Daily Sunspot Evaluation
Observation Sheet Monday, 13 September 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)
- 99
- Relative number (R)
- 179
- Observer
- AK0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19990913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAE – 37 | 11 | 11W | 26 | 10W | 9 | Dai-37 |
| 2 | EHI – 26 | 21 | 41E | 4 ⚠ | 08E | 10 | Dai-26 |
| 3 | HS – 3 | 12 | 07E | 8 | 04E | 3 | |
| 4 | EKC – 27 | -26 | 09E | 8 | 04E | 12 | |
| 5 | HS – 1 | 19 | 15(E) | 330 | 12(E) | ~1.5 | |
| 6 | AT – 1 | 19 | 56(E) | 319 | 53(E) | - | |
| 7 | ? – 1 | 10 | 74(E) | 301 | 71(E) | ~01 | |
| 8 | ? – 3 | 12 | 70(E) | 296 | 76(E) | ~04 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.