Daily Sunspot Evaluation
Observation Sheet Thursday, 2 May 1991
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)
- 7
- Number of spots (f)
- 43
- Relative number (R)
- 113
- Observer
- YK
- Reading
- all checks consistent
- File
- 19910502.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 8 | 07W | 42 | 11W | 0.5 | 193 |
| 2 | CAI – 17 | 7 | 01E | 34 | 03W | 9 | 196 |
| 3 | CAO – 6 | -28 | 52W | 87 | 56W | 7 | 200 |
| 4 | HS – 1 | -22 | 10E | 25 | 06E | 1.5 | 199 |
| 5 | HS – 1 | -6 | 19E | 16 | 15E | 1 | 202 |
| 6 | AX – 4 | -9 | 45E | 350 | 4E | 3 | 204 |
| 7 | DAI – 12 | -13 | 49E | 346 | 45E | 12 | 203 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.