Daily Sunspot Evaluation
Observation Sheet Tuesday, 23 September 1997
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)
- 2
- Number of spots (f)
- 15
- Relative number (R)
- 35
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19970923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAI – 14 | -29 | 32E | 125 | 30E | 10 | 36 |
| 2 | HA – 1 | -22 | 52E | 105 | 50E | 1.5 | 37 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.