Daily Sunspot Evaluation
Observation Sheet Tuesday, 3 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)
- 13
- Number of spots (f)
- 49
- Relative number (R)
- 179
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19810203.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 13 | 16 | 18W | 92 | 19W | 8 | |
| 2 | AXX – 2 | 15 | 02E | 72 | 01E | 0.5 | |
| 3 | HKX – 2 | 20 | 12E | 61 | 12E | 3.5 | |
| 4 | ARX – 1 | 15 | 21E | 53 | 20E | 0.75 | |
| 5 | AXX – 1 | 16 | 66E | 8 | 65E | 1 | |
| 6 | HKX – 2 | 4 | 74E | 0 | 73E | 3 | |
| 7 | AXX – 2 | -14 | 59W | 132 | 60W | 1 | |
| 8 | AXX – 1 | -10 | 56W | 130 | 57W | 0.5 | |
| 9 | DKO – 5 | -12 | 34W | 105 | 32W | 1.5 | |
| 10 | ARX – 2 | -15 | 16W | 90 | 17W | ||
| 11 | EKO – 14 | -10 | 09W | 83 | 10W | 1.5 | |
| 12 | AXX – 2 | -15 | 10E | 64 | 09E | 0.5 | |
| 13 | AXX – 2 | -13 | 32E | 42 | 31E | 2.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.