Daily Sunspot Evaluation
Observation Sheet Thursday, 17 August 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)
- 3
- Number of spots (f)
- 33
- Relative number (R)
- 63
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 8 | 45 | 08E | 78 | 05E | ||
| 2 | G – 4 | -17 | 56E | 30 | 53E | ||
| 3 | D – 21 | 21 | 35W | 121 | 38W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.