Daily Sunspot Evaluation
Observation Sheet Friday, 23 March 1973
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)
- 3
- Number of spots (f)
- 21
- Relative number (R)
- 51
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730323.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 12 | 17E | 194 | 51 | ||
| 2 | H – 6 | 6 | 65E | 146E | 50 | ||
| 3 | H – 14 | 15 | 13W | 224E | 48 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.