Daily Sunspot Evaluation
Observation Sheet Friday, 16 October 1987
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)
- 53
- Relative number (R)
- 93
- Observer
- HG
- Reading
- all checks consistent
- File
- 19871016.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 34 | 22 | 05W | 193 | 07W | 9 | 78 |
| 2 | DAE – 6 | -28 | 54W | 242 | 56W | 10 | 79 |
| 3 | DAE – 10 | -24 | 23W | 211 | 25W | 10 | 81 |
| 4 | HAX – 3 | -31 | 05E | 183 | 03E | 2 | 80 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.