NASA's Stardust spacecraft with streak by the Earth tonight in a gravity assist pass at between 420,000-300,000km. I have low reliability report it may be mag 10. Empheris below. -I'm not planning on chasing this one myself, but here are the numbers. - Kurt http://www.nasa.gov/mission_pages/stardust/main/index.html Date Time Moon_up RA DEC Alt Az Dist kilometers Const 2009-Jan-14 02:00 05 49 19.94 +36 03 32.7 77.4 46.8 4.2E+05 Aur 2009-Jan-14 03:00 05 48 33.38 +36 17 17.2 84.7 58.3 4.0E+05 Aur 2009-Jan-14 04:00 m 05 47 30.82 +36 31 24.6 93.9 69.9 3.7E+05 Aur 2009-Jan-14 05:00 m 05 46 12.51 +36 45 40.7 114.4 81.3 3.5E+05 Aur 2009-Jan-14 06:00 m 05 44 39.39 +36 59 54.5 231.1 84.2 3.3E+05 Aur 2009-Jan-14 07:00 m 05 42 53.10 +37 14 01.0 264.7 73.2 3.0E+05 Aur 2009-Jan-14 08:00 m 05 40 55.74 +37 28 04.5 275.4 61.5 2.8E+05 Aur 2009-Jan-14 09:00 m 05 38 49.72 +37 42 22.0 283.2 50.0 2.6E+05 Aur Ephemeris is from JPL Horizons http://ssd.jpl.nasa.gov/horizons.cgi Settings Ephemeris Type [change] : OBSERVER Target Body [change] : Stardust (bus) Spacecraft (NExT) [-29] Observer Location [change] : Salt Lake City, UT ( 111°53'27.6''W, 40°45'23.0''N ) Time Span [change] : Start=2009-01-14 01:00 UT, Stop=2009-01-15, Step=1 h Table Settings [change] : QUANTITIES=1,4,20,29; range units=KM Display/Output [change] : default (formatted HTML)