Daily Sunspot Evaluation
Observation Sheet Tuesday, 21 November 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)
- 21
- Relative number (R)
- 81
- Observer
- ED
- Reading
- all checks consistent
- File
- 19721121.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -2 | 80E | 297 | |||
| 2 | J – 1 | -10 | 56E | 321 | |||
| 3 | C – 8 | -7 | 28E | 348 | |||
| 4 | G – 4 | -8 | 12E | 5 | |||
| 5 | C – 6 | -16 | 30W | 47 | |||
| 6 | H – 1 | -13 | 41W | 58 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.