StartDate: 20090520 Object: xo1 Observer: Norby, Bill (NWP) E-mail : wpnorby@prodigy.net Location: Missouri Latitude: +38.7875 ELongitude: -90.59083 Aperture: 10-inch Filter: BB Exposure: 45 sec ClkCorrn: 0 Comment: 10 min pre-ingress, clear, wind 5-10 mph, no moon, start time 60 minutes after local sunset Comment: Differential Photometry using four reference stars Loss column: N 2454971.5906603 -0.1795 2454971.5912578 -0.1760 2454971.5918591 -0.1741 2454971.5924642 -0.1785 2454971.5930694 -0.1797 2454971.5936678 -0.1776 2454971.5942664 -0.1732 2454971.5948682 -0.1829 2454971.5954707 -0.1768 2454971.5960720 -0.1798 2454971.5972804 -0.1788 2454971.5978809 -0.1698 2454971.5984836 -0.1857 2454971.5990859 -0.1733 2454971.5996857 -0.1778 2454971.6002825 -0.1690 2454971.6008868 -0.1784 2454971.6014929 -0.1714 2454971.6026954 -0.1685 2454971.6032985 -0.1675 2454971.6038999 -0.1753 2454971.6044988 -0.1646 2454971.6050993 -0.1597 2454971.6056986 -0.1629 2454971.6063034 -0.1671 2454971.6069085 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