Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 August 1979
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)
- 142
- Relative number (R)
- 302
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 4 | 16 | 02E | 254 | 01W | 150 | |
| 2 | F – 37 | 5 | 66E | 190 | 63E | 157 | |
| 3 | B – 6 | 7 | 18E | 238 | 15E | 158 | |
| 4 | D – 9 | -13 | 33E | 223 | 30E | 155 | |
| 5 | B – 7 | -21 | 44E | 212 | 41E | 156 | |
| 6 | D – 7 | -32 | 61E | 195 | 58E | 160 | |
| 7 | B – 2 | -15 | 20E | 236 | 17E | 159 | |
| 8 | C – 15 | -15 | 05E | 251 | 02E | 161 | |
| 9 | F – 29 | -27 | 15W | 271 | 18W | 148 | |
| 10 | B – 4 | -14 | 08W | 264 | 11W | 162 | |
| 11 | J – 2 | -24 | 33W | 289 | 36W | 146 | |
| 12 | A – 3 | -15 | 30W | 286 | 33W | 163 | |
| 13 | ? – 2 | 13 | 85W | 341 | 88W | 152 | |
| 14 | J – 3 | 17 | 42W | 298 | 45W | 145 | |
| 15 | D – 10 | 26 | 22W | 278 | 25W | 154 | |
| 16 | B – 2 | 27 | 08W | 264 | 11W | 164 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.