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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:58 
Transit: 12:56 
Sunset: 20:55
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Neptune

Above the horizon.  Rise: 3:08 | Tran: 9:03 | Set: 14:59
Alt: 20.13°   Az: 118.41°   Direction: East-South-East

Neptune is in the constellation of Pisces, at a distance of 4,543,912,250.0 kilometers from Earth. The current Right Ascension is 00h 08m 14s and the Declination is -00° 30’ 45” (apparent coordinates). The magnitude of Neptune is 7.79. Check out tonight's visibility information for Neptune.

Finder Charts

Map showing Neptune in Pisces on May, 23 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Neptune in Pisces on May, 23 2025. Field of view: 15x9 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Neptune is right now. Click on the image to see a more detailed fullscreen tracker view.

Neptune
RA: 00h 06m 56s
Dec: -00° 39’ 13”
Deep sky finder chart for Neptune. Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Neptune?, a page that provides all the information needed to find Neptune in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

00h 08m 14s
-00° 30’ 45”
20h 17m 18s
20h 25m 33s

J2000

00h 06m 56s
-00° 39’ 13”

Additional Information

Pisces
7.79

Rise and Set Times

Today's rise, transit and set times of Neptune from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 90.5°
Max altitude: 38.0°
Azimuth: 269.5°
  • Neptune is above the horizon from Greenwich, UK.
  • Right now it is placed in the East-South-East direction at an altitude of 20.13° above the horizon.
  • Given its current magnitude, Neptune is visible with the help of a binocular with a 30-40mm aperture, easy with a small telescope.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Distance from Earth

The distance of Neptune from Earth is currently 4,543,912,250.0 kilometers, equivalent to 30.3741773111 Astronomical Units. Light takes 4h 12m 36.860s to travel from Neptune and arrive to us.

4,543,912,250.0
30.3741773111
4h 12m 36.860s

The following chart shows the distance of Neptune 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.

Chart of the distance of Neptune from Earth in Astronomical Units (au)

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 Neptune from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach

Between 1 January 1600 and 30 December 2499, the closest approach of Neptune to Earth happens on Thu Nov 8 2373 at a distance of 28.806366 Astronomical Units, or 4,309,370,997 kilometers:

Thu Nov 8 2373
4,309,370,997
28.806366

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 Neptune, 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.

Chart of the magnitude of Neptune as a function of time

Physical Data

The following shows the known values of the most important physical parameters of Neptune. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 49244 km 3.8647
Mass 102.41 x 1024 kg 17.1478
Density 1.638 gr/cm3 0.2971
Escape Velocity 23.56 km/s 2.1055
Sideral Rotation 16.1100 hours 0.6731
Absolute Magnitude -6.87
Geometric Albedo 0.41

15 Days Ephemeris

The following table lists the ephemerides of Neptune computed for the past and next 7 days, with a 24 hours interval. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Apparent DiameterDiameter Constellation
2025 May 16 00h 07m 37s -00° 34’ 30” 7.80 2.2” Pisces
2025 May 17 00h 07m 43s -00° 33’ 57” 7.80 2.2” Pisces
2025 May 18 00h 07m 48s -00° 33’ 24” 7.80 2.2” Pisces
2025 May 19 00h 07m 54s -00° 32’ 52” 7.79 2.2” Pisces
2025 May 20 00h 07m 59s -00° 32’ 20” 7.79 2.2” Pisces
2025 May 21 00h 08m 04s -00° 31’ 50” 7.79 2.2” Pisces
2025 May 22 00h 08m 09s -00° 31’ 19” 7.79 2.2” Pisces
2025 May 23 00h 08m 14s -00° 30’ 50” 7.79 2.2” Pisces
2025 May 24 00h 08m 19s -00° 30’ 21” 7.79 2.2” Pisces
2025 May 25 00h 08m 24s -00° 29’ 53” 7.79 2.2” Pisces
2025 May 26 00h 08m 29s -00° 29’ 25” 7.79 2.2” Pisces
2025 May 27 00h 08m 33s -00° 28’ 59” 7.79 2.2” Pisces
2025 May 28 00h 08m 38s -00° 28’ 33” 7.79 2.2” Pisces
2025 May 29 00h 08m 42s -00° 28’ 07” 7.78 2.2” Pisces

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