Monthly Sunspot Observation Report
September 2021 Sunspot classification and coordinates →
49.81
Monthly mean R
26 / 30
Observation days (87%)
98
Maximum R
4
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 | 01 | 08:43 | 3 | 19 | 49 | 3 | Talar YONTAN | ÖÖ |
| Drawing | 02 | 08:45 | 2 | 16 | 36 | 3 | Oğuzhan ÇAKIR | OÇ |
| Drawing | 03 | 11:50 | 2 | 7 | 27 | 3 | Ergün EGE | EE |
| Drawing | 04 | 08:40 | 5 | 23 | 73 | 3 | Başar COŞKUNOĞLU | OP |
| Drawing | 05 | 09:45 | 5 | 37 | 87 | 3 | Talar YONTAN | TY0 |
| Drawing | 06 | 07:40 | 4 | 30 | 70 | 3 | Ergün EGE | EE |
| Drawing | 07 | 07:00 | 4 | 47 | 87 | 3 | Korhan YELKENCİ | KY |
| Drawing | 08 | 10:17 | 5 | 48 | 98 | 3 | Başar COŞKUNOĞLU | OP |
| Drawing | 11 | 08:25 | 4 | 48 | 88 | 3 | Hikmet ÇAKMAK | HÇ |
| Drawing | 12 | 07:15 | 3 | 31 | 61 | 3 | Oğuzhan ÇAKIR | OÇ |
| Drawing | 13 | 08:35 | 3 | 17 | 47 | 3 | Hikmet ÇAKMAK | HÇ |
| Drawing | 14 | 08:25 | 2 | 5 | 25 | 3 | Korhan YELKENCİ | OÇ |
| Drawing | 15 | 07:50 | 1 | 1 | 11 | 3 | Olcay PLEVNE | OP |
| Drawing | 16 | 09:05 | 0 | 0 | 0 | 3 | Özgecan ÖNALTAŞ | TY0 |
| Drawing | 17 | 07:15 | 0 | 0 | 0 | 3 | O.PLEVNE=B.C. | BC |
| Drawing | 18 | 08:20 | 0 | 0 | 0 | 3 | Ergün EGE | EE |
| Drawing | 19 | 09:40 | 1 | 5 | 15 | 3 | Özgecan ÖNALTAŞ | ÖÖ |
| Drawing | 20 | 11:45 | 3 | 23 | 53 | 3 | Oğuzhan ÇAKIR | EE |
| Drawing | 21 | 07:00 | 5 | 16 | 66 | 3 | K.YELKENCİ=T.Y. | OÇ |
| Drawing | 24 | 07:30 | 3 | 33 | 63 | 3 | O.PLEVNE=B.C. | BC |
| Drawing | 25 | 07:05 | 3 | 26 | 56 | 2 | Korhan YELKENCİ | KY |
| Drawing | 26 | 08:35 | 3 | 12 | 42 | 3 | O.PLEVNE=B.C. | BC |
| Drawing | 27 | 08:00 | 4 | 15 | 55 | 3 | Hikmet ÇAKMAK | HÇ |
| Drawing | 28 | 08:00 | 6 | 24 | 84 | 3 | Korhan YELKENCİ | KY |
| Drawing | 29 | 08:15 | 3 | 25 | 55 | 3 | Olcay PLEVNE | OP |
| Drawing | 30 | 10:30 | 2 | 27 | 47 | 3 | Talar YONTAN | TY0 |
| Monthly Mean of Relative Number: 49.81 [26 observations; 87%] | ||||||||
Observers Observation days this month and mean observing times
| Observer | Days | Mean time (all) | Mean time (own duty days) |
|---|---|---|---|
| Olcay Plevne OP | 5 | 07:53 | 08:02 [2] |
| Korhan Yelkenci KY | 5 | 07:30 | 07:22 [3] |
| Talar Yontan TY0 | 3 | 09:39 | 10:08 [2] |
| Oğuzhan Çakır OÇ | 3 | 09:15 | 08:00 [2] |
| Ergün Ege EE | 3 | 09:17 | 09:17 [3] |
| Hikmet Çakmak HÇ | 3 | 08:20 | 08:20 [3] |
| Başar Coşkunoğlu BC | 2 | 09:29 | --:-- |
| Ozgecan Önal Taş ÖÖ | 2 | 09:23 | 09:40 [1] |
| Month total | 26 – 4 | 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 (2021): 184 / 273 (67%)
Days without observation: 89
Consecutive days: 7 (longest 64)