ВНИМАНИЕ! На форуме началось голосование в конкурсе - астрофотография месяца ИЮЛЬ-АВГУСТ!
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если бы не одно "но": глубина погружения Солнца 16 градусов. Попробуйте найти звезду в таких условиях!
Это практически конец астрономических сумерек. Никаких трудностей не создаст, даже для звезды 9,5m на высоте 28 градусов.
Это Москва, здесь могут и облаками накрыть.
Завтра в пятницу, 11 декабря, в 18:05 МСК будет едва ли не самое лучшее астероидное покрытие для Москвы и области в этом году.
Всем большой привет! Как лучше замерять время покрытия и какова необходимая точность? Раньше в статьях встречал что даже время по интернету не подходит... Или уже не так?
Цитата: e+ от 12 Дек 2020 [22:51:54]Всем большой привет! Как лучше замерять время покрытия и какова необходимая точность? Раньше в статьях встречал что даже время по интернету не подходит... Или уже не так?Это зависит от метода регистрации покрытия. Обычно регистрируют визуально, с записью видео и методом дрифтскана. Вы как регистрируете ( или собираетесь регистрировать)?
ASTEROIDAL OCCULTATION - REPORT FORM+---------------------------------------------------------------------------+| EAON || IOTA / ES || || INTERNATIONAL OCCULTATION || EUROPEAN ASTEROIDAL || TIMING ASSOCIATION || OCCULTATION NETWORK || EUROPEAN SECTION |+---------------------------------------++----------------------------------+ 1 DATE: 2020/12/17 STAR: UCAC4-701-040742 ASTEROID: (795) Fini 2 OBSERVER: Michel Turchenko EAON Abbr: E-mail: mturchenko@yandex.ru Address: 357601, Russian Federation, Stavropol region, Yessentuki, Il'inskaya 22 3 OBSERVING STATION: Nearest city: Kislovodsk Station: Longitude (DD MM SS.s): E 42°40'17.31" Latitude (DD MM SS.s): N 43°44'16.2" Altitude (m): 2078 Datum: WGS84 Single station: +---------------------------------------------+4 TIMING OF EVENTS: | | | EVENT REPORTED: POSITIVE | | | +---------------------------------------------+ Event code S: observation Start I: Interruption start D: Disappearance J: Interruption end R: Reappearance B: Blink F: Flash E: observation End O: Other (specify) Abbreviations P.E.: Personal Equation = reaction time (for visual obs) Acc.: Accuracy (overall accuracy of the given time) Comments Event Time (UT) P.E. Acc. Code HH:MM:SS.ss S.ss S.ss S - 16:30:14 - - : D - 16:33:21.792 - +/-0.2 : R - 16:33:27.032 - +/-0.2 : E - 16:35:01 - - : Duration : 5.528 +/-0.4 Mid-event : 16:33:24.556 5 TELESCOPE: Type: Achromatic refractor Aperture: 80 mm Magnification: prime focus 400 mm Mount: Equatorial Motor drive: Yes 6 TIMING & RECORDING: Time source: Reference time signals from GPS-USB Sensor: ZWO ASI385MC Recording: Notebook Lenovo ThinkPad T480 Time insertion (specify): Recording a 1PPS light flash and a GPS-synchronized system time stamp on a video Event insertion (specify): 7 OBSERVING CONDITIONS: Atmospheric transparency: GOOD Wind: Weak Temperature: -6°C Star image stability: Stable Minor planet visible: No 8 ADDITIONAL COMMENTS:Video rate 2.5 fps. The time stamp on the video corresponds to the end of the exposure of the frame. To get the time of the event, the difference between the system time and the time obtained from GPS was added and half of the frame duration was subtracted, that is, the time of the event was tied to the middle of the frame duration. The difference between the system time and the GPS time was determined with an accuracy of 2-4 ms. with 1PPS light flashes recorded on video. Wherein, the time difference was determined from those frames where the onset of the flash occurred at the beginning of the frame exposure. Such measurements were taken before and after occultation. The difference in system time and GPS time in the moment of occultation was calculated from these measurements. The duration of the coverage was measured between the approximate middle of the fall and rise of the signal fronts from the star.
ASTEROIDAL OCCULTATION - REPORT FORM+---------------------------------------------------------------------------------+| EAON || IOTA / ES || || INTERNATIONAL OCCULTATION || EUROPEAN ASTEROIDAL || TIMING ASSOCIATION || OCCULTATION NETWORK || EUROPEAN SECTION |+--------------------------------------++-----------------------------------------+ 1 DATE: 2020/12/18 STAR: TYC 0628-00328-1 ASTEROID: (401) Ottilia 2 OBSERVER: Michel Turchenko EAON Abbr: E-mail: mturchenko@yandex.ru Address: 357601, Russian Federation, Stavropol region, Yessentuki, Il'inskaya 22 3 OBSERVING STATION: Nearest city: Kislovodsk Station: Longitude (DD MM SS.s): E 42°40'15.57" Latitude (DD MM SS.s): N 43°44'16.33" Altitude (m): 2078 Datum: WGS84 Single station: +---------------------------------------------+4 TIMING OF EVENTS: | | | EVENT REPORTED: POSITIVE | | | +---------------------------------------------+ Event code S: observation Start I: Interruption start D: Disappearance J: Interruption end R: Reappearance B: Blink F: Flash E: observation End O: Other (specify) Abbreviations P.E.: Personal Equation = reaction time (for visual obs) Acc.: Accuracy (overall accuracy of the given time) Comments Event Time (UT) P.E. Acc. Code HH:MM:SS.ss S.ss S.ss S - 20:57:33 - - : D - 20:59:07.988 - +/-0.06 : R - 21:00:08.85 - +/-0.06 : E - 21:02:00 - - : Duration : 60.862 +/-0.12 Mid-event : 20:59:38.419 5 TELESCOPE: Type: Achromatic refractor Aperture: 80 mm Magnification: prime focus 400 mm Mount: Equatorial Motor drive: Yes 6 TIMING & RECORDING: Time source: Reference time signals from GPS-USB Sensor: ZWO ASI385MC Recording: Notebook Lenovo ThinkPad T480 Time insertion (specify): Recording a 1PPS light flash and a GPS-synchronized system time stamp on a video Event insertion (specify): 7 OBSERVING CONDITIONS: Atmospheric transparency: GOOD Wind: No Temperature: -5°C Star image stability: Stable Minor planet visible: No 8 ADDITIONAL COMMENTS:Video rate 2.5 fps. The time stamp on the video corresponds to the end of the exposure of the frame. To get the time of the event, the difference between the system time and the time obtained from GPS was added and half of the frame duration was subtracted, that is, the time of the event was tied to the middle of the frame duration. The difference between the system time and the GPS time was determined with an accuracy of 2-4 ms. with 1PPS light flashes recorded on video. Wherein, the time difference was determined from those frames where the onset of the flash occurred at the beginning of the frame exposure. Such measurements were taken before and after occultation. The difference in system time and GPS time in the moment of occultation was calculated from these measurements. The duration of the coverage was measured between the approximate middle of the fall and rise of the signal fronts from the star.
... Приобретите какой нибудь USB-GPS модуль со световой индикацией 1pps сигнала. ...