Daily Sunspot Evaluation
Observation Sheet Sunday, 25 February 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)
- 15
- Number of spots (f)
- 133
- Relative number (R)
- 283
- Observer
- TÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19900225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 13 | 4 | 57W | 13 ⚠ | 54W | 11.5 | 83 |
| 2 | BXI – 6 | 18 | 39W | 1 | 42W | 10 | 89 |
| 3 | BXI – 4 | 21 | 12W | 334 | 15W | 5 | 94 |
| 4 | EKC – 29 | 17 | 12E | 310 | 09E | 13.5 | 85 |
| 5 | AX – 1 | 25 | 65E | 257 | 62E | - | 36 |
| 6 | BXO – 2 | 12 | 66E | 256 | 63E | 7 | 97 |
| 7 | BXI – 5 | -3 | 38W | 0 | 41W | 4 | 88 |
| 8 | HS – 1 | -10 | 22W | 334 ⚠ | 25W | 2 | 77 |
| 9 | BXI – 18 | -37 | 09W | 331 | 12W | 18 | 81 |
| 10 | HS – 1 | -13 | 04W | 326 | 07W | 2 | 82 |
| 11 | DKC – 33 | -17 | 08E | 314 | 05E | 10 | 84 |
| 12 | BRO – 5 | -23 | 22E | 300 | 19E | 4 | 98 |
| 13 | CKI – 11 | -10 | 32E | 290 | 29E | 10.5 | 93 |
| 14 | HA – 3 | -18 | 55E | 267 | 52E | 2.5 | 95 |
| 15 | ? – 1 | -20 | 79E | 243 | 76E | 3 | 99 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.