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#InterstellarComet C/2019 Q4 (Borisov) taken with exactly same equipment and exposure shows noticeably more tail activity this morning than 12 days ago (inset), only 7% closer to Sun 2.67 AU today, down from 2.85 AU on Sept. 8. Perihelion at 2.0 AU in December.pic.twitter.com/HFLuLVqYR5
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New (probably interstellar) Comet C/2019 Q4 (Borisov) on Sept. 8, showing a slightly fuzzy coma and just the hint of a tail to the top right.pic.twitter.com/TyRMWXWFv3
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Just a 15 minute window this morning between the comet rising over rooftops & twilight getting too bright, maybe my last chance to get what is left of Comet C/2017 S3 (PanSTARRS). Aug 03 02:21 UT, 0.48 AU from Sun, 0.78 AU from Earth, elong 27.3°, alt 10°, Sun 15° below horizon.pic.twitter.com/t1L7bknRH5
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Comet C/2017 S3 (PanSTARRS) from the middle of second outburst on July 17 to disintegrating diffuse cloud on Aug 01 02:25 UT when it was 0.53 AU from the Sun, at an elongation of 31.5°, altitude 15° and the Sun 15° below horizon.pic.twitter.com/h1UuDGycYE
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NEO 2018 CB passed within 5.5 Earth diameters on Feb. 9th. The lightcurve shape evolves rapidly as phase changes from gibbous to crescent. See how the weak secondary peak at phase 0.2 becomes as bright as the main peak. Equivalent Moon phase shown to help visualise phase angle.pic.twitter.com/K3dB7SkSzH
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Peter Birtwhistle proslijedio/la je Tweet
RIP Thomas J. Bopp (1949-2018), co-discoverer of comet Hale-Bopp in 1995 (with Alan Hale) https://en.m.wikipedia.org/wiki/Thomas_Bopp …pic.twitter.com/Xv8loyOFyd
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Interstellar interloper A/2017 U1 now getting v faint, last night about 300,000 times fainter than the mag +8 star to the westpic.twitter.com/onG4CYq1xU
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2017 MB1 NEO. Unconfirmed poss. v.faint, thin, straight tail in pa 260°, see CBET 4415 http://www.cbat.eps.harvard.edu/iau/cbet/004400/CBET004415.txt …. PsAng=Anti-solar directionpic.twitter.com/uLxyaKCUje
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C/2017 K2 showing possible traces of asymmetric dust coma at 15.9 AU from Sunpic.twitter.com/0qb2LHVJOb
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C/2017 K2 excess FWHM of 1.7" over nearby field star of similar brightness equates to ~20,000 km diameter at distance of 15.9 AUpic.twitter.com/jSuC9XCXsU
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C/2017 K2 PANSTARRS positions from last night show how uncertain P still is, gen solution suggests anywhere between 2,000 and 70,000 yearspic.twitter.com/6HLXnLrVDO
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Big NEO passed just south of Aldebaran tonight. Didn't need telescope, just handheld smartphone through a pair of 20x80 binocularspic.twitter.com/E4lFIn7zG0
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Newly discovered NEO 2016 VA disappears from view, passing through Earth's shadow between 23:24-23:35 UT on Nov 01, just 0.3 LD from Earth.pic.twitter.com/uXuqJOQkyr
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Another drift scan occultation recorded today, by (268) Adorea. Inset animation is 3x10 sec exposures before & just after eventpic.twitter.com/JZK4uI2koH
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Not much to look at but lots of interest in similarity to C/1915 R1 (Mellish) 101 years ago http://www.cbat.eps.harvard.edu/iau/cbet/004300/CBET004321.txt …pic.twitter.com/1XKy7T2XFO
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Comet C/2016 Q4 (Kowalski) - another distant but apparently active comet. See http://www.cbat.eps.harvard.edu/iau/cbet/004300/CBET004314.txt …pic.twitter.com/eGlhKJBAsI
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Now 3 consecutive nights of Comet 174P/Echeclus outburstpic.twitter.com/4SOj5TLN2a
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174P/Echeclus outburst showing expanding coma over 24 hourspic.twitter.com/vCGfKXrAoJ
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Near Earth Asteroid 2016 QA2 caught at closest approach, taking 30 seconds to pass across field of viewpic.twitter.com/GRSGtmd8hk
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Disc.by LINEAR Oct'15, asteroidal but with a comet-like orbit. Hidetaka Sato found cometary activity, confirmed herepic.twitter.com/5EavEqrxvG
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