Daily Sunspot Evaluation
Observation Sheet Friday, 18 June 1999
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)
- 6
- Number of spots (f)
- 48
- Relative number (R)
- 108
- Observer
- TÇ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DRO – 17 | 29 | 51W | 136 | 53W | 10 | Dat-11 |
| 2 | DRI – 11 | 29 | 15W | 100 | 19W | ~6 | Cho-9 |
| 3 | CAO – 9 | 38 | 13E | 72 | 11E | ~7 | Hk-1 |
| 4 | HA – 1 | -21 | 42W | 129 | 44W | 3 | |
| 5 | DRO – 8 | -14 | 14W | 99 | 16W | 7 | |
| 6 | AX – 2 | -22 | 09W | 90 ⚠ | 09W | ~0.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.