Daily Sunspot Evaluation
Observation Sheet Monday, 15 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)
- 66
- Relative number (R)
- 136
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810615.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 3 | 13 | 41W | 175 | 44W | 2 | |
| 2 | CRI – 6 | 12 | 27W | 161 | 30W | 4.75 | |
| 3 | DAF – 14 | 7 | 35E | 99 | 32E | 65 | |
| 4 | DAO – 8 | -25 | 17W | 151 | 20W | 13 | |
| 5 | CAO – 9 | -23 | 05E | 129 | 02E | 7 | |
| 6 | DKO – 8 | -26 | 23E | 111 | 20E | 25 | |
| 7 | DRE – 18 | -21 | 39E | 95 | 36E | 8E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.