Daily Sunspot Evaluation
Observation Sheet Wednesday, 13 October 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)
- 12
- Number of spots (f)
- 131
- Relative number (R)
- 251
- Observer
- AK0
- Reading
- all checks consistent
- File
- 19991013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HH – 1 | 22 | 65W | 44 | 68W | ~3 | |
| 2 | AX – 1 | 24 | 21W | 0 | 24W | 0.5 | |
| 3 | CRI – 12 | 19 | 14W | 353 | 17W | 8 | Cai-12 |
| 4 | AX – 3 | 24 | 04W | 343 | 07W | 3.5 | Bro-3 |
| 5 | AX – 7 | 9 | 20E | 319 | 17E | 3.5 | Cro-7 |
| 6 | EHC – 39 | 22 | 22E | 317 | 19E | 12 | |
| 7 | ESC – 18 | 12 | 31E | 308 | 28E | 11.5 | Eof-18 |
| 8 | CAI – 13 | 19 | 39E | 300 | 36E | 9 | |
| 9 | EHC – 31 | 11 | 48E | 291 | 45E | 12 | Eke-31 |
| 10 | HS – 1 | -21 | 73W | 52 | 76W | - | |
| 11 | HS – 1 | -23 | 28W | 7 | 26E | 1 | |
| 12 | AX – 4 | -13 | 23E | 316 | 20E | ~3 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.