Daily Sunspot Evaluation
Observation Sheet Saturday, 24 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)
- 13
- Number of spots (f)
- 124
- Relative number (R)
- 254
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900224.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ESO – 12 | 4 | 38W | 13 | 40W | 11.5 | 83 |
| 2 | DAI – 8 | 18 | 26W | 1 | 28W | 8.5 | 89 |
| 3 | AX – 4 | 20 | 00 | 335 | 02W | 3.5 | 94 |
| 4 | EKC – 27 | 16 | 24E | 311 | 22E | 12 | 85 |
| 5 | AX – 1 | -9 | 67W | 42 | 69W | - | 86 |
| 6 | AX – 1 | -18 | 62W | 37 | 64W | - | 91 |
| 7 | AX – 3 | -3 | 27W | 2 | 29W | - | 88 |
| 8 | HS – 1 | -10 | 10W | 345 | 12W | 2 | 77 |
| 9 | CAI – 15 | -37 | 02E | 333 | 00 | 18 | 81 |
| 10 | HS – 1 | -13 | 07E | 328 | 05E | 2 | 82 |
| 11 | EKC – 31 | -17 | 19E | 316 | 17E | 11 | 84 |
| 12 | CAI – 16 | -10 | 44E | 291 | 42E | 10 | 93 |
| 13 | CAO – 4 | -18 | 68 | 267 | 66E | 11 | 95 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.