HD 164595 [1] is a G-type star located in the constellation of Hercules, 28.927 parsecs (about 94.4 light-years) from Earth. [2][3] With an apparent magnitude of 7.075,[1] the star can be found with binoculars or a low-power telescope by reference to nearby Vega in the constellation Lyra.[citation needed]
HD 164595 has one known planet, HD 164595 b, which orbits HD 164595 every 40 days. It has a mass equivalent to 16 Earths.
It is the same Stellar classification as the Sun: G2V. It has a similar temperature, at 5,790K compared with 5,778K for the Sun. It has a lower metallicity, at -0.06 compared with 0.00, and a slightly younger age, at 4.5 vs. 4.6 Gyr.[4][5] Some scientists have classified it as Sun 2.0. An exact solar twin would be a G2V star with a 5,778K temperature, be 4.6 billion years old, with the correct metallicity and a 0.1% solar luminosity variation.[6] Stars with an age of 4.6 billion years are at the most stable state. Proper metallicity and size are also very important to low luminosity variation. [7][8][9]
An international team of researchers is now examining the radio signal and its star, HD 164595 -- described in a paper by Italian astronomer Claudio Maccone and others as a "strong candidate for SETI" -- in the hopes of determining its origin. "The signal from HD 164595 is intriguing, because it comes from the vicinity of a sun-like star, and if it's artificial, its strength is great enough that it was clearly made by a civilization with capabilities beyond those of humankind," astronomer Douglas Vakoch, president of METI International, which searches for life beyond Earth, tells CNN.Nobody knows what was spotted by the RATAN-600 telescope in Russia, partly because its operators kept the observation under their hats for more than a year, and partly because it hasn't been repeated. Hence even though a signal in the 2.7 cm wavelength (11 GHz band) was spotted for four seconds on May 15, 2015
As of this date SETI Network is unable to monitor the 2.7 cm part of the band.