Daily Sunspot Evaluation
Observation Sheet Sunday, 23 August 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)
- 16
- Number of spots (f)
- 146
- Relative number (R)
- 306
- Observer
- HM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810823.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 7 | 71W | 11 | 73W | ||
| 2 | DAI – 23 | 10 | 09W | 309 | 11W | 8 | |
| 3 | DAI – 11 | 12 | 27E | 273 | 25E | 8.5 | |
| 4 | DAI – 11 | 20 | 55E | 245 | 53E | 8 | |
| 5 | DAO – 6 | 15 | 76E | 224 | 74E | 11 | |
| 6 | ? – 2 | 17 | 37E | 213 ⚠ | 85E | ? | |
| 7 | DAO – 5 | -15 | 65W | 5 | 67W | 14 | |
| 8 | HHX – 2 | -2 | 26W | 326 | 28W | 3 | |
| 9 | CKI – 9 | -18 | 22W | 322 | 24W | 10.5 | |
| 10 | CRI – 10 | -2 | 04E | 296 | 02E | 5 | |
| 11 | CRI – 19 | -8 | 05E | 295 | 03E | 6.5 | |
| 12 | ARX – 3 | -17 | 12E | 288 | 10E | 1.5 | |
| 13 | CAI – 18 | -13 | 14E | 283 | 15E | 10 | |
| 14 | DAI – 17 | -9 | 35E | 265 | 33E | 12 | |
| 15 | AXX – 6 | -5 | 51E | 249 | 49E | 3 | |
| 16 | AXX – 3 | -24 | 59E | 241 | 57E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.