2 Earthlike planets spotted in newly discovered nearby star system

[Admin]

A planetary system with two Earthlike planets has been discovered only 33 light-years away from us.

2 Earthlike planets spotted in newly discovered nearby star system : Read more

 

[rod]

http://exoplanet.eu/catalog/hd_260655_b/ shows properties. Using these properties I calculate P = 2.7691E+00 days. The site list P = 2.76953 days. In 1 Gyr period, 1.3190E+11 or more than 131 billion revolutions of HD 260655 b could take place around the host star. Eccentricity = 0.039 and is large if the exoplanet completed more than 131 billion revolutions. My note. 1 arcsecond = 10 AU diameter size at 10 pc distance for this multi-planet system reported. Directly imaging the two explanets is not likely using current imaging technology and methods. HD 260655 b semi-major axis = 0.02933 AU.

"...The team then looked more closely at TESS data to pin down properties of both planets, including their orbital period and size. They determined that the inner planet, dubbed HD 260655b, orbits the star every 2.8 days and is about 1.2 times as big as the Earth. The second outer planet, HD 260655c, orbits every 5.7 days and is 1.5 times as big as the Earth...", https://phys.org/news/2022-06-astronomers-multiplanet-nearby.html

 

[Helio]

I'm not sure "Earthlike" is the best way to describe these extremely hot exoplanets that are likely tidally-locked in their very close orbit around what is likely a hostile, flaring M-class star.

Other than that, they should be great.

Perhaps "Venuslike" would be better, assuming they have any atmosphere left.

				Percent of HZ width; -200% is
				2x the HZ width toward star]
Name	Radius (E)	Mass (J)	a, AU	Std. Meth.	Temp. Meth	Equil. Temp.	Per., days
HD 260655 b	1.214	0.007	0.029	-193.30%	-190.70%	649K (708F)	2.77
HD 260655 c	1.502	0.01	0.047	-172.50%	-168.30%	510K (458F)	5.71

 

[Helio]

My note. 1 arcsecond = 10 AU diameter size at 10 pc distance for this multi-planet system reported. Directly imaging the two explanets is not likely using current imaging technology and methods. HD 260655 b semi-major axis = 0.02933 AU.

Assuming they had a very effective mask to block all the starlight and not block the light from those very close-orbiting planets, I would bet they would be bright enough for imaging, especially in the IR. It seems unlikely given the masking challenge.

 

[rod]

Yes, *earthlike* exoplanet reports like these two are always interesting to read about. This morning I was swimming laps at a rec center and using the hot jacuzzi. With temperatures hotter than 373 K, that would be a hot swim and hot jacuzzi indeed So good to be on this *earthlike* planet