Daily Sunspot Evaluation
Observation Sheet Tuesday, 27 July 1971
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)
- 8
- Number of spots (f)
- 44
- Relative number (R)
- 124
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710727.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 7 | 84E | 186 | |||
| 2 | J – 1 | -7 | 28E | 242 | |||
| 3 | H – 4 | -14 | 40E | 230 | |||
| 4 | C – 4 | -13 | 04W | 274 | |||
| 5 | D – 26 | 11 | 39W | 309 | |||
| 6 | ? – 3 | 13 | 84W | 354 | |||
| 7 | A – 2 | 15 | 23W | 293 | |||
| 8 | A – 2 | 20 | 31W | 301 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.