At 17:58 27/03/00 , Mark Harris wrote: >I read somewhere that Mir & the ISS orbit at 92 and 91 minutes respectively (or vice versa). Because of this one-minute "gain", does this mean that, in some forseeable point in the future, we'll be able to see both of them in one viewing? (Obviously, it won't be for a while yet... and I'm probably way wrong.) > >Mark >Lat: 50.909 N >Lng: 2.789 W Mark, I give below current TLEs for both MIR and ISS, at epochs close together ( day 86.8768.. for MIR, 87.0391.. for ISS) The 4th number on line 2 for both( counting the id line as line 0), gives the right ascension of the ascending node. This reveals that although they have a common inclination , the orbit planes are separated by about 120 degrees. This means that even if they crossed the equator at the same time, they would be separated by 120 degrees in longitude. At your latitude near the northern apex this is even more restrictive. At my latitude it is just possible to have a N-S and a S-N pass of both objects during a summer evening or late summer evening Tony Beresford 34.9638S, 138.6333E Mir Complex 32.7 4.2 0.0 1.6 v 395 337 x 333 km 1 16609U 86017A 00086.87683184 .00086142 00000-0 48531-3 0 4577 2 16609 51.6495 320.7718 0002866 113.0497 247.0806 15.78453481806185 ISS 20.0 4.0 0.0 2.5 d 70 362 x 351 km 1 25544U 98067A 00087.03918981 .00067866 00000-0 53316-3 0 4858 2 25544 51.5873 200.4857 0008089 342.0840 350.6863 15.70833609 77000 ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Mon Mar 27 2000 - 01:59:05 PST