Is this a Hot Jupiter?

zehcoutinho

Z
151814


151815
 

Sapyx

Sapyx
Every Class IV and Class V gas giant is, by definition, hot (that's part of the definition of being a Class IV or V gas giant), and a "Jupiter". So from that point of view, every Class IV and Class V gas giant is a "hot Jupiter".

The term is, however, usually applied to gas giants that orbit very close to their stars. The current IAU definition is "a gas giant with an orbital period less than 10 Earth days". Yours has an orbital period of 0.3 Earth days, so it definitely qualifies in that respect as well.

Or to put it another way: that planet could be a lot colder, and a lot further out from its star, and still qualify as a "hot Jupiter".
 

zehcoutinho

Z
Sapyx said:
Every Class IV and Class V gas giant is, by definition, hot (that's part of the definition of being a Class IV or V gas giant), and a "Jupiter". So from that point of view, every Class IV and Class V gas giant is a "hot Jupiter".

The term is, however, usually applied to gas giants that orbit very close to their stars. The current IAU definition is "a gas giant with an orbital period less than 10 Earth days". Yours has an orbital period of 0.3 Earth days, so it definitely qualifies in that respect as well.

Or to put it another way: that planet could be a lot colder, and a lot further out from its star, and still qualify as a "hot Jupiter".
Click to expand...

Thanks! The planet doesn't orbit the main star, so I don't know the distance it is from the star it orbits. Is there a way to calculate this from the astronomical info the game gives?
 

Sapyx

Sapyx
Yes: the semi-major axis is the "average radius" of an elliptical orbit; for circular or near-circular orbits (like this one), it is effectively the orbital radius. 1285025 km is equal to 4.29 Ls, which would be closer to the star than the Arrival Point, if this star were a primary star.
 
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