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Alan Fitzsimmons
Spectrum of A/2017 U1 obtained on Wednesday night with the 4.2m WHT. Colour is red like Kuiper Belt Objects, featureless.
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Aidan K. 27 Oct 17
Glad you said it's featureless, so I can stop looking for features. Light buckets did their job then.
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Dahud Lefthanded 27 Oct 17
Is this enough data to make a color swatch? I might want to paint the bathroom in shades of A/2017 U1.
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Asteroid Initiatives 27 Oct 17
What happens to tholins at 0.235 AU? Would they darken?
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Colin 🏳️‍🌈 27 Oct 17
Looks like my last EGG. 😁
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Scott Manley 27 Oct 17
Is there Still no evidence of coma or any activity?
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Tony Jebson 27 Oct 17
Hmm ... tholins?
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Alan Fitzsimmons 27 Oct 17
Replying to @DJSnM @INGLaPalma
nope
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Great Tribulation +++ 27 Oct 17
Can you convert this to audio? 😂
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Alan Fitzsimmons 27 Oct 17
That much red? The neighbours will talk
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Gognitive Demi 27 Oct 17
what are the units of the vertical axis?
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Mike Brown 27 Oct 17
Super cool. slope is something like 25%/100nm? Am I eyeballing that right? So kind of normal-red-KBO type color?
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Alan Fitzsimmons 27 Oct 17
Relative reflectance ie how much light is reflected
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Alan Fitzsimmons 27 Oct 17
Almost, 16
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Mike Brown 27 Oct 17
hmmmmmm. so a little redder even than the reddest trojans. very cool.
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Aidan K. 27 Oct 17
Implies long, cold UV exposure history?
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Alan Fitzsimmons 27 Oct 17
Yep🙂
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Asteroid Initiatives 27 Oct 17
How do tholins survive 9 days with 0.3 AU of the Sun?
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Geraint Jones 27 Oct 17
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Daniel Bamberger 27 Oct 17
No gravitational waves, no audio
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