Daily Sunspot Evaluation
Observation Sheet Tuesday, 4 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)
- 28
- Relative number (R)
- 78
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 22 | 13 | 35E | 270 | |||
| 2 | J – 1 | 11 | 52E | 253 | |||
| 3 | A – 1 | 8 | 60E | 245 | |||
| 4 | B – 3 | -13 | 58E | 247 | |||
| 5 | J – 1 | -6 | 42W | 347 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.