Daily Sunspot Evaluation
Observation Sheet Thursday, 28 July 1966
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)
- 6
- Number of spots (f)
- 31
- Relative number (R)
- 91
- Observer
- SK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19660728.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 35 | 35E | 205 | |||
| 2 | H – 10 | 25 | 68E | 172 | |||
| 3 | H – 6 | 29 | 16W | 256 | |||
| 4 | H – 3 | 37 | 39W | 272 ⚠ | |||
| 5 | B – 10 | 38 | 20W | 260 | |||
| 6 | A – 1 | 37 | 06W | 246 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.