* Astronomy

Comets C/2009 Y15, 2009 Y16, 2009 Y17 (STEREO)

Orbital elements:
Comet            T              q       e       Peri.    Node     Incl.     C
CK09Y150   2009 Dec.  30.79   0.0050   1.0      95.55     7.30   143.19     M
CK09Y160   2009 Dec.  31.19   0.0047   1.0      65.57   356.77   143.33     M
CK09Y170   2009 Dec.  31.72   0.0051   1.0      84.25     8.96   143.23     M

MPEC 2010 - O31