Daily Sunspot Evaluation
Observation Sheet Monday, 2 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)
- 65
- Relative number (R)
- 145
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810202.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BAI – 13 | 15 | 01W | 88 | 05W | 10 | |
| 2 | ARX – 1 | 15 | 16E | 71 | 14E | 0.5 | |
| 3 | HIX – 5 | 19 | 28E | 59 | 26E | 5.5 | |
| 4 | ARX – 1 | 15 | 36E | 51 | 34E | 0.75 | |
| 5 | EAO – 10 | -13 | 14W | 101 | 16W | 12.5 | |
| 6 | AXX – 2 | -7 | 13W | 100 | 15W | 0.5 | |
| 7 | DHO – 9 | -18 | 02E | 85 | 00 | 7.25 | |
| 8 | EKO – 24 | -11 | 07E | 80 | 05E | 12.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.