Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 5
- Number of spots (f)
- 36
- Relative number (R)
- 86
- Observer
- NA
- Reading
- all checks consistent
- File
- 19990513.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HH – 6 | 21 | 16W | 217 | 18W | ~6 | HK-6 |
| 2 | ESI – 17 | 21 | 08E | 193 | 06E | ~13 | |
| 3 | HS – 1 | -19 | 54E | 147 | 52E | ~2 | |
| 4 | HR – 1 | -29 | 00 | 201 | 02W | ~1 | Ha-1 |
| 5 | DAC – 11 | -18 | 25W | 226 | 29W | ~6.5 | Dai-11 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.