Daily Sunspot Evaluation
Observation Sheet Sunday, 23 September 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)
- 5
- Number of spots (f)
- 32
- Relative number (R)
- 82
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730923.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 22 | 14 | 46E | 253 | 175 | ||
| 2 | A – 3 | 10 | 45E | 254 | 173 | ||
| 3 | J – 2 | 5 | 39E | 260 | 176 | ||
| 4 | A – 3 | 5 | 17E | 282 | 179 | ||
| 5 | J – 2 | 15 | 29W | 328 | 170 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.