'Dead' telescope discovers Jupiter's twin from beyond the grave

K2-2016-BLG-0005Lb is an interesting exoplanet report.

Reference paper, Kepler K2 Campaign 9: II. First space-based discovery of an exoplanet using microlensing, https://arxiv.org/abs/2203.16959, 31-March-2022. "We report on the discovery of a bound exoplanetary microlensing event from a blind search of data gathered from Campaign 9 of the Kepler K2 mission (K2C9). K2-2016-BLG-0005Lb is a densely sampled, binary caustic-crossing microlensing event with caustic entry and exit points that are resolved in the K2C9 data, enabling the lens-source relative proper motion to be measured. We have fitted a binary microlens model to the K2 dataset, and to simultaneous observations from the Optical Gravitational Lensing Experiment (OGLE-IV), Canada-France-Hawaii Telescope (CFHT), Microlensing Observations in Astrophysics (MOA-2), the Korean Microlensing Telescope Network (KMTNet), and the United Kingdom InfraRed Telescope (UKIRT). Whilst the ground-based data only sparsely sample the binary caustic, they provide a clear detection of parallax that allows us to break completely the microlensing mass-position-velocity degeneracy and measure the planet's mass directly. We find a host mass of 0.58±0.03 M⊙ and a planetary mass of 1.1±0.1 MJ. The system lies at a distance of 5.2±0.2 kpc from Earth towards the Galactic bulge. The projected physical separation of the planet from its host is found to be 4.2±0.3 au which, for circular orbits, corresponds to a=4.4+1.9/−0.4 au and period P=13+9/−2 yr, making K2-2016-BLG-0005Lb a close Jupiter analogue. Though previous exoplanet microlensing events have included space-based data, this event is the first bound microlensing exoplanet to be discovered from space-based data. Even through a space telescope not designed for microlensing studies, this result highlights the advantages for exoplanet microlensing discovery that come from continuous, high-cadence temporal sampling that is possible from space. (Abridged)."

My observation. Using the properties in the abstract, my calculation shows P = 1.2108E+01 or 12.108 years. In 1 Gyr period, the exoplanet could complete 8.2587E+07 or 82.587 million revolutions around the host star. The 0.58 Msun host, appying the MMSN suggests a protoplanetary disk size 1.931165E+03 or 1931.165 earth masses. The exoplanet is 3.4960E+02 or 349.60 earth masses.
 

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