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Five clearly observed misses were recorded for this event.
View the updated prediction.
Observers: 1(M) W Hanna,Alice Springs, Australia 2(M) D Gault,Kuriwa Observatory, NSW, AU 3(M) J Newman,Flynn, ACT, AU 4(M) B Loader,Darfield,NZ 5(M) A Pennell,Dunedin NZ 6(P) Prediction, TT14 28 June
Discussion:
The circle above is plotted at the expected 105 km diameter of Josephina. With no positive chords we cannot say where the actual path was, so the circle has been plotted on the predicted path.
Some observers had trouble identifying the star as it was expected to be about Mag 14.
However it was in fact much dimmer when using WATEC 120N+ cameras and may have looked more like Mag 16.3.
The details can be found on OW Event Details ... Magnitudes Tab shown in the image below.
The partial OW screen image below shows the Star Mag and MP Mag columns and the Camera specific mag beneath.
This effect of (presumably very blue stars) may have been the cause
of other Missing Star notes in the past.
Observational Data:
Observation details for MP ( 303 ) Josephina By Star UCAC4 289-110099 On 2014-07-05 at 10:36:10.0 _______________________________ Observer William Hanna Location Alice Springs, Australia Longitude +133:53 Latitude -23:42 Altitude 584 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 20 cm Seeing Steady Clear Camera Type Grasshopper Express with ADVS ADVS Camera Delay 0 Timing GPS - time inserted Video with frame analysis Missed Comments: Gamma 1.0, gain 29dB Light breeze, 15C The target star was considerably dimmer than expected per the catalogue. _______________________________ Observer Dave Gault Location Kuriwa Observatory, NSW, AU Longitude +150:38 Latitude -33:39 Altitude 286 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 30 cm Seeing Steady Clear Camera Type Grasshopper Express with ADVS ADVS Camera Delay 0 Timing GPS - time inserted Video with frame analysis Missed Comments: Maybe star fainter than 13.9 - see attached GoogleSky image
I say maybe because the Google-Sky image shows the target star much-much fainter than mag. 13.9, which is the approx. magnitude of the 3 stars in the triangle below the stick-pin. I could detect the asteroid, and intended to grab an image of the pair well separated but hit a technical issue. _______________________________ Observer B. Loader Location Darfield,NZ Longitude +172:06 Latitude -43:28 Altitude 210 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 25 cm Seeing Slight flickering Clear Camera Type WAT120N+ AAV-PAL Camera Delay -0.35 Timing GPS - time inserted Video with frame analysis Missed Comments: First 3 minutes of intended observing run lost in cloud. The magnitude of the target image clearly matched a 13.86 star close by and was not 13.1. The target star was not visible. Occult comparison with other catalogs shows no UCAC4 magnitude, others were at about 17.8, so not visible. Report prepopulated by IOTA Reporting Add-in for OW ver.1.8 _______________________________ Observer John Newman Location Flynn, ACT, AU Longitude +149:02 Latitude -35:11 Altitude 657 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 36 cm Seeing Slight flickering Thin cloud < 2 Camera Type WAT120N+ NTSC/EIA Camera Delay -0.559 Timing GPS - time inserted Video with frame analysis Missed Comments: Report prepopulated by IOTA Reporting Add-in for OW ver.1.8 _______________________________ Observer Ash Pennell Location Dunedin NZ Longitude +170:29 Latitude -45:52 Altitude 136 m Datum WGS84 Telescope SCT including Cass and Mak Aperture 35 cm Seeing Slight flickering Broken cloud Camera Type WAT120N PAL/CCIR Camera Delay -0.19 Timing GPS - time inserted Video with frame analysis Missed Comments: