Daily Sunspot Evaluation
Observation Sheet Sunday, 10 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)
- 11
- Number of spots (f)
- 26
- Relative number (R)
- 136
- Observer
- SB0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19991010.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 2 | 13 | 61W | 39 ⚠ | 63W | 3° | |
| 2 | HA – 2 | 20 | 29W | 49 | 29W | 2° | |
| 3 | AX – 2 | 17 | 21E | 356 | 19E | 1° | |
| 4 | EKI – 10 | 22 | 62E | 316 | 60E | ~13.5 | |
| 5 | HA – 1 | -21 | 34W | 52 | 36W | 2° | |
| 6 | HA – 1 | -19 | 28W | 46 | 30W | 1° | |
| 7 | HA – 1 | -24 | 11E | 9 | 09E | ~1.5 | HS-1 |
| 8 | AX – 2 | -10 | 19E | 1 | 15E | 1.5 | |
| 9 | AX – 3 | 10 | 62E | 316 | 60E | 3° | |
| 10 | AX – 1 | 14 | 62E | 316 | 60E | - | |
| 11 | AX – 1 | 21 | 30(W) | 5 | 34(W) | - |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.