Daily Sunspot Evaluation
Observation Sheet Sunday, 17 September 1978
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 10
- Number of spots (f)
- 83
- Relative number (R)
- 183
- Observer
- GT
- Reading
- all checks consistent
- File
- 19780917.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 5 | 37 | 04E | 31 | 03E | ||
| 2 | G – 10 | 29 | 16E | 19 | 15E | ||
| 3 | F – 33 | 37 | 26E | 9 | 25E | ||
| 4 | J – 3 | 31 | 28E | 7 | 27E | L | |
| 5 | J – 1 | 26 | 84E | 311 | 83E | L | |
| 6 | J – 3 | -20 | 57E | 338 | 56E | L | |
| 7 | D – 18 | -27 | 26E | 9 | 25E | ||
| 8 | A – 5 | -16 | 16W | 51 | 17W | L | |
| 9 | H – 3 | 16 | 36W | 71 | 37W | ||
| 10 | ? – 2 | 30 | 71W | 106 | 72W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.