Daily Sunspot Evaluation
Observation Sheet Friday, 12 January 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)
- 12
- Number of spots (f)
- 65
- Relative number (R)
- 185
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19900112.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAI – 8 | 27 | 74W | 255 | 77W | 12 | 3 |
| 2 | HS – 1 | 12 | 36E | 145 | 33E | 1 | 12 |
| 3 | AX – 2 | 33 | 69E | 112 | 66E | 0.5 | 20 |
| 4 | DAO – 3 | 21 | 75E | 106 | 72E | 6 | 21 |
| 5 | DKC – 11 | -13 | 51W | 232 | 54W | 9.5 | 15 |
| 6 | BAI – 9 | -24 | 51W | 232 | 54W | 11 | 13 |
| 7 | CAI – 10 | -13 | 26W | 207 | 29W | 16.5 | 9 |
| 8 | HS – 1 | -22 | 10W | 191 | 13W | 2.5 | 10 |
| 9 | DAI – 9 | -10 | 11E | 170 | 08E | 6 | 14 |
| 10 | CAO – 7 | -34 | 47E | 134 | 44E | 9 | 16 |
| 11 | HA – 2 | -29 | 69E | 112 | 66E | 1.5 | 19 |
| 12 | HA – 2 | -19 | 75E | 106 | 72E | 3 | 22 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.