Daily Sunspot Evaluation
Observation Sheet Saturday, 14 September 1991
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)
- 116
- Relative number (R)
- 226
- Observer
- MB
- Reading
- all checks consistent
- File
- 19910914.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 3 | 21 | 67W | 115 | 69W | 3 | 508 |
| 2 | CAI – 13 | 3 | 54W | 102 | 56W | 10 | 498 |
| 3 | BRO – 15 | 14 | 05W | 53 | 07W | 5.5 | 504 |
| 4 | AX – 4 | 5 | 03W | 51 | 05W | 1 | 509 |
| 5 | HS – 1 | 2 | 50E | 358 | 48E | 2 | 502 |
| 6 | CAI – 12 | 7 | 68E | 340 | 66E | 7 | 505 |
| 7 | DAO – 12 | -11 | 67W | 115 | 69W | 9 | 493 |
| 8 | HS – 1 | -24 | 52W | 100 | 54W | 2 | 492 |
| 9 | CAI – 23 | -20 | 02E | 46 | 00 | 7 | 493 |
| 10 | BRI – 29 | -21 | 19E | 29 | 17E | 10.5 | 500 |
| 11 | HA – 3 | -11 | 36E | 12 | 34E | 3.5 | 501 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.