Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 23
- Relative number (R)
- 73
- Observer
- FA
- Reading
- all checks consistent
- File
- 19771013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 3 | 19 | 31E | 160 | 28E | ||
| 2 | ? – 1 | 24 | 79E | 112 | 76E | ||
| 3 | D – 14 | 6 | 16W | 207 | 19W | ||
| 4 | A – 2 | 18 | 70W | 261 | 73W | ||
| 5 | A – 3 | 29 | 08W | 199 | 11W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.