[vsnet-chat 1148] Re: EX Hya ephemeris

[Taichi Kato <tkato>]

Beginning
of the period    UTC-TAI (s)
(in UTC)
19720101           -10
19720701           -11
19730101           -12
19740101           -13
19750101           -14
19760101           -15
19770101           -16
19780101           -17
19790101           -18
19800101           -19
19810701           -20
19820701           -21
19830701           -22
19850701           -23
19880101           -24
19900101           -25
19910101           -26
19920701           -27
19930701           -28
19940701           -29
19960101           -30
19970701           -31

  and

  TDT = TAI + 32.184 (s)

  So, we must (at present) subtract ~1 min from TDT to obtain UTC.  This
probably explain about half of the difference.  The amplitude of the
sinusoidal term is 0.00028 d = 0.4 m, which will not suffice to explain the
remaining O-C.

  Thank you very much for the spin amplitude and eclipse depth.  I've now
got pretty reconciled with the visually reported data.

Regards,
Taichi Kato

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