| Member Name/Aliases | Datatype | Description |
| nChunk | int32 | Number of chunk objects |
| nRun | int32 | Number of run objects |
| nSegment | int32 | Number of segments |
| nField | int32 | Number of fields |
| nPhotoObj | int32 | Number of Photo Objects |
| nPrimary | int32 | Number of Primary Photo Objects |
| nSecondary | int32 | Number of Secondary Photo Objects |
| nFamily | int32 | Number of Family Objects |
| nStar | int32 | Number of objects classified as stars |
| nGalaxy | int32 | Number of objects classified as galaxies |
| nSky | int32 | Number of objects classified as sky |
| nUnknown | int32 | Number of objects classified as unknown |
| nStarSec | int32 | Number of secondary objects classified as star |
| nGalaxySec | int32 | Number of secondary objects classified as galaxy |
| nSkySec | int32 | Number of secondary objects classified as sky |
| nUnknownSec | int32 | Number of secondary objects classified as unknown |
| nExternal | int32 | Number of external objects |
| nPlate | int32 | Number of plates |
| nSpecObj | int32 | Number of spectra |
| nSpecLine | int32 | Number of spectral lines |
| nSpecLineIndex | int32 | Number of spectral line indices |