Daily Sunspot Evaluation
Observation Sheet Tuesday, 28 August 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)
- 23
- Relative number (R)
- 53
- Observer
- FY
- Reading
- all checks consistent
- File
- 19730828.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | S – 3 | 15 | 23E | 259 | 153 | ||
| 2 | D – 18 | 3 | 13E | 269 | 155 | ||
| 3 | ? – 2 | 13 | 71W | 353 | 150 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.