Daily Sunspot Evaluation
Observation Sheet Monday, 20 August 1990
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)
- 20
- Number of spots (f)
- 200
- Relative number (R)
- 400
- Observer
- HE
- Reading
- all checks consistent
- File
- 19900820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKI – 7 | 12 | 75W | 231 | 78W | 10 | 355 |
| 2 | AX – 1 | 3 | 57W | 213 | 60W | - | 355 |
| 3 | CSI – 5 | 17 | 51W | 207 | 54W | 7 | 362 |
| 4 | EKI – 19 | 6 | 46W | 202 | 49W | 12 | 358 |
| 5 | BRO – 4 | 23 | 25W | 181 | 28W | 5 | 368 |
| 6 | AX – 2 | 11 | 09W | 165 | 12W | - | 382 |
| 7 | HK – 6 | 11 | 05E | 151 | 02E | 4 | 391 |
| 8 | BRI – 8 | 20 | 26E | 130 | 23E | 5.5 | 382 |
| 9 | CAI – 25 | 12 | 27E | 129 | 24E | 7 | 396E |
| 10 | AX – 2 | 11 | 53E | 103 | 50E | 1 | 388 |
| 11 | CAI – 10 | -19 | 53W | 209 | 56W | 5 | 385 |
| 12 | BXI – 4 | -18 | 38W | 194 | 41W | 4 | 367 |
| 13 | CAI – 13 | -36 | 30W | 186 | 33W | 10 | 386 |
| 14 | BRO – 3 | -17 | 15W | 171 | 18W | 4 | 385 |
| 15 | EAC – 44 | -11 | 11W | 167 | 14W | 13 | 392 |
| 16 | HH – 8 | -28 | 01W | 157 | 04W | 4.5 | 373 |
| 17 | FKC – 17 | -14 | 57E | 99 | 54E | 17 | 383 |
| 18 | EAC – 17 | -23 | 60E | 96 | 57E | 15 | 384 |
| 19 | ? – 4 | -28 | 80E | 76 | 77E | - | 389 |
| 20 | ? – 1 | -7 | 83E | 73 | 80E | - | 390 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.