Daily Sunspot Evaluation
Observation Sheet Thursday, 21 June 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)
- 11
- Number of spots (f)
- 67
- Relative number (R)
- 177
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19790621.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 20 | 25E | 318 | 22E | 37 | |
| 2 | D – 16 | -5 | 38E | 305 | 35E | 38 | |
| 3 | J – 1 | -10 | 77E | 266 | 74E | 42 | |
| 4 | A – 1 | -22 | 59E | 284 | 56E | 40 | |
| 5 | D – 2 | -27 | 54E | 292 | 48E | 39 | |
| 6 | A – 1 | -19 | 26E | 317 | 23E | 43 | |
| 7 | D – 15 | -22 | 18E | 325 | 15E | 61 | |
| 8 | A – 2 | 6 | 73W | 56 | 76W | 35 | |
| 9 | D – 14 | 22 | 47W | 30 | 50W | 27 | |
| 10 | C – 5 | 14 | 13W | 356 | 16W | 33 | |
| 11 | A – 5 | 26 | 24W | 7 | 27W | 32 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.