Neptune Ephemeris Generator 3.0

2022-08-03: Release 3.0 with new options and support for JWST. See the help page for more information.

The current ephemeris selection is NEP095 + NEP097 + NEP101 + DE440.

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

Time Limits

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

Viewpoint:

Observatory: Earth's center HST JWST Apache Point Observatory (32.780361, -105.820417, 2674.) Kitt Peak National Observatory (31.958833, -111.594694, 2058.4) Lowell Observatory (35.097, -111.537, 2200.) Mauna Kea Observatory (19.827, -155.472, 4215.) McDonald Observatory (30.671500, -104.022611, 2076.) Mt. Evans Observatory (39.587, -105.640, 4305.) NMSU Observatory (32.27631, -106.746556, 0.) Paranal Observatory/VLT (-24.625417, -70.402806, 2635.) Yerkes Observatory (41.098, 88.557, 334.)
Lat: Lon: east west Alt: (m)

General Column Selection:

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

Moon Column Selection:

Sub-observer latitude & rotating longitude (deg)
Sub-solar latitude & rotating longitude (deg)
RA (hours) & Dec (deg)
Offset RA & Dec from the moon (arcsec)
Orbital longitude relative to observer (deg)
Orbit plane opening angle to observer (deg)

Moon Selection:

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

Output to:   Webpage & link    Direct to table