Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.
☄ ⒼⒶⓁⒶⒸⓉⒾⒸ ⓈⓉⓄⓃⒺ - www.galactic-stone.com
Celestron 8SE Dobstuff 13.1": Swayze refigured Coulter mirror, 6 pt mirror cell (2 pt edge support) and CF focuser board made by me StarBlast 4.5 ST80/PortaMount II Zhumell 20x80/Oberwerk 15x70 on a Seronik-style tripod boom mount Hubble Optics 18 inch F/4 mirror.
Quote:Two more videos :Chebarkul Video #7 - http://www.youtube.com/watch?v=NqClUPJQJMU(NOTE - I received some feedback from an expert, and this particular video may be a fake or a different event. He raises some serious concerns about the authenticity. So take this one with a grain of salt until confirmed or denied.)
Michael Creature of the night. Asahi Jupiter (60mm f=800mm) Skywatcher Dob (200mm f=1200mm) ST 80 (80mm f=400mm) PST Ha Solar (40mm f=400mm)
Quote:Thanks Larry! Here is a fun link (but hard to understand) 37 minute compilation video in Russian. Interestingly, at around the 26-28 minute mark, the video shows some large(!) masses that were recovered but not widely reported in the media.
Quote:Electronic Telegram No. 3423Central Bureau for Astronomical TelegramsINTERNATIONAL ASTRONOMICAL UNIONCBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University;20 Oxford St.; Cambridge, MA 02138; U.S.A.e-mail: cbatiau@... (alternate cbat@...)URL http://www.cbat.eps.harvard.edu/index.htmlPrepared using the Tamkin Foundation Computer NetworkTRAJECTORY AND ORBIT OF THE CHELYABINSK SUPERBOLIDEJiri Borovicka, Pavel Spurny, and Lukas Shrbeny, Astronomical Instituteof the Academy of Sciences, Ondrejov, Czech Republic, report that they havecomputed the atmospheric trajectory and velocity of the superbolide of 2013Feb. 15.139 UT (3h20m UT), which caused some damage in the city ofChelyabinsk, Russia. They used seven casual video records provisionallycalibrated with Google Maps tools. The trajectory was assumed to be linear.The geographical coordinates of selected points along the trajectory are astabulated below:Relative Longitude Latitude Height Velocity NotesTime (s) (deg E) (deg N) (km) (km/s)0.00 64.266 54.508 91.83 17.5 beginning ofregistration9.18 61.913 54.788 41.02 17.5 minor flare11.20 61.455 54.836 31.73 17.5 major flare12.36 61.159 54.867 25.81 17.5 flare13.20 60.920 54.891 21.05 12.5 minor flare16.20 60.606 54.922 14.94 4.3 end ofregistrationThe observed trajectory was 254 km long. The azimuth of the trajectory was279.5 degrees, and the slope was 16.5 degrees to the horizontal (for the endpoint). The uncertainty of the radiant is about one degree. The uncertaintyof the position of the trajectory is about 1 km (at the beginning, up to 4km).The pre-entry object that caused the superbolide was relatively fragile.Severe fragmentation started at a height of 32 km under dynamic pressure of 4MPa. The mass of the largest fragment, which landed in the lake Chebarkul,was estimated to be 200-500 kg. One or two meteorites of the mass of severaltens of kg can be expected not far from the village Travniki. One piece ofmass approximately 1 kg may have landed to the northwest of Shchapino.Numerous small fragments can be expected in the wide band located about 5 kmsouth of the trajectory, mostly between longitudes 60.9 and 61.35 degrees.The blast wave, which strongly affected Chelyabinsk, was generatedbetween heights of 25 and 30 km. The radiant and heliocentric orbit werecalculated to be as follows:Apparent radiant: Right ascension 328.6 +/- 1.0 deg(equinox 2000.0) Declination +8.0 +/- 1.0 degVelocity 17.5 +/- 0.5 km/sGeocentric radiant: Right ascension 334.7 +/- 1.2 degDeclination -1.0 +/- 1.4 degVelocity 13.2 +/- 0.7 km/sOrbit: a = 1.55 +/- 0.07 AU e = 0.50 +/- 0.02q = 0.768 +/- 0.011 AU Q = 2.33 +/- 0.14 AU(equinox 2000.0) Peri. = 109.7 +/- 1.8 deg Node = 326.41 degi = 3.6 +/- 0.7 degThe data do not allow determination of the initial mass of the object priorto entering the atmosphere. The trajectory will be further refined in thefuture, provided that proper in situ calibrations of the videos are made.NOTE: These 'Central Bureau Electronic Telegrams' are sometimessuperseded by text appearing later in the printed IAU Circulars.(C) Copyright 2013 CBAT2013 February 23 (CBET 3423) Daniel W. E. Green
Brian S. Johnson
All terrain Z10 http://tinyurl.com/ouxfsyu with refigured primary, 63mm Protostar secondary.
My site: http://www.astronomyisrael.com
TS 130/912 (f 7.10) Triplet Apo Refractor TS 152/1200 (f 7.90) Achromatic Refractor Astrologers say the future is written in the stars but Astronomers know this more so applies to the past... http://www.flickr.com/photos/72473941@N03/