Daily Sunspot Evaluation
Observation Sheet Saturday, 23 July 1977
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)
- 7
- Relative number (R)
- 47
- Observer
- HM
- Reading
- all checks consistent
- File
- 19770723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 20 | 08E | 186 | 05E | ||
| 2 | J – 1 | 16 | 48E | 146 | 45E | ||
| 3 | ? – 3 | -24 | 65E | 129 | 62E | ||
| 4 | A – 1 | 19 | 51W | 245 | 54W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.