Monthly Sunspot Observation Report
April 2025 Sunspot classification and coordinates →
119.11
Monthly mean R
18 / 30
Observation days (60%)
194
Maximum R
12
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 | 12:40 | 7 | 83 | 153 | 3 | Süleyman FİŞEK | SF |
| Drawing | 04 | 06:50 | 9 | 50 | 140 | 3 | Ergün EGE | EE |
| Drawing | 06 | 09:50 | 11 | 84 | 194 | 3 | Burçin TANIK | BT |
| Drawing | 09 | 13:00 | 7 | 51 | 121 | 3 | Burçin TANIK | BT |
| Drawing | 10 | 08:30 | 10 | 51 | 151 | 3 | Süleyman FİŞEK | SF |
| Drawing | 11 | 07:10 | 8 | 45 | 125 | 3 | Ergün EGE | EE |
| Drawing | 13 | 06:50 | 6 | 55 | 115 | 3 | Korhan YELKENCİ | KY |
| Drawing | 14 | 08:00 | 5 | 31 | 81 | 3 | Süleyman FİŞEK | KY |
| Drawing | 15 | 10:45 | 4 | 27 | 67 | 3 | Olcay PLEVNE | OP |
| Drawing | 17 | 09:10 | 6 | 26 | 86 | 3 | O.PLEVNE=S.F. | SF |
| Drawing | 18 | 10:10 | 6 | 34 | 94 | 3 | Ergün EGE | EE |
| Drawing | 21 | 08:30 | 8 | 63 | 143 | 3 | Korhan YELKENCİ | KY |
| Drawing | 22 | 11:00 | 6 | 39 | 99 | 3 | Olcay PLEVNE | OP |
| Drawing | 23 | 10:30 | 8 | 51 | 131 | 3 | Burçin TANIK | BT |
| Drawing | 25 | 11:25 | 13 | 51 | 181 | 3 | Ergün EGE | EE |
| Drawing | 28 | 08:10 | 7 | 28 | 98 | 3 | Korhan YELKENCİ | KY |
| Drawing | 29 | 08:40 | 7 | 21 | 91 | 3 | Süleyman FİŞEK | OP |
| Drawing | 30 | 09:00 | 4 | 34 | 74 | 3 | Burçin TANIK | BT |
| Monthly Mean of Relative Number: 119.11 [18 observations; 60%] | ||||||||
Observers Observation days this month and mean observing times
| Observer | Days | Mean time (all) | Mean time (own duty days) |
|---|---|---|---|
| Süleyman Fişek SF | 4 | 09:27 | 10:35 [2] |
| Ergün Ege EE | 4 | 08:54 | 08:54 [4] |
| Burçin Tanık BT | 4 | 10:35 | 10:35 [4] |
| Korhan Yelkenci KY | 3 | 07:50 | 07:50 [3] |
| Olcay Plevne OP | 3 | 10:18 | 10:53 [2] |
| Month total | 18 – 12 | 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): 70 / 120 (58%)
Days without observation: 50
Consecutive days: 3 (longest 8)