Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 July 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)
- 8
- Number of spots (f)
- 77
- Relative number (R)
- 157
- Observer
- TÖ0
- Reading
- all checks consistent
- File
- 19910716.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AX – 4 | 21 | 52W | 174 | 56W | 3 | 382 |
| 2 | HS – 1 | 22 | 70E | 52 | 66E | 1.5 | 381 |
| 3 | EKI – 18 | -24 | 42W | 164 | 46W | 14.5 | 398 |
| 4 | AX – 1 | -32 | 28W | 150 | 32W | 383 | |
| 5 | HA – 3 | -11 | 18W | 140 | 22W | 2 | 365 |
| 6 | DAI – 25 | -16 | 14W | 136 | 18W | 9 | 371 |
| 7 | HK – 17 | -27 | 36E | 86 | 32E | 4 | 318 |
| 8 | HA – 8 | -23 | 58E | 64 | 54E | 4 | 380 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.