Daily Sunspot Evaluation
Observation Sheet Thursday, 24 September 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)
- 14
- Number of spots (f)
- 27
- Relative number (R)
- 167
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810924.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ARX – 1 | 12 | 79W | 314 | 79W | - | |
| 2 | HSX – 1 | 11 | 58W | 294 | 59W | 1.5 | |
| 3 | DKI – 8 | 10 | 22W | 258 | 23W | 8.5 | |
| 4 | AXX – 1 | 18 | 10E | 224 | 11E | - | |
| 5 | AXX – 1 | 15 | 22E | 214 | 21E | - | |
| 6 | AXX – 2 | 15 | 34E | 202 | 33E | 0.5 | |
| 7 | ARX – 1 | -23 | 85W | 231 ⚠ | 36W | - | |
| 8 | HKX – 1 | -10 | 18W | 254 | 19W | 3.5 | |
| 9 | ARX – 3 | -9 | 05E | 231 | 04E | 1 | |
| 10 | HAX – 3 | -10 | 38E | 198 | 37E | 3 | |
| 11 | BXO – 2 | -8 | 50E | 186 | 49E | .6 | |
| 12 | HSX – 1 | -15 | 51E | 185 | 50E | 2 | |
| 13 | HAX – 1 | -15 | 65E | 171 | 64E | 2 | CAO 2 |
| 14 | ? – 1 | -15 | 72E | 164 | 71E | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.