Neptune Ephemeris Generator 2.8

2021-06-20: Release 2.8 with updated ephemerides.

Click here for help, or click on individual highlighted items.
Current ephemeris selection is NEP081 + NEP095 + DE440.

• Triton & Nereid, 1600 to 2600.
• Small inner satellites, 1900 to 2050.

Start time:
Stop time:
Interval: seconds minutes hours days

Modified Julian Date (UTC)
Year, Month, Day, Hour, Minute (UTC)
Year, Month, Day, Hour, Minute, Second (UTC)
Neptune RA (hours) & Dec (deg)
Neptune phase angle (deg)
Ring opening angle to the Sun (deg)
Ring opening angle to Earth (deg)
Sub-solar inertial longitude (deg, J2000)
Sub-Earth inertial longitude (deg, J2000)
Sub-solar latitude & rotating longitude (deg)
Sub-Earth latitude & rotating longitude (deg)
Neptune projected equatorial radius (arcsec)
Sun-Neptune distance (km)
Earth-Neptune distance (km)
Lunar phase angle (deg)
Sun-Neptune sky separation angle (deg)
Moon-Neptune sky separation angle (deg)

Moon Columns:

RA (hours) & Dec (deg)
Offset RA & Dec from Neptune (arcsec)
Sub-solar latitude & rotating longitude (deg)*
Sub-Earth latitude & rotating longitude (deg)*

Triton (N1) Nereid (N2) Naiad (N3) Thalassa (N4) Despina (N5) Galatea (N6) Larissa (N7) Proteus (N8) Hippocamp (N14)