Daily Sunspot Evaluation
Observation Sheet Wednesday, 23 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)
- 15
- Number of spots (f)
- 61
- Relative number (R)
- 211
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 6 | 20 | 79W | 330 | 31W | ||
| 2 | BXO – 3 | 13 | 60W | 311 | 62W | ||
| 3 | HAX – 2 | 10 | 43W | 284 ⚠ | 45W | ||
| 4 | BXO – 11 | 10 | 22W | 273 | 24W | ||
| 5 | HKX – 14 | 11 | 07W | 258 | 09W | ||
| 6 | AXX – 2 | 17 | 03W | 254 | 05W | ||
| 7 | BXO – 4 | 21 | 01W | 252 | 03W | ||
| 8 | AXX – 1 | 16 | 37E | 214 | 35E | ||
| 9 | AXX – 1 | -6 | 50W | 301 | 52W | ||
| 10 | AXX – 2 | -7 | 38W | 279 ⚠ | 40W | ||
| 11 | CAO – 3 | -22 | 22W | 273 | 24W | ||
| 12 | DKO – 7 | -7 | 01W | 252 | 03W | ||
| 13 | AXX – 2 | -8 | 21E | 230 | 19E | ||
| 14 | HAX – 2 | -10 | 54E | 197 | 52E | ||
| 15 | HKX – 1 | -15 | 66E | 185 | 64E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.