Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 September 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)
- 6
- Number of spots (f)
- 22
- Relative number (R)
- 82
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19900925.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 7 | 13 | 15E | 26 | 12E | 13 | 435 |
| 2 | DAI – 3 | -13 | 62W | 103 | 65W | 3 | 436 |
| 3 | BRO – 2 | -8 | 38W | 79 | 41W | 5.5 | 441 |
| 4 | HS – 1 | -24 | 12W | 53 | 15W | 2 | 442 |
| 5 | EKC – 8 | -7 | 48E | 353 | 45E | 11.5 | 447 |
| 6 | HA – 1 | -43 | 58E | 343 | 55E | 1 | 450 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.