Daily Sunspot Evaluation
Observation Sheet Thursday, 28 September 1978
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)
- 13
- Number of spots (f)
- 52
- Relative number (R)
- 182
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19780928.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 36 | 31E | 221 | 28E | ||
| 2 | C – 9 | 40 | 46E | 206 | 43E | ||
| 3 | H – 3 | 19 | 35E | 217 | 32E | ||
| 4 | H – 6 | -20 | 53E | 199 | 50E | ||
| 5 | B – 5 | -16 | 26E | 226 | 23E | ||
| 6 | A – 4 | -17 | 21E | 231 | 18E | ||
| 7 | A – 2 | -12 | 10E | 242 | 09E | ||
| 8 | B – 6 | -13 | 02W | 254 | 05W | ||
| 9 | C – 4 | -20 | 54W | 306 | 57W | ||
| 10 | J – 2 | -13 | 69W | 312 ⚠ | 63W | ||
| 11 | C – 4 | 19 | 43W | 295 | 46W | ||
| 12 | A – 2 | 23 | 54W | 306 | 52W | ||
| 13 | H – 4 | 28 | 30W | 282 | 33W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.