Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 May 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)
- 8
- Number of spots (f)
- 59
- Relative number (R)
- 139
- Observer
- HÇ0
- Reading
- all checks consistent
- File
- 19990518.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 22 | 77W | 212 | 80W | 5 | |
| 2 | EAI – 17 | 21 | 56W | 191 | 59W | 12 | |
| 3 | CRI – 4 | 24 | 44W | 179 | 47W | 4 | |
| 4 | HH – 5 | 35 | 35E | 100 | 32E | 6 | |
| 5 | ? – 5 | -33 | 75W | 210 | 78W | 6 | |
| 6 | HS – 1 | -20 | 10W | 145 | 13W | 15 | |
| 7 | EAI – 18 | -21 | 16E | 119 | 13E | 13 | |
| 8 | CRI – 7 | -22 | 45E | 90 | 42E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.