Daily Sunspot Evaluation
Observation Sheet Saturday, 13 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)
- 47
- Relative number (R)
- 167
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900113.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HS – 1 | 12 | 23E | 144 | 21E | 0.5 | 10 |
| 2 | DSI – 4 | 33 | 57E | 110 | 55E | 7.5 | 20 |
| 3 | CAI – 5 | 20 | 62E | 105 | 60E | 8 | 21 |
| 4 | DAO – 7 | -13 | 65W | 232 | 67W | 9.5 | 15 |
| 5 | CAI – 5 | -24 | 65W | 232 | 67W | 10.5 | 13 |
| 6 | CAO – 3 | -13 | 40W | 207 | 42W | 14.5 | 9 |
| 7 | AR – 1 | -7 | 25W | 192 | 27W | 0.5 | 23 |
| 8 | HA – 4 | -23 | 23W | 190 | 25W | 2.5 | 10 |
| 9 | CAI – 9 | -11 | 02W | 169 | 04W | 6.5 | 14 |
| 10 | CAO – 6 | -35 | 35E | 132 | 33E | 9.5 | 16 |
| 11 | HS – 1 | -30 | 56E | 111 | 54E | 1 | 19 |
| 12 | HS – 1 | -20 | 62E | 105 | 60E | 1 | 22 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.