TYC 1839-00696-1(mag10.6) by (212)Medea on 2011 Jan. 08 **** Successful observations: Observer: Reijin Aikawa (JOIN:12453) Place: Sakado, Saitama, Japan Long.: 139o 26' 50.4" E, Lat.: 35o 56' 56.5" N, Height: 21m (JGD2000=WGS84) Method: Visual, 20.3cm F10 Schmidt Cass, x100, Stop watch Time signal: TEL Result: D 11h 47m 45.2s (P.E. 0.65s corrected.) R 11h 48m 03.6s (P.E. 0.65s corrected.) Note: Both of disappearance and reappearance occurred gradually. Observer: Shigeo Uchiyama (JOIN:12454) Place: Kashiwa, Chiba, Japan Long.: 139o 58' 50.7"E, Lat.: 35o 52' 08.5"N Height: 20m (JGD2000=WGS84) Method: VCR, 25.3cm F10 Schmidt Cass, WAT-100N, 40mm eyepiece + 8mm(F0.8)camera lens. Time signal: GHS, TIVi Result: D 11h 47m 39.83s +/-0.03s R 11h 47m 58.61s +/-0.03s Observer: Hisashi Suzuki (JOIN:12455,12509) Place: Hamamatsu, Shizuoka, Japan Long.: 137o 42' 48.4" E, Lat.: 34o 45' 53.8" N, Height: 51m (JGD2000=WGS84) Method: VCR, 25cm F5 BRC, WAT-100N, Limovie Time signal: GHS, TIVi Result: D 11h 48m 13.44s +/-0.03s R 11h 48m 31.22s +/-0.03s Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Masayuki Uchiyama (JOIN:12456,12481,12509) Place: Owase, Mie, Japan Long.: 136o 11' 39" E, Lat.: 34o 04' 37" N, Height: 15m (JGD2000=WGS84) Method: VCR,25cm F6.4 Schmidt Cass, WAT-100N ,DV Time signal: GHS, TIVi Result: D 11h 48m 35.48s +/-0.03s R 11h 48m 52.74s +/-0.03s Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Hayato Watanabe, Nozomi Watanabe (JOIN:12457,12497,12509) Place: Inabe, Mie, Japan Long.: 136o 33' 33.9" E, Lat.: 35o 07' 10.2" N, Height: 92m (JGD2000=WGS84) Method: VCR, 13cm F7.7 Refractor, WAT-120N(Slow shutter 8Fr) Time signal: GHS, TIVi Result: D 11h 48m 24.39s +/-0.14s R 11h 48m 38.99s +/-0.14s (WAT-120N delay corrected) Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Akie Hashimoto (JOIN:12458) Place: Chichibu, Saitama, Japan Long.: 139o 01' 59.6" E, Lat.: 35o 58' 04.5" N, Height: 355m (JGD2000=WGS84) Method: Visual, 21cm Cass, x210 Time signal: GHS, Stop watch Result: D 11h 47m 50.94s (P.E. 0.3s corrected.) R 11h 48m 07.82s (P.E. 0.2s corrected.) Observer: Osamu Ninomiya (JOIN:12459) Place: Kariya, Aichi, Japan Long.: 137o 00' 13" E, Lat.: 34o 59' 57" N, Height: 13m (JGD2000=WGS84) Method: Visual, 50cm Newtonian, Voice recorder Time signal: TEL Result: D 11h 48m 19.4s (P.E. 0.4s corrected.) R 11h 48m 37.3s (P.E. 0.4s corrected.) Note: Reappearance occurred slowly. Observer: Katsuhiko Kitazaki (JOIN:12460,12532) Place: Musashino, Tokyo, Japan Long.: 139o 33' 41.2" E, Lat.: 35o 42' 36.9" N, Height: 66m (JGD2000=WGS84) Method: VCR, 40cm F10.1 Cass, x0.28Reducer, WAT-100N Time signal: GHS, TIVi Result: D 11h 47m 45.49s +/-0.03s R 11h 48m 04.31s +/-0.03s Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Akira Asai (JOIN:12463,12487,12509) Place: Inabe, Mie, Japan Long.: 136o 31' 24.7" E, Lat.: 35o 10' 14.7" N, Height: 187m (JGD2000=WGS84) Method: VCR, 35.5cm F11 Schmidt Cass, F6.3 Reducer, 25mm eyepiece + 6mm CCTV lens, TGv-M (slow shutter 8Fr) Time signal: GHS, TIVi Result: D 11h 48m 25.44s +/-0.14s R 11h 48m 38.45s +/-0.14s (WAT-120N delay 0.275s corrected) Note: Reappearance occurred slowly. Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Sadaharu Uehara (JOIN:12466) Place: Tsukuba, Ibaraki, Japan Long.: 140o 07' 04.2" E, Lat.: 36o 05' 11.2" N, Height: 30m (JGD2000=WGS84) Method: Visual, 20cm Reflector, x107, audio recorder Time signal: TEL Result: D 11h 47m 35.8s +/-0.4s (P.E. corrected.) R 11h 47m 56.1s +/-0.1s (P.E. corrected.) Note: Reported by Tsutomu Hayamizu. Observer: Yasukazu Ikari (JOIN:12465,12509) Place: Moriyama, Shiga, Japan Long.: 135o 59' 23.8" E, Lat.: 35o 02' 59.1" N, Height: 105m (JGD2000=WGS84) Method: VCR, 25.4cm F4.3 Schmidt Cass, WAT-120N+ (slow shutter 1Fr), Limovie Time signal: GPS, VCR time inmpose Result: D 11h 48m 33.68s +/-0.03s R 11h 48m 43.76s +/-0.03s Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Hideo Takashima, Fujio Ohba (JOIN:12469,12509) Place: Kashiwa, Chiba, Japan Long.: 139o 58' 07" E, Lat.: 35o 49' 53" N, Height: 28m (JGD2000=WGS84) Method: VCR, 21cm F11.5 Schmidt, WAT-120N+ (Slow shutter 2Fr) Time signal: GHS,TIVi Result: D 11h 47m 40.31s +/-0.03s R 11h 47m 58.91s +/-0.03s Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Yuji Nakamura ,Yoshifumi Hirao, Akira@Kawakita (JOIN:12470) Place: Kameyama, Mie, Japan Long.: 136o 25' 26.7" E, Lat.: 34o 51' 13.4" N, Height: 72m (JGD2000=WGS84) Method: VCR, 10cm F4 Refractor, WAT-120N(Slow shutter 2Fr) Time signal: GHS Result: D 11h 48m 26.53s R 11h 48m 43.94s Note: Reported by Toshio Hirose. Observer: Yukihiro Sugiyama (JOIN:12475,12492) Place: Hiratsuka, Kanagawa, Japan Long.: 139o 18' 51" E, Lat.: 35o 22' 11" N, Height: 11m (JGD2000=WGS84) Method: Visual, 25cm Newtonian, x50, Voice recorder Time signal: TEL Result: D 11h 47m 52.7s +/-0.3s R 11h 48m 09.5s +/-0.3s Note: Disappearance occurred momentary. Reappearance occurred slowly about 0.2 or 0.3sec. Observer: Hiroyuki Tomioka (JOIN:12482) Place: Hitachi, Ibaraki, Japan Long.: 140o 41' 08.9" E, Lat.: 36o 38' 33.2" N, Height: 33m (JGD2000=WGS84) Method: VCR, 30cm Reflector, Watec EIA W100 Time signal: GHS, TIVi Result: D 11h 47m 27.60s R 11h 47m 44.45s Note: Reported by Tsutomu Hayamizu. Observer: Miyoshi Ida (JOIN:12479,12490,12509) Place: Mihama, Mie, Japan Long.: 136o 02' 32.2" E, Lat.: 33o 48' 01.5" N, Height: 12m (JGD2000=WGS84) Method: VCR, 20cm F10 Schmidt Cass, WAT-120N (Slow shutter 8Fr) Time signal: GPS, Time Imposer Result: D 11h 48m 41.49s +/-0.14s R 11h 48m 55.20s +/-0.14s (WAT-120N delay corrected.) Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Minoru Owada (JOIN:12485) Place: Morimachi, Shizuoka, Japan Long.: 137o 55' 50.0" E, Lat.: 34o 55' 37.7" N, Height: 340m (JGD2000=WGS84) Method: VCR, 7.5cm F6.7 Refractor, WAT-120N(Slow shutter 16Fr), Limovie Time signal: GPS, TIVi Result: D 11h 48m 09.29s +/-0.27s R 11h 48m 27.44s +/-0.27s Observer: Taksun Poon, Gloria Cheung, WC Yue (JOIN:12495) Place: Hokoon Science Centre, Kowloon, Hong Kong, China Long.: 114o 06' 28.4" E, Lat.: 22o 23' 01.7" N, Height: 160m (WGS84, MSL) Method: Video with frame analysis; RC-type reflector 50.0cm F8.0 Time signal: GPS-time inserted Result: D 11h 54m 05.645s +/-0.017s R 11h 54m 20.308s +/-0.017s Note: Observation was made from 11h 05m to 12h 10m. Star and asteroid merged at 11h 39m, separated at 12h 05m. Conditions: fog, lights; stability: slight flickering. Star was bright and 30 fps was used. Note: Reported by Mitsuru Soma. Observer: Toshihiko Ito (JOIN:12496) Place: Suzuka, Mie, Japan Long.: 136o 34' 35" E, Lat.: 34o 51' 04" N, Height: 16m (JGD2000=WGS84) Method: VCR, 25cm F10 Cass, F7.3 Reducer, WAT-100N, Limovie Time signal: GHS, TIVi, TEL Result: D 11h 48m 24.81s R 11h 48m 42.33s Observer: Masayuki Ishida (JOIN:12505) Place: Taiki, Mie, Japan Long.: 136o 19' 53.9" E, Lat.: 34o 16' 27.1" N, Height: 222m (JGD2000=WGS84) Method: VCR, 20cm F10 Schmidt Cass, F6.3 Reducer, WAT-100N Time signal: GHS, TIVi Result: D 11h 48m 31.50s +/-0.03s R 11h 48m 49.86s +/-0.03s Note: VCR was analyzed by Kazuhisa Miyashita. Observer: Patrick LAU (JOIN:12518) Place: Hong Kong Space Museum, Kowloon, Hong Kong, China Long.: 114o 10' 17.30" E, Lat.: 22o 17' 38.75" N, Height: 16m (WGS84, MSL) Method: Video with frame analysis; SCT including Cass and Mak 28.0cm F6.3 Time signal: GPS-time inserted with KIWI OSD Result: D 11h 54m 06.661s +/-0.04s R 11h 54m 19.241s +/-0.04s Note: Observation was made from 11h 44m to 12h 02m. Conditions: fog, lights; stability: slight flickering. Asteroid not visible. Two stars surrounding the target star were visible. Video recording at 25 fps. Video camera was Mallincam Hyper Plus in 4-field accumulative mode, worsening the timing. Note: Reported by Mitsuru Soma. Observer: Wayne CHAU (JOIN:12520) --- still investigating Place: Yuen Long, New Territories, Hong Kong, China Long.: 114o 00' 29.32" E, Lat.: 22o 26' 23.53" N, Height: 10m (WGS84, MSL) Method: Visual; Tape recorder; SCT including Cass and Mak 20.0cm F10.0 Time signal: radio station from Hong Kong Observatory Result: D 11h 54m 00.16s +/-0.3s R 11h 54m 19.84s +/-0.3s Note: No PE applied. Observation was made from 11h 50m to 12h 02m. Conditions: fog, lights; stability: slight flickering. Asteroid not visible. Note: Reported by Mitsuru Soma. ** Negative observations: Observer: Hideki Yoshihara (JOIN:12462) Place: Soja, Okayama, Japan Long.: 133o 38' 34.5" E, Lat.: 34o 39' 46.6" N, Height: 55m (JGD2000=WGS84) Method: VCR,20cm F8 Reflector, WAT-120N Time signal: TEL, TIVi Observer: Akira Matsui (JOIN:12464) Place: Ueda, Nagano, Japan Long.: 138o 13' 07.1" E, Lat.: 36o 21' 04.0" N, Height: 495m (JGD2000=WGS84) Method: Visual, 21.2cm F12 Cass, x65.8, Voice recorder Time signal: TEL