Daily Sunspot Evaluation
Observation Sheet Friday, 16 August 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)
- 16
- Number of spots (f)
- 152
- Relative number (R)
- 312
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910816.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 2 | 23 | 26E | 46 | 23E | 5 | 436 |
| 2 | AX – 2 | 7 | 33E | 39 | 30E | 0.5 | 442 |
| 3 | CKO – 3 | 10 | 78E | 354 | 75E | 7 | 444 |
| 4 | ? – 2 | 2 | 79E | 353 | 76E | 1.5 | 449 |
| 5 | CAO – 6 | -11 | 63W | 135 | 66W | 8 | 423 |
| 6 | HH – 5 | -24 | 42W | 114 | 45W | 3.5 | 431 |
| 7 | HA – 1 | -9 | 23E | 49 | 20E | 2.5 | 432 |
| 8 | EAI – 36 | -20 | 29E | 43 | 26E | 10.5 | 445 |
| 9 | DAI – 46 | -17 | 44E | 28 | 41E | 9 | 440 |
| 10 | DKO – 9 | -11 | 46E | 26 | 43E | 7.5 | 441 |
| 11 | AX – 2 | -7 | 49E | 23 | 46E | 1 | 446 |
| 12 | EKC – 26 | -10 | 61E | 11 | 58E | 12 | 447E |
| 13 | HA – 3 | -5 | 68E | 4 | 65E | 3 | 448 |
| 14 | AX – 3 | -14 | 70E | 2 | 67E | 1.5 | 450 |
| 15 | HK – 2 | -23 | 71E | 1 | 68E | 3 | 451 |
| 16 | CAO – 4 | -18 | 74E | 358 | 71E | 10.5 | 452 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.