We know that Juno is blue (or cyan), and a star's color is based on it's temperature which indicates how hot a star is.
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After doing some research, i found out that Blue Stars are hotter than Yellow or Red stars.
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-Tempratures
Blue star: ˜44,540°F (24,726°C)
Yellow Star: ˜10,340°D (5,726°C)
Red star: ˜4,940°F (2,726°C)
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So in conclusion, Juno is 4.4x hotter than our sun if it's based on scientific research.
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The real question is, is juno really that hot?
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242 Derericone year ago
Yes, Juno should be hotter than the Sun, but I'm not so sure about your temperatures. Because the temperature of the individual star classes extends over a relatively large range.
Juno is an (really rare) B-Type subdwarf and his surface temperature should be somewhere between 15000 and 40000°K (average ~28000°K)
That's astonishing, because of his typical mass, wich is only round about the half of the Sun.
Normally the rule applies that hotter stars have more mass than cooler ones, which is why most blue stars are actually among the largest. Stars with the mass of an star like Juno have an surface temperature between 2000 and 3500°K.The sun has an surface temperature of 5772°K and is a typical, A typical, so-called main sequence star, which has an average temperature of 5300 - 6000°K and a mass between 0.9 and 1.4 Solar masses.
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Juno is actually a theoretical class of stars that has not yet been observed because the universe is not old enough for them to exist yet (similar to a black dwarf).
Wikipedia at least suggest that simulations predicting this star class ended up with surface temps. around 8600 Kelvin.