Neptune Sky Charts and Coordinates
This is a simplified sky chart, showing where Neptune is now with respect to the brightest stars and constellations.
More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.
Neptune Rise and Set Times
Today's Neptune rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.
The following table lists the ephemerides of Neptune computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Neptune in our Online Planetarium at the chosen date.
|2018 Feb 17||7.96||22h 59m 05s||-07° 28’ 28”||Aquarius|
|2018 Feb 18||7.96||22h 59m 13s||-07° 27’ 38”||Aquarius|
|2018 Feb 19||7.96||22h 59m 21s||-07° 26’ 47”||Aquarius|
|2018 Feb 20||7.96||22h 59m 30s||-07° 25’ 55”||Aquarius|
|2018 Feb 21||7.96||22h 59m 39s||-07° 25’ 04”||Aquarius|
|2018 Feb 22||7.96||22h 59m 47s||-07° 24’ 12”||Aquarius|
|2018 Feb 23||7.96||22h 59m 56s||-07° 23’ 21”||Aquarius|
|2018 Feb 24||7.96||23h 00m 03s||-07° 22’ 28”||Aquarius|
|2018 Feb 25||7.96||23h 00m 11s||-07° 21’ 37”||Aquarius|
|2018 Feb 26||7.96||23h 00m 20s||-07° 20’ 44”||Aquarius|
|2018 Feb 27||7.96||23h 00m 29s||-07° 19’ 53”||Aquarius|
|2018 Feb 28||7.96||23h 00m 38s||-07° 19’ 00”||Aquarius|
|2018 Mar 01||7.96||23h 00m 46s||-07° 18’ 09”||Aquarius|
|2018 Mar 02||7.96||23h 00m 55s||-07° 17’ 17”||Aquarius|
Distance of Neptune from Earth
The following chart shows the distance of Neptune from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.
The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of Neptune is also available as a real time updated value in the Live Position and Data Tracker.
Light Curve of Neptune
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.
Neptune 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|
|Mass||102.41 x 1024 kg||17.1478|
|Escape Velocity||23.56 km/s||2.1055|
|Sideral Rotation||16.1100 hours||0.6731|