Daily Sunspot Evaluation
Observation Sheet Monday, 21 August 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)
- 5
- Number of spots (f)
- 45
- Relative number (R)
- 95
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 14 | 10 | 41E | 111 | |||
| 2 | C – 14 | -4 | 43E | 109 | |||
| 3 | ? – 4 | -14 | 70E | 82 | |||
| 4 | H – 6 | -24 | 15W | 167 | |||
| 5 | B – 7 | -11 | 31W | 183 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.