Daily Sunspot Evaluation
Observation Sheet Saturday, 16 September 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)
- 6
- Number of spots (f)
- 49
- Relative number (R)
- 109
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 10 | 12 | 36E | 132 | |||
| 2 | C – 15 | 7 | 15E | 153 | |||
| 3 | A – 2 | -11 | 53E | 115 | |||
| 4 | D – 12 | -9 | 06E | 162 | |||
| 5 | C – 9 | -12 | 17W | 185 | |||
| 6 | J – 1 | 20 | 76W | 244 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.