Daily Sunspot Evaluation
Observation Sheet Thursday, 10 May 1990
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)
- 9
- Number of spots (f)
- 64
- Relative number (R)
- 154
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900510.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CSI – 24 | 17 | 12W | 78 | 15W | 15.5 | 188 |
| 2 | AX – 2 | 14 | 26E | 40 | 23E | - | 189 |
| 3 | AR – 1 | 12 | 48E | 18 | 45E | 1 | 195 |
| 4 | ? – 2 | 21 | 70E | 356 | 67E | 2 | 198 |
| 5 | ? – 3 | -9 | 80W | 146 | 83W | 4 | 200 |
| 6 | HS – 2 | -13 | 49W | 115 | 52W | 2 | 185 |
| 7 | CAO – 15 | -13 | 27W | 93 | 30W | 10 | 191 |
| 8 | AX – 4 | -12 | 14W | 80 | 17W | 1 | 190 |
| 9 | CAI – 11 | -18 | 34E | 32 | 31E | 4.5 | 135 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.