Daily Sunspot Evaluation
Observation Sheet Monday, 17 October 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)
- 5
- Number of spots (f)
- 25
- Relative number (R)
- 75
- Observer
- FA
- Reading
- all checks consistent
- File
- 19771017.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 24 | 27E | 108 | 22E | ||
| 2 | B – 7 | 18 | 38W | 174 | 38W | ||
| 3 | J – 4 | 18 | 24W | 159 | 24W | ||
| 4 | A – 2 | 23 | 25W | 160 | 25W | ||
| 5 | D – 5 | 23 | 12W | 147 | 12W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.