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Planet Hunters Blog


10 Jun 2021, 11:29 UTC
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Planet Hunters TESS finds an exciting two-planet system

We have some exciting news – you helped discover another exciting planet system: TIC 349488688 (also known as HD 152843). This exciting discovery follows on from our validation of the long-period planet around an evolved (old) star, TOI-813, and from our recent paper outlining the discovery of 90 Planet Hunters TESS planet candidates, which give us encouragement that there are a lot more exciting systems to be found with your help!

The new exoplanetary system, TIC 349488688, consists of two planets that are similar in size to Neptune and Saturn in our own solar system, orbiting around a bright star that is similar to our own Sun. Planet b is around 3.4 times the size of the Earth, and takes around 12 days to complete an orbit around the star. The outer planet, planet c, is around 5.8 times the size of the Earth and has an orbital period somewhere in the range of 19 to 35 days. The paper has been published by the Monthly Notices of the Royal Astronomical Society (MNRAS) journal and you can find a version of it on arXiv at: https://arxiv.org/abs/2106.04603

Figure 1: the arXiv version of ...

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