 0.90575° |
| Magnitude | 7.7 |
| Constellation | Pisces |
| Elevation | -37.8° |
| Azimuth | 51.9° |
Basic Properties
| Mass, kg | 1.02409E+26 |
| Mean density, g/cm³ | 1.638 |
Orbit
| Orbital period, days | 60189 d |
Rotation
| Sidereal rotation period, days | 16.11+-0.01 hr |
Surface & Atmosphere
| Surface gravity, m/s² | 11.41+-0.03 |
| Escape velocity, km/s | 23.5 km/s |
| Mean temperature, K | 72+-2 K |
Brightness
| Visual magnitude V(1,0) | -6.87 |
Data Acknowledgment
Our solar system data—including planetary physical and orbital parameters—comes from the Solar System OpenData API , maintained by Le Système Solaire. We thank Christophe and the contributors for making this open data available.