Daily Sunspot Evaluation
Observation Sheet Saturday, 29 July 1972
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)
- 7
- Number of spots (f)
- 55
- Relative number (R)
- 125
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720729.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 11 | 87E | 8 | |||
| 2 | C – 13 | -18 | 37E | 58 | |||
| 3 | B – 5 | -15 | 24E | 71 | |||
| 4 | G – 13 | -14 | 09E | 86 | |||
| 5 | A – 3 | -2 | 10W | 105 | |||
| 6 | J – 2 | 5 | 24W | 119 | |||
| 7 | E – 17 | 8 | 43W | 138 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.