Daily Sunspot Evaluation
Observation Sheet Saturday, 15 May 1971
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)
- 5
- Number of spots (f)
- 32
- Relative number (R)
- 82
- Observer
- MA
- Reading
- all checks consistent
- File
- 19710515.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 6 | 3 | 01E | 158 | |||
| 2 | C – 5 | 12 | 16E | 143 | |||
| 3 | H – 17 | 5 | 28E | 131 | |||
| 4 | B – 3 | 5 | 60W | 219 | |||
| 5 | J – 1 | 19 | 39W | 198 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.