Daily Sunspot Evaluation
Observation Sheet Thursday, 5 February 1981
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)
- 10
- Number of spots (f)
- 58
- Relative number (R)
- 158
- Observer
- TÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810205.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 16 | 45W | 95 | 48W | 1 | |
| 2 | HKX – 1 | 20 | 11W | 61 | 14W | 3.25 | |
| 3 | DAO – 10 | 3 | 52E | 358 | 49E | 06 | |
| 4 | BAO – 2 | 28 | 57E | 393 ⚠ | 54E | 4 | |
| 5 | ? – 8 | 12 | 75E | 235 ⚠ | 72E | ||
| 6 | DAO – 5 | -13 | 56W | 106 | 59W | 11.5 | |
| 7 | EKO – 15 | -11 | 34W | 84 | 37W | 14.5 | |
| 8 | BAI – 8 | -15 | 15W | 65 | 18W | 4.5 | |
| 9 | BAI – 5 | -3 | 09W | 59 | 12W | 4 | |
| 10 | AXX – 3 | -16 | 03W | 53 | 06W | 1.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.