Ruben, can you ask for close up pictures of the intact areas of fiber and of some of the ends of loose fibers as the tank covering unwound with the heat and shock of Reentry and impact? Black implies carbon fiber, but essentially everything turns black in Reentry heating. There are signs of different colors on some unwrapped ends but that might be advanced decomposition as they got heated more extremely. Western programs use Carbon Fiber almost without exception. China has used various mixtures, trending towards carbon fiber. Russia uses lighter brown or yellow kevlar or similar aramid fibers but starting to use carbon fiber. Also, the people should be careful with the insides of the tanks. Four implies standard hydrazine fuel (one of several hydrazine types) and nitrogen tetroxide oxidizer, two tanks of each. Nitrogen tetroxide does severe lung damage if inhaled (“Big Fucking Red Clouds” are very dangerous) and all of the hydrazines cause liver and kidney damage and cancer, with monomethyl hydrazine and unsymmetrical dimethyl hydrazine much worse than straight hydrazine. There are probably some residues. Thank you. Be safe, everyone. -george Sent from my iPhone > On May 14, 2025, at 1:47 PM, ruben lianza via Seesat-l <seesat-l_at_lists.seesatmail.org> wrote: > > Thank you so much Jonathan. > > On picture #2 the angle "i" was measured respect to the local parallel only. > > By considering the latitude, Rob Mac Naught calculated an orbital > inclination of 34.3°. > > I would love to know how that calculation is possible not knowing the sat > velocity nor having any TLE to propagate. > > So here us my qyestion: > Is there any simplified formula for that, which includes latitud and local > parallel angle on the first member and orbital inclination on the second > member ( perhaps, assuming a perfectly circular orbit therefore a constant > orbital velocity) ? > > Any comments / suggestions will be infinitelly appreciated. > > All the best. > > Ruben > > El mié, 14 de may de 2025, 15:10, Jonathan McDowell <planet4589_at_gmail.com> > escribió: > >> I have placed Ruben's images at >> https://planet4589.org/space/misc/arg1.jpg >> https://planet4589.org/space/misc/arg2.jpg >> >>> On Wed, 14 May 2025 at 14:01, ruben lianza via Seesat-l < >>> seesat-l_at_lists.seesatmail.org> wrote: >>> >>> Michael: >>> >>> Just as expected, the attachment didn't come through. >>> Our emails have a 300 KB limit. >>> >>> Here is the rejection message: >>> Your message is being held until the list moderator can review it for >>> approval. >>> The reason it is being held: >>> Message body is too big: 486834 bytes with a limit of 300 KB >>> >>> Sorry for the inconvenience >>> >>> I wish there were email addresses where one could send pics at least to a >>> few really interested members. >>> >>> All the best >>> >>> Ruben >>> >>> El mié, 14 may 2025 a las 13:36, ruben lianza (<rubenlianza_at_gmail.com>) >>> escribió: >>> >>>> Hi Michael: >>>> >>>> I am attaching a map which contains pics on all four cylinders . >>> Although >>>> I am not sure if it will get through. >>>> Keep your fingers crossed. >>>> >>>> El mié, 14 may 2025 a las 12:30, Michael Clive (<zeinin_at_gmail.com>) >>>> escribió: >>>> >>>>> Can you share photos? I can make some assessments of materials and >>>>> methods of construction. Were they spherical or capsule tanks? >>>>> >>>>> On Wed, May 14, 2025 at 8:15 AM ruben lianza via Seesat-l < >>>>> seesat-l_at_lists.seesatmail.org> wrote: >>>>> >>>>>> Thanks for your quick and valuable reply Rob. >>>>>> >>>>>> I have narrowed down to about five candidates reentering around those >>>>>> dates. >>>>>> >>>>>> Cheers. >>>>>> >>>>>> Ruben >>>>>> >>>>>> El mié, 14 may 2025 a las 2:43, <robmcnaught_at_westnet.com.au> >>> escribió: >>>>>> >>>>>>> Hi all, >>>>>>> The direction of motion of a satellite relative to a geographic >>>>>> parallel >>>>>>> is dependent on the latitude of the location. For example, for an >>>>>> orbital >>>>>>> inclination of 12.0deg, a satellite cannot pass overhead at a >>>>>> geocentric >>>>>>> latitude greater than 12.0deg N or 12.0degS and would be moving due >>>>>> east >>>>>>> (Az=90deg) at the north and south apex. It would only have an angle >>> of >>>>>> + or >>>>>>> - 12.0 deg when crossing the equator. >>>>>>> >>>>>>> The geographical/geodetic latitude of Armstrong/Bustinza is ~32.76S >>>>>> which >>>>>>> represents a geocentric latitude of 32.59S. For an azimuth of >>> 78.56deg >>>>>> at >>>>>>> this geocentric latitude, the implied orbital inclination is >>> 34.3deg. >>>>>> Hope >>>>>>> this helps in narrowing down the candidates. >>>>>>> >>>>>>> Cheers, Rob >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wed May 14 2025 ruben lianza via Seesat-l < >>>>>>> seesat-l_at_lists.seesatmail.org> wrote: >>>>>>> ---------- Original Message ---------- >>>>>>> >>>>>>> Dear Ted, Marco and Sat Obs members: >>>>>>> I have been working all last weekend in the recovery and >>> investigation >>>>>> of >>>>>>> provenance of three high pressure cylinders that have fallen near >>> the >>>>>>> cities of Armstrong and Bustinza, Province of Santa Fe, Argentina. >>>>>>> >>>>>>> Their crash sites are remarkably aligned in a straight line, within >>> a >>>>>> 12 >>>>>>> miles long x 90 yards wide corridor, heading 78.56 °. The angle of >>> the >>>>>>> corridor respect to the nearest parallel is about 12° which I >>> assume is >>>>>>> coincident with its orbital inclination. _______________________________________________ Seesat-l mailing list https://lists.seesatmail.org/mailman/listinfo/seesat-lReceived on Wed May 14 2025 - 19:01:10 UTC
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