Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 January 1989
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)
- 12
- Number of spots (f)
- 101
- Relative number (R)
- 221
- Observer
- HÇ
- Reading
- all checks consistent
- File
- 19890131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 6 | 15 | 66W | 134 | 68W | 15.0 | 41 |
| 2 | DKC – 10 | 18 | 59W | 127 | 61W | 8.0 | 40 |
| 3 | DKI – 8 | 22 | 57W | 125 | 59W | 6.0 | 38 |
| 4 | AX – 2 | 37 | 04W | 72 | 06W | 3.5 | 35 |
| 5 | AR – 1 | 20 | 26E | 42 | 24E | - | 33 |
| 6 | CAO – 10 | -20 | 42W | 110 | 44W | 9.5 | 30 |
| 7 | AX – 3 | -17 | 39W | 107 | 41W | 1.5 | 28 |
| 8 | AX – 1 | -15 | 28W | 96 | 30W | - | 25 |
| 9 | EKC – 25 | -19 | 28W | 96 | 30W | 12.0 | 23 |
| 10 | EKC – 33 | -21 | 13E | 55 | 11E | 12.0 | 21 |
| 11 | HS – 1 | -21 | 70E | 358 | 68E | 2.0 | 19 |
| 12 | AX – 1 | -18 | 81E | 347 | 79E | - | 17 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.