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SpaceEngineer
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First exomoon candidate!

27 Jul 2017 08:24

Exoplanet Kepler-1625 b is a gas giant orbiting a G-type star in a relatively wide 287.38 days-long orbit. It was confirmed in 2016. Recently the HEK project (Hunt for Exomoons with Kepler) reported a new discovery - first significant exomoon candidate, orbiting this planet. Despite on only 3 transits that was observed, the exomoon signal could be clearly seen on the light curve, blending with the parent planet's signal:

Kepler-1625b.png
Kepler-1625b.png (81.59 KiB) Viewed 2464 times


Calculation shows that moon is a Neptune-sized body (!) separated by a 19 planetary radii from its parent planet. Uncertainty in the radius of the parent star is high (some recent works increased it 2 times compared to 2016 data), so both planet and moon could have significantly different radius than provided. But the parent planet's mass was derived from photometry, and being approximately 10 Jupeter's masses. This increases probability of existence of such a large moon.

Link to the scientific article.

The next transit of this system is expected in October 2017, and the team requested the time on the Hubble Space Telescope.

Addon for SE 0.980: 
Kepler-1625.pak
(1.15 KiB) Downloaded 316 times


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Screenshot of the planet and its moon transiting the disk of the parent star (0.981):

scr00786.jpg
 
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Starlight Glimmer
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First exomoon candidate!

27 Jul 2017 08:34

Wow! This is amazing news! 
 
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Hornblower
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First exomoon candidate!

27 Jul 2017 09:17

It produces a spectacular ring eclipse
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"Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space." - Douglas Adams
 
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XBrain130
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First exomoon candidate!

27 Jul 2017 10:18

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"wow, that's... big" -Bill Wurtz, "history of the entire world, i guess" (2017)
SpaceEngine's Italian Discord server: https://discord.gg/NhQbEbC
 
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Betelgeuze
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First exomoon candidate!

27 Jul 2017 13:35

It's working with SE 0.9.7.3 :) Unfortunately i can't test on SE 0.9.8.0 due to my computer too old, lack of RAM and crashes blue screen of death

Image

Image
 
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Quarior
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First exomoon candidate!

27 Jul 2017 23:33

Nice and congrulations for people discover the first exomoon.
Maybe we will found a Terra (exo)moon breathable or/and the first (exo)moon orbit a (exo)moon orbit the planet...
 
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Watsisname
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First exomoon candidate!

28 Jul 2017 02:14

Something we've been hoping to see for a long time.  Looking forward to the data from the next transit. :)
 
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Palauan
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First exomoon candidate!

08 Jul 2018 12:02

That moon is huge... it may be a binary planet system

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