Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 June 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)
- 69
- Relative number (R)
- 159
- Observer
- MB
- Reading
- all checks consistent
- File
- 19900613.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 2 | 14 | 50W | 26 | 53W | 1 | 251 |
| 2 | DAC – 32 | 9 | 49W | 25 | 52W | 10 | 229 |
| 3 | EKO – 14 | 24 | 41W | 17 | 44W | 12.5 | 236 |
| 4 | AX – 2 | 24 | 11E | 325 | 08E | 0.5 | 237 |
| 5 | AR – 2 | 15 | 30E | 306 | 27E | 0.5 | 246 |
| 6 | HA – 4 | 5 | 58E | 278 | 55E | 3 | 252 |
| 7 | HH – 6 | -16 | 22E | 314 | 19E | 5.5 | 241 |
| 8 | BRI – 6 | -32 | 56E | 280 | 53E | 6 | 250 |
| 9 | ? – 1 | -10 | 77E | 259 | 74E | 2.5 | 253 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.