Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 June 1981
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)
- 7
- Number of spots (f)
- 111
- Relative number (R)
- 181
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810617.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | BRI – 18 | 11 | 55W | 162 | 58W | 7.5 | |
| 2 | CAI – 21 | 8 | 08E | 99 | 05E | 9 | |
| 3 | CAI – 13 | -26 | 45W | 152 | 48W | 95 | |
| 4 | AXX – 4 | -23 | 22W | 129 | 25W | 2 | |
| 5 | DLG – 9 | -25 | 04W | 111 | 07W | 8 | |
| 6 | EKC – 44 | -30 | 13E | 94 | 70E | 145 | |
| 7 | AXX – 2 | -27 | 58E | 49 | 55E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.