* Astronomy

Orbital elements:
2003 EH1
Epoch 2003 Mar. 2.0 TT = JDT 2452700.5                  MPC
M   0.37663              (2000.0)            P               Q
n   0.27413968     Peri.  175.38955     -0.22050074     -0.36293089
a   2.3468650      Node   284.41597     +0.86235221     +0.36118355
e   0.5007873      Incl.   69.19326     +0.45577197     -0.85896892
P   3.60           H   16.8           G   0.15
From 17 observations 2003 Mar. 6-7.

MPEC 2003 - E27

On March 6, 2003, the Lowell Observatory Near-Earth Object Survey - LONEOS telescope (Observer B. A. Skiff) discovered near-Earth asteroid 2003 EH1. I found that the aphelion of 2003 EH1 is precisely at the peak of the meteoroid distribution. The orientation of the orbit is close to that expected, with no significant discrepancy in the argument of perihelion and inclination, and only a slight offset in the rapidly evolving node. Indeed, the theoretical radiant and speed for a shower from 2003 EH1 (RA = 229.9, DEC = +49.6, Vg = 40.2 km/s at lo = 282.9 - J2000) falls in the middle of those measured for the Quadrantids by the Dutch Meteor Society observers.
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The debris stream that makes the Quadrantids was created when a comet designated C/1490 Y1 broke up five centuries ago.