HD 164595 b

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HD 164595 b
Exoplanet List of exoplanets
Parent star
Star HD 164595
Right ascension (α) 18h 00m 38.89s[1]
Declination (δ) +29° 34′ 34.9″[1]
Spectral type G2V[1]
Mass (m) 0.990±0.030 M
Temperature (T) 5790±40 K
Metallicity [Fe/H] -0.040±0.080
Orbital elements
Semi-major axis(a) 0.23[1] AU
Eccentricity (e) 0.0880+0.1200
Orbital period(P) 40.00±0.24[1] d
Physical characteristics
Mass(m)16.14±2.72[1] M
Discovery information
Discovery date 10 September 2015
Discoverer(s) Courcol et al.
Discovery method Radial velocity
Discovery status Published

HD 164595 b is a confirmed exoplanet orbiting around a Sun-like star HD 164595 every 40 days some 94.36 light-years away. It was detected with the radial velocity technique with the SOPHIE echelle spectrograph. The planet has a minimal mass equivalent of 16 Earths.[2][3]

It is believed to be a Neptune-like gassy planet incapable of supporting life.[4][5] The planet has a minimal mass of 16 Earth masses.[1]

Possible radio signal from star system[edit]

A recent (2016) radio signal at 11 GHz (2.7 cm wavelength) has been observed from the HD 164595 stellar system.[6][7] It is unknown which planet of that stellar system is involved, if any. It could instead be gravitational lensing from a more distant source.[7] SETI investigators are looking into it,[7][8][9] but the chances of the signal being from an extraterrestrial civilization are considered slim, at best.[4][10]


  1. ^ a b c d e f g h "HD 164595 b Confirmed Planet Overview Page". NASA. Retrieved 31 August 2016. 
  2. ^ "HD 164595 b Confirmed Planet Overview Page". NASA. Retrieved 31 August 2016. 
  3. ^ Courcol, B.; Bouchy, F.; Pepe, F.; Santerne, A.; Delfosse, X.; Arnold, L.; Astudillo-Defru, N.; Boisse, I.; Bonfils, X. (2015-09-01). "The SOPHIE search for northern extrasolar planets". Astronomy & Astrophysics. 581. arXiv:1506.07144Freely accessible. Bibcode:2015A&A...581A..38C. doi:10.1051/0004-6361/201526329. ISSN 0004-6361. 
  4. ^ a b Plait, Phil (31 August 2016). "No, We Almost Certainly Did Not Detect an Alien Signal". 
  5. ^ Moody, Oliver (31 August 2016). "PAYWALL - Title => Signal from the stars could be ET phoning Earth". The Times. Retrieved 31 August 2016. 
  6. ^ Gilster, Paul (27 August 2016). "An Interesting SETI Candidate in Hercules". Centauri Dreams. Retrieved 29 August 2016. 
  7. ^ a b c Griffiths, James (30 August 2016). "Hear me now? 'Strong signal' from sun-like star sparks alien speculation". CNN. Retrieved 30 August 2016. 
  8. ^ SETI observations on the RATAN-600 telescope in 2015 and detection of a strong signal in the direction of HD 164595 Bursov N., Filippova L., Filippov V., Gindilis L., Maccone C. et al. 2016 | in " IAA SETI Permanent Committee", Guadalajara, Mexico.
  9. ^ Staff (29 August 2016). "Mystery radio signal may be from distant star system — or a military transmitter". KurzweilAI. Retrieved 31 August 2016. 
  10. ^ Korpela, Eric (29 August 2016). "Uninteresting from a SETI point of view".