Daily Sunspot Evaluation
Observation Sheet Thursday, 1 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)
- 39
- Relative number (R)
- 69
- Observer
- SK
- Reading
- all checks consistent
- File
- 19730301.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 25 | 7 | 01E | 139 | 36 | ||
| 2 | D – 6 | -13 | 35W | 175 | 39 | ||
| 3 | B – 8 | 6 | 53W | 193 | 37 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.