Daily Sunspot Evaluation
Observation Sheet Thursday, 4 October 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)
- 4
- Number of spots (f)
- 26
- Relative number (R)
- 66
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19731004.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 17 | -14 | 17W | 170 | 185 | ||
| 2 | B – 7 | -14 | 42W | 185 ⚠ | 186 | ||
| 3 | J – 1 | 12 | 14W | 162 | 183 | ||
| 4 | J – 1 | 22 | 45W | 198 | 184 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.