Daily Sunspot Evaluation
Observation Sheet Saturday, 12 October 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)
- 69
- Relative number (R)
- 179
- Observer
- SG0
- Reading
- all checks consistent
- File
- 19911012.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HA – 4 | 18 | 70°W | 109 | 73°W | 2.5° | 555 |
| 2 | DAI – 10 | 7 | 28°E | 11 | 25°E | 6.5 | 565 |
| 3 | AR – 1 | 1 | 37°E | 2 | 34°E | 0.5 | 566 |
| 4 | HA – 1 | 6 | 44°E | 355 | 41°E | 1.5 | 569 |
| 5 | AX – 1 | -17 | 38°W | 77 | 41°W | - | 567 |
| 6 | HA – 6 | -9 | 36°W | 75 | 39°W | 2° | 560 |
| 7 | AX – 2 | -18 | 39°W | 58 | 22°W | 1° | 572 |
| 8 | AX – 1 | -28 | 07°E | 32 | 04°E | - | 573 |
| 9 | DAC – 9 | -12 | 20°E | 19 | 17°E | 3° | 561 |
| 10 | DKC – 23 | -25 | 36°E | 9 | 27°E | 7° | 562 |
| 11 | ? – 11 | -21 | 66°E | 333 | 63°E | 10° | 571 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.