Daily Sunspot Evaluation
Observation Sheet Thursday, 29 January 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)
- 11
- Number of spots (f)
- 58
- Relative number (R)
- 168
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810129.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRO – 3 | 11 | 53W | 192 | 52W | 2.5 | |
| 2 | AXX – 1 | 21 | 34W | 173 | 33W | ||
| 3 | DKO – 9 | 16 | 50E | 89 | 51E | 6.5 | |
| 4 | ? – 3 | 15 | 70E | 69 | 71E | ||
| 5 | ? – 2 | 20 | 77E | 62 | 78E | ||
| 6 | AXX – 1 | -5 | 49W | 188 | 48W | ||
| 7 | CSO – 6 | -29 | 47W | 186 | 46W | 9.5 | |
| 8 | AXX – 1 | -18 | 19E | 120 | 20E | ||
| 9 | DKC – 15 | -11 | 38E | 101 | 39E | 10 | |
| 10 | CRO – 7 | -16 | 53E | 86 | 54E | 8 | |
| 11 | EKC – 10 | -10 | 59E | 80 | 60E | 4.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.