Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 August 1977
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)
- 18
- Relative number (R)
- 48
- Observer
- GA
- Reading
- all checks consistent
- File
- 19770817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 28 | 07E | 214 | 07E | ||
| 2 | C – 4 | 23 | 45E | 176 | 45E | ||
| 3 | C – 7 | 20 | 21W | 242 | 21W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.