HD 164595 b

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HD 164595 b
Discovery
Discovered by Courcol et al.
Discovery date10 September 2015
Radial velocity
Orbital characteristics
0.23 AU (34,000,000 km) [1]
Eccentricity 0.0880+0.1200
−0.0660
[1]
40.00±0.24 [1] d
Star HD 164595
Physical characteristics
Mass 16.14±2.72 [1] ME

    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. [1] [2]

    It is speculated to be a Neptune-like gassy planet incapable of supporting life. [3] [4] The planet has a minimal mass of 16 Earth masses. [1]

    Possible radio signal from star system

    A recent (2016) radio signal at 11 GHz (2.7 cm wavelength) has been observed from the HD 164595 stellar system. [5] [6] It is unknown which planet of that stellar system is involved, if any. It could instead be gravitational lensing from a more distant source. [6] SETI investigators are looking into it, [6] [7] [8] but the chances of the signal being from an extraterrestrial civilization are considered slim, at best," [3] with SETI researcher Eric Korpela calling it "uninteresting". [9]

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    <span class="mw-page-title-main">HD 164595</span> Star in the constellation of Hercules

    HD 164595 is a wide binary star system in the northern constellation of Hercules. The primary component of this pair hosts an orbiting exoplanet. The system is located at a distance of 92 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 2.0 km/s. Although it has an absolute magnitude of +4.81, at that distance it is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.07. The brighter star can be found with binoculars or a small telescope less than a degree to the east-northeast of Xi Herculis. HD 164595 has a relatively large proper motion, traversing the celestial sphere at an angular rate of 0.222″ yr−1.

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    References

    1. 1 2 3 4 5 6 "HD 164595 b Confirmed Planet Overview Page". NASA . Retrieved 31 August 2016.
    2. Courcol, Bastien; Bouchy, François; Pepe, Francesco; Santerne, Alexandre; Delfosse, Xavier; Arnold, Luc; Astudillo-Defru, Nicola; Boisse, Isabelle; Bonfils, Xavier (1 September 2015). "The SOPHIE search for northern extrasolar planets". Astronomy & Astrophysics. 581: A38. arXiv: 1506.07144 . Bibcode:2015A&A...581A..38C. doi:10.1051/0004-6361/201526329. ISSN   0004-6361. S2CID   119181352.
    3. 1 2 Plait, Phil (31 August 2016). "No, We Almost Certainly Did Not Detect an Alien Signal". Slate.
    4. Moody, Oliver (31 August 2016). "PAYWALL - Title => Signal from the stars could be ET phoning Earth". The Times . Retrieved 31 August 2016.
    5. Gilster, Paul (27 August 2016). "An Interesting SETI Candidate in Hercules". Centauri Dreams. Retrieved 29 August 2016.
    6. 1 2 3 Griffiths, James (30 August 2016). "Hear me now? 'Strong signal' from sun-like star sparks alien speculation". CNN . Retrieved 30 August 2016.
    7. 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.
    8. Staff (29 August 2016). "Mystery radio signal may be from distant star system – or a military transmitter". KurzweilAI . Retrieved 31 August 2016.
    9. Korpela, Eric (29 August 2016). "Uninteresting from a SETI point of view".