Neptune - Voyager 2

The Great Dark Spot on Neptune, green filter image from 3.9 million km

Voyager 2 green filter image of Neptune showing the Great Dark Spot (GDS). The GDS is an anticyclonic weather system roughly the size of Earth. Centered at 20 S, the system rotates counterclockwise with a 16 day period. The bright clouds are about 100 km higher in altitude than the GDS. The image was taken from about 4 million km and measures approximately 29,000 km on a side. Neptune is 49,500 km in diameter and north is at 1:00. (Voyager 2, 11314.35)
Larger image: 355K

High resolution tiff file (1.0M)

Location & Time Information
Date/Time (UT): 1989-08-22 T 15:22:21
Distance/Range (km): 3,900,000.
Central Latitude/Longitude (deg): N/A
Orbit(s): flyby

Imaging Information
Area or Feature Type: clouds, Great Dark Spot
Instrument: Narrow-angle Vidicon Camera
Instrument Resolution (pixels): 800 x 800, 8 bit
Instrument Field of View (deg): 0.424 x 0.424
Filter: green
Illumination Incidence Angle (deg): N/A
Phase Angle (deg): N/A
Instrument Look Direction: N/A
Surface Emission Angle (deg): N/A

Ordering Information
CD-ROM Volume: VG_0010
NASA Image ID number: FDS 11314.35
Other Image ID number: 0851N2-003
NSSDC Data Set ID (Photo): 77-076A-01T
NSSDC Data Set ID (CD): 77-076A-01f
Other ID: N/A


[NASA Logo] Authors/Curators:

Dave Williams,, (301) 286-1258
Code 690.1, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

Jay Friedlander,, (301) 286-7172
Code 612.4, NASA Goddard Space Flight Center
Greenbelt, MD 20771, USA

NASA Official: Ed Grayzeck,

Last updated: 24 September 2015