Daily Sunspot Evaluation
Observation Sheet Thursday, 1 October 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)
- 80
- Relative number (R)
- 210
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19811001.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKO – 9 | 8 | 45W | 190 | 47W | 11 | |
| 2 | DAI – 9 | 6 | 13W | 158 | 15W | 7.5 | |
| 3 | DAO – 3 | 17 | 03E | 142 | 01E | 9 | |
| 4 | DAO – 10 | 15 | 13E | 132 | 11E | 7 | |
| 5 | CAI – 11 | 12 | 33E | 112 | 31E | 6 | |
| 6 | ? – 2 | 8 | 78E | 67 | 76E | - | |
| 7 | HSX – 1 | -10 | 54W | 199 | 56W | 15 | |
| 8 | CAI – 12 | -7 | 49W | 192 | 49W | 9 | |
| 9 | HAX – 1 | -14 | 40W | 185 | 42W | 2 | |
| 10 | HAX – 8 | -6 | 12W | 157 | 14W | 4 | |
| 11 | HAX – 2 | -17 | 20E | 125 | 18E | 2 | |
| 12 | CAI – 11 | -17 | 42E | 103 | 40E | 11 | |
| 13 | ? – 1 | -7 | 78E | 72 ⚠ | 71E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.