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-l >> >>> >> >> >> >> _______________________________________________ >> Seesat-l mailing list >> https://lists.seesatmail.org/mailman/listinfo/seesat-l >> > _______________________________________________ Seesat-l mailing list https://lists.seesatmail.org/mailman/listinfo/seesat-lReceived on Wed May 14 2025 - 11:30:06 UTC
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