Monthly Sunspot Observation Report
September 2025 Sunspot classification and coordinates →
129.57
Monthly mean R
23 / 30
Observation days (77%)
202
Maximum R
7
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 | 02 | 07:35 | 12 | 39 | 159 | 3 | Korhan YELKENCİ | KY |
| Drawing | 03 | 12:08 | 9 | 46 | 136 | 3 | Korhan YELKENCİ | KY |
| Drawing | 04 | 08:50 | 10 | 70 | 170 | 3 | Korhan YELKENCİ | KY |
| Drawing | 05 | 07:10 | 7 | 55 | 125 | 3 | Korhan YELKENCİ | KY |
| Drawing | 07 | 08:40 | 5 | 30 | 80 | 3 | Korhan YELKENCİ | KY |
| Drawing | 08 | 08:50 | 7 | 42 | 112 | 3 | Korhan YELKENCİ | KY |
| Drawing | 09 | 07:40 | 6 | 29 | 89 | 3 | Süleyman FİŞEK | SF |
| Drawing | 10 | 11:00 | 6 | 22 | 82 | 3 | Olcay PLEVNE | OP |
| Drawing | 11 | 06:40 | 5 | 31 | 81 | 3 | Korhan YELKENCİ | SF |
| Drawing | 12 | 07:40 | 4 | 15 | 55 | 3 | Süleyman FİŞEK | SF |
| Drawing | 14 | 09:10 | 5 | 17 | 67 | 3 | Korhan YELKENCİ | SF |
| Drawing | 15 | 11:10 | 5 | 23 | 73 | 3 | Süleyman FİŞEK | SF |
| Drawing | 16 | 07:30 | 9 | 38 | 128 | 3 | Korhan YELKENCİ | SF |
| Drawing | 17 | 08:15 | 8 | 47 | 127 | 3 | Süleyman FİŞEK | KY |
| Drawing | 18 | 12:45 | 8 | 52 | 132 | 3 | Süleyman FİŞEK | SF |
| Drawing | 19 | 07:30 | 8 | 54 | 134 | 3 | Ergün EGE | EE |
| Drawing | 20 | 07:30 | 11 | 68 | 178 | 3 | Süleyman FİŞEK | SF |
| Drawing | 21 | 09:55 | 13 | 72 | 202 | 3 | Süleyman FİŞEK | SF |
| Drawing | 22 | 11:15 | 14 | 62 | 202 | 3 | Süleyman FİŞEK | SF |
| Drawing | 23 | 07:05 | 13 | 60 | 190 | 3 | Süleyman FİŞEK | SF |
| Drawing | 24 | 07:15 | 8 | 48 | 128 | 3 | Korhan YELKENCİ | KY |
| Drawing | 25 | 06:00 | 12 | 40 | 160 | 2 | Süleyman FİŞEK | SF |
| Drawing | 30 | 07:35 | 8 | 90 | 170 | 3 | Korhan YELKENCİ | KY |
| Monthly Mean of Relative Number: 129.57 [23 observations; 77%] | ||||||||
Observers Observation days this month and mean observing times
| Observer | Days | Mean time (all) | Mean time (own duty days) |
|---|---|---|---|
| Korhan Yelkenci KY | 11 | 08:18 | 08:30 [8] |
| Süleyman Fişek SF | 10 | 08:56 | 09:00 [9] |
| Olcay Plevne OP | 1 | 11:00 | 11:00 [1] |
| Ergün Ege EE | 1 | 07:30 | 07:30 [1] |
| Month total | 23 – 7 | Observing window: 06:00 – 08:00 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): 192 / 273 (70%)
Days without observation: 81
Consecutive days: 1 (longest 29)