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Loughborough camera picked up the longest “flare” I’ve detected. The video triggered twice; first for a few seconds then for a much longer period. I don’t know if this was due to cloud, or the way the thing flared. There just seemed to be an abrupt halt then restart.
I couldn’t see any hint of regular pulses along the trail, which makes me think it wasn’t a plane. The smoothness of the silvery toned trail and spear-like nature made me think more like a flare. I’ve not done any analysis on it yet. If someone detected it further away from my location, then it isn’t a plane near me.Alex drew this post to my attention, so I’ve posted the image here.
I’ve seen Starlink trains but always as dots following each other in a line. I’m wondering if the dots that would have been visible by eye, have all merged to produce a composite trail. Direction of movement, left to right. Camera points SW.
Hi Robin
Just looked again at the widest angle image. At the bottom, there are a few lamps which show the dispersion is roughly horizontal (on that image anyway).
Derek
Hi Robin
This image was taken on 12th July where I went out. But I will have some others around that date. I will check. But I think I only tried the diffraction grating on 12th until it misted up then reverted to without grating.
I can’t be sure of the orientation of the lines now, and at the time, I was puzzled by the lack of obvious spectra from some of the brightest stars (unless they were out of field).
Robin. A pretty neat article. Around the time when the comet was visible night and morning, I took a mixture of images on a Star Adventurer with a 300 mm lens. On some of the wide angle images with the standard 18-55 mm lens, I used a diffraction grating. I didn’t do anything with the images at the time, but meant to go back one day. The magnification with a wide angle is quite small though. Although the tail came out very bright and sky had a glow to it, I’m not sure if there was any faint diffraction pattern. I should go back and check in negative format. That was the night my car battery failed when I was out in the countryside and I didn’t know my location 🙁
Thanks Nick, appreciated. Here’s a composite image of the meteor viewed from my Loughborough SW-facing Watec camera. The star at image centre is Betelguese. The meteor appears in Orion. The video should contain more images which can also be used for spectral generation at selected points along the trail. I ran a LASER calibration last night for wavelength calibration of the dispersion given by the diffraction grating (~500 lines/mm).
Thanks for the map. (I’m not familiar with Guide 9).
In the images I uploaded, the comet is near the star HIP 3887 (the star shown by red cross), but my copy of Stellarium, with comet data updated at the time of posting ((choosing “Import orbital elements in MPC format“) ~04:00 UT, 19/04/2020), for time and date 04:55 UT 16/04/2020, also seems to be a bit out. The comet on the map is still shown further away than what I imaged it at. Map ref: Stellarium.
Hi John
That is an interesting observation – paying good attention to the detail in your observation, when you were unaware the prediction was out by a certain amount. I made some quick un-tracked images of the comet the morning earlier 16/4/20 between 04:28 – 05:02 UT. I was just curious as to whether I could find it. I’d been spending time previously on comets Y4 and T2, but noticed this comet Y1 listed on Heavens Above, so I thought I’d see if I could find it. I was fighting against the bluing sky and should have went out earlier to try. But it didn’t take long to find it by trial and error imaging the area. I spotted a green ball against the dark bluish sky, so I thought that has to be it. So ran off a few shots. I’ll stack and post later. I will assume that it will appear in the wrong position.
Derek
Thank you Bill, it’s a nice one
I’m not that far on orbits yet, just UA Analyser. I’m still hoping someone will have caught it. I’ll post a digitised spectrum once I choose one of the decent green LASER calibration files.
cheers
Derek
I have AIP4WIN and the great book. I’ve not used it on W10 (a laptop auto upgraded from prev Win versions; and a desk top with W10 Pro). I’ll give it a go and see how it installs.
That sounds about the right year. I’d be 31. I doubt you’re on the unpublished photos – they are just a few close up of a few people I knew, though there may be one where you could be in the background. I’ll check.
