Daily Sunspot Evaluation
Observation Sheet Monday, 12 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)
- 6
- Number of spots (f)
- 40
- Relative number (R)
- 100
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19900212.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRI – 18 | 12 | 07W | 138 | 08W | 6 | 68 |
| 2 | HA – 2 | 3 | 11E | 120 | 10E | 1 | 69 |
| 3 | CKI – 10 | 18 | 20E | 111 | 19E | 7 | 63 |
| 4 | AR – 1 | 32 | 21E | 110 | 20E | 0.5 | 69 |
| 5 | BRO – 4 | -27 | 14W | 145 | 15W | 7 | 70 |
| 6 | BRO – 5 | -12 | 37E | 94 | 36E | 8 | 71 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.