Daily Sunspot Evaluation
Observation Sheet Sunday, 15 May 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)
- 9
- Relative number (R)
- 39
- Observer
- FA
- Reading
- all checks consistent
- File
- 19770515.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 31 | 09E | 19 | 05E | ||
| 2 | B – 5 | -22 | 23E | 5 | 19E | ||
| 3 | C – 2 | -21 | 09E | 19 | 05E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.