Daily Sunspot Evaluation
Observation Sheet Sunday, 16 April 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)
- 10
- Number of spots (f)
- 92
- Relative number (R)
- 192
- Observer
- GT
- Reading
- all checks consistent
- File
- 19780416.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 12 | 32 | 59E | 214 | 56E | ||
| 2 | A – 1 | 17 | 63E | 210 | 60E | ||
| 3 | ? – 1 | -28 | 83E | 190 | 80E | ||
| 4 | A – 3 | -31 | 73E | 200 | 70E | ||
| 5 | J – 2 | -44 | 27E | 246 | 24E | ||
| 6 | J – 9 | -21 | 16W | 289 | 19W | ||
| 7 | C – 13 | 19 | 33W | 306 | 36W | ||
| 8 | D – 37 | 13 | 21W | 294 | 24W | ||
| 9 | A – 1 | 17 | 16W | 289 | 19W | ||
| 10 | D – 13 | 17 | 05W | 278 | 08W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.