ϑ҈ꗗ (List of Observers) - 2013-14 Apparition
| Observer | Location | Telescope | Days | | Disks | Maps | Animations | Others | Measurements |
| Akutsu, Tomio | Philippines | 35cm SC | 35 | | 277 | | | 1 | | | 1059 |
| Asada, Hideto | Kyoto, Japan | 31cm Refl. | 5 | | 28 | | | | | | | 12 |
| Adachi, Makoto | Shiga, Japan | 31cm Refl. | 17 | * | 25 | | | | | | | | |
| Ikemura, Toshihiko | Aichi, Japan | 38cm Refl. | 13 | | 18 | | | | | | | 118 |
| Ishibashi, Tsutomu | Kanagawa, Japan | 31cm Refl. | 41 | | 82 | | | | | | | 40 |
| Iwamasa, Ryuichi | Kanagawa, Japan | 35cm SC | 53 | | 78 | 4 | | | | | 970 |
| Einaga, Hideo | Hyogo, Japan | 30cm Refl. | 97 | | 384 | 100 | | | | | 3307 |
| Ota, Satoshi | Okinawa, Japan | 30cm Refl. | 23 | | 42 | | | | | | | 342 |
| Oyamada, Hiroyuki | Tokyo, Japan | 20cm Refl. | 7 | | 7 | | | | | | | 7 |
| Kanno, Seiichi | Yamagata, Japan | 30cm Refl. | 19 | | 98 | | | | | | | 174 |
| Kumamori, Teruaki | Osaka, Japan | 28cm SC | 43 | | 43 | | | | | | | 921 |
| Kozawa, Tokujiro | Tokyo, Japan | 33cm Refl. | 43 | | 108 | 2 | | | | | 525 |
| Suzuki, Takashi | Tokyo, Japan | 18cm MC | 2 | | 2 | | | | | | | 30 |
| Takimoto, Ikuo | Kagawa, Japan | 31cm Refl. | 1 | | 1 | | | | | | | | |
| Nakai, Kenji | Hiroshima, Japan | 25cm SC | 1 | | 1 | | | | | | | | |
| Hatanaka, Akitoshi | Mie, Japan | 40cm Refl. | 32 | | 88 | | | | | | | 230 |
| Horikawa, Kuniaki | Kanagawa, Japan | 30cm Refl. | 83 | * | 130 | | | | | | | 435 |
| Mishina, Toshiro | Kanagawa, Japan | 20cm Refl. | 28 | | 67 | | | | | | | 7 |
| Miyazaki, Isao | Okinawa, Japan | 40cm Refl. | 73 | | 111 | | | | | | | 2077 |
| Meiji Univ. | Kanagawa, Japan | 20cm Refl. | 4 | | 8 | | | | | | | | |
| Yamazaki, Akihiro | Tokyo, Japan | 31cm Refl. | 10 | | 17 | | | | | | | 116 |
| Yunoki, Kenkichi | Osaka, Japan | 26cm Refl. | 27 | | 71 | | | | | | | 566 |
| Yoshida, Tomoyuki | Tochigi, Japan | 30cm Refl. | 25 | | 36 | | | | | | | 403 |
| Yoneyama, Seiichi | Kanagawa, Japan | 25cm Refl. | 47 | | 141 | | | | | | | 166 |
| Abel, Paul | UK | 20cm/30cm/50cm Refl. | 19 | * | 21 | 1 | | | | | | |
| Delcroix, Marc | France | 32cm Refl. | 11 | | 51 | | | | | | | 174 |
| Go, Christopher | Philippines | 35cm SC | 83 | | 380 | | | 1 | | | 2767 |
| Kowollik, Silvia | Germany | 20cm/15cm Refl. | 4 | | 10 | 1 | | | | | 127 |
| Pellier, Christophe | France | 25cm Refl. | 18 | | 73 | | | | | | | 738 |
| Phillips, Jim | USA | 25cm Refl./20cm Refr. | 8 | | 10 | | | | | | | 215 |
| Walker, Sean | USA | 30cm Refl. | 2 | | 7 | | | | | | | 59 |
| Wesley, Anthony | Australia | 33cm Refl. | 14 | | 18 | | | | | | | 60 |
| Total | | | | | 2433 | 108 | 2 | | | 15645 |
|
| * | visual observation |