Daily Sunspot Evaluation
Observation Sheet Monday, 23 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)
- 8
- Number of spots (f)
- 25
- Relative number (R)
- 105
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810223.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 15 | 65W | 238 | 68W | 2 | |
| 2 | EKC – 10 | 11 | 26W | 199 | 29W | 10 | |
| 3 | CSO – 4 | 12 | 09W | 182 | 12W | 5.5 | |
| 4 | DAO – 2 | -18 | 40E | 133 | 37E | 4.5 | |
| 5 | AXX – 1 | -14 | 46E | 127 | 43E | ||
| 6 | ARX – 1 | -5 | 50E | 123 | 47E | 0.5 | |
| 7 | DKI – 5 | -17 | 74E | 99 | 71E | 8 | |
| 8 | HAX – 1 | -8 | 76E | 97 | 73E | 1 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.