Daily Sunspot Evaluation
Observation Sheet Thursday, 30 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)
- 8
- Number of spots (f)
- 139
- Relative number (R)
- 219
- Observer
- YK
- Reading
- all checks consistent
- File
- 19910530.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BXO – 2 | 21 | 68W | 90 | 70W | 8 | 250 |
| 2 | CAO – 7 | 13 | 29W | 51 | 31W | 5.5 | 253 |
| 3 | EKI – 45 | 22 | 25W | 47 | 27W | 14 | 245 |
| 4 | DAI – 26 | 6 | 34E | 348 | 32E | 8 | 253 |
| 5 | BXO – 7 | 9 | 40E | 342 | 38E | 3.5 | 254 |
| 6 | BXO – 10 | -25 | 41W | 63 | 43W | 7 | 251 |
| 7 | HS – 1 | -14 | 03E | 19 | 01E | 2 | 249 |
| 8 | HK – 41 | -9 | 27E | 355 | 25E | 8 | 252 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.