A notification from the Joint Space Operations Center, Vandenberg Air Force Base, California USA is included below.

** from RT-sat Tracking SL-8-DEB is NORAD ID: 14803 Int'l Code: 1978-019D Perigee: 638.7 km Apogee: 643.0 km Inclination: 74.0° Period: 97.4 min Semi major axis: 7,011.8 km Launch date: February 17, 1978 Source: Commonwealth of Independent States (former USSR) (CIS)

Note: This is SATELLITE DEBRIS **

...

Good luck TIsat-1!

Please everybody, carefully monitor TIsat-1 tonight, after the "Close Approach" event and let the us know.

Thanks. 73 de HB9TYP, Paolo (for the SSL-Team)

Current TLE for TIsat-1 TISAT-1 1 36799U 10035E 11039.11057425 .00000386 00000-0 57862-4 0 5638 2 36799 98.1183 106.0176 0014989 338.4407 21.6186 14.80307471 31213

TLE of "Secondary Object: SCC# 14803" SL-8-DEB 1 14803U 78019D 11044.31259166 .00000858 00000-0 12192-3 0 3166 2 14803 074.0339 031.3702 0003041 155.8770 204.2503 14.78616914598332

-------- Messaggio originale -------- Oggetto: TISAT 1 Close Approach Data: Sun, 13 Feb 2011 22:52:14 -0800 Mittente: JSpOC Space Correspondence JSpOCSpaceCorrespondence@vandenberg.af.mil A: paolo.ceppi@supsi.ch CC: JSpOC Space Correspondence JSpOCSpaceCorrespondence@vandenberg.af.mil

Sir/Ma'am,

The United States Joint Space Operations Center (JSpOC) has identified a predicted conjunction between TISAT 1 (SCC# 36799) and SCC# 14803.

Primary Object: TISAT 1 (SCC# 36799) Secondary Object: SCC# 14803 Time of Closest Approach: 14 FEB 2011 17:57 UTC

Overall miss distance: 88 meters Radial (dU) miss distance: 85 meters In-Track (dV) miss distance: 19 meters Cross-track (dW) miss distance: -15 meters

Primary Radial Error (U): 5 meters Primary In-track Error (V): 140 meters Primary Cross-track Error (W): 2 meters

Secondary Radial Error (U): 21 meters Secondary In-track Error (V): 353 meters Secondary Cross-track Error (W): 19 meters

Please reply to this message to acknowledge receipt of this close approach notification.

It is possible to provide another estimate using owner/operator ephemeris data. If the satellite operator is interested please have them reply to all addresses listed in the Cc line. Email is the preferred method of communication.

Thank you for your time and assistance. Please contact us if there are any questions.

Very Respectfully,

JSpOC Orbital Protection Team Joint Space Operations Center Vandenberg Air Force Base, California USA Comm: 1-805-605-3533 Fax: 1-805-605-3507 JSpOCSpaceCorrespondence@vandenberg.af.mil

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