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Table 1.

Orbital parameters of J0243 from the Fermi/GBM data.

Epoch of 90° mean longitude Tπ/2 (JED) 2458116.0970
Orbital period Porb (d) 27.698899
Period derivative orb (d d−1) 0.000000
Projected semimajor axis ax sin i (lt-s) 115.531
Longitude of periastron ω (deg) −74.05
Eccentricity e 0.1029

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