Monthly Sunspot Observation Report
December 2025 Sunspot classification and coordinates →
107.00
Monthly mean R
14 / 31
Observation days (45%)
196
Maximum R
17
Days without observation
D: Day · T: Time (UT) · g: Number of groups · f: Number of spots · R: Relative number (10g+f) · Q: Seeing 1–5 · O: Observer · G: Assigned observer
| Drawing | D | T (UT) | g | f | R | Q | O | G |
|---|---|---|---|---|---|---|---|---|
| Drawing | 03 | 09:50 | 8 | 89 | 169 | 3 | Korhan YELKENCİ | KY |
| Drawing | 04 | 11:30 | 8 | 80 | 160 | 3 | Süleyman FİŞEK | SF |
| Drawing | 05 | 08:10 | 8 | 61 | 141 | 3 | Ergün EGE | SF |
| Drawing | 06 | 09:45 | 7 | 126 | 196 | 3 | Süleyman FİŞEK | SF |
| Drawing | 10 | 09:25 | 7 | 35 | 105 | 3 | Ergün EGE | EE |
| Drawing | 11 | 07:40 | 6 | 35 | 95 | 3 | S.FİŞEK+E.Y. | SF |
| Drawing | 12 | 08:20 | 5 | 23 | 73 | 3 | Ergün EGE | EE |
| Drawing | 15 | 08:30 | 6 | 18 | 78 | 3 | S.FİŞEK+T.B. | SF |
| Drawing | 16 | 10:40 | 5 | 17 | 67 | 3 | Olcay PLEVNE | OP |
| Drawing | 17 | 06:40 | 5 | 19 | 69 | 3 | K.YELKENCİ+E.Y. | KY |
| Drawing | 18 | 08:45 | 5 | 11 | 61 | 3 | K.YELKENCİ+T.B. | KY |
| Drawing | 19 | 11:00 | 5 | 9 | 59 | 3 | K.YELKENCİ+T.B. | EE |
| Drawing | 29 | 10:15 | 8 | 34 | 114 | 3 | E.EGE+E.Y. | EE |
| Drawing | 30 | 09:00 | 8 | 31 | 111 | 3 | Ergün EGE | OP |
| Monthly Mean of Relative Number: 107.00 [14 observations; 45%] | ||||||||
Observers Observation days this month and mean observing times
| Observer | Days | Mean time (all) | Mean time (own duty days) |
|---|---|---|---|
| Ergün Ege EE | 5 | 09:02 | 09:20 [3] |
| Korhan Yelkenci KY | 4 | 09:04 | 08:25 [3] |
| Süleyman Fişek SF | 4 | 09:21 | 09:21 [4] |
| Olcay Plevne OP | 1 | 10:40 | 10:40 [1] |
| Month total | 14 – 17 | Observing window: 07:00 – 09:00 UT | |
Colour: black = within the window, green = up to 30 min late, purple = later.
The last twelve months Development of the daily and monthly mean relative number
Observation days (2025): 245 / 365 (67%)
Days without observation: 120
Consecutive days: 2 (longest 29)