HD 150706

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HD 150706
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Minor[1]
Right ascension 16h 31m 17.583s[2]
Declination +79° 47′ 23.20″[2]
Apparent magnitude (V) 7.016[3]
Characteristics
Evolutionary stage main sequence
Spectral type G0V[4]
B−V color index 0.607±0.005[1]
Distance
91.92 ± 0.03 ly
(28.18 ± 0.01 pc)
Absolute magnitude (MV)4.76[1]
Details
Gyr
TYC 4575-1336-1[7]
Database references
SIMBADdata

HD 150706 is a

apparent visual magnitude of 7.02,[3] it is an easy target for binoculars. It is located only about 10° from the northern celestial pole so it is always visible in the northern hemisphere except for near the equator. Likewise, it is never visible in most of the southern hemisphere. The star is drifting closer to the Sun with a radial velocity of −17.2 km/s.[5]

The Sun-like

star spots. Age estimates are poorly bounded, ranging from 1.16 up to 5.1 billion years.[4]

Based on an infrared excess, a dusty debris disk is orbiting the star. There is a hole in the center of this disk with a radius of ~20 AU. It may be kept free of dust by a planetary system.[8]

Exoplanet

The existence of an exoplanet orbiting this star was announced at the Scientific Frontiers in Research on Extrasolar Planets conference in 2002.[9] The claimed planet had a minimum mass equal to the mass of Jupiter and was thought to be located in an elliptical orbit with a period of 264 days. However independent measurements of the star failed to confirm the existence of this planet.[10]

A different planet was discovered in the system in 2012; this Jupiter-twin completes one orbit in roughly 16 years. Its eccentricity and orbit is very poorly constrained.[4] In 2023, the inclination and true mass of HD 150706 b were determined via astrometry, and its orbit was revised, finding a substantially wider but still poorly constrained orbit with a period of about 36 years.[11]

The HD 150706 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 2.43+0.48
−0.38 MJ 		11.5+5.0
−2.4 		36.0+26.0
−11.0 		0.787+0.076
−0.083 		70+14
−17 or 110+17
−14° 		—

See also

References

  1. ^
    S2CID 119257644
    .
  2. ^
    S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  3. ^
    Bibcode:2000A&A...355L..27H
    .
  4. ^
    S2CID 119109836
    .
  5. ^
    S2CID 52952408
    .
  6. ^
    S2CID 62799777
    .
  7. ^ "HD 150706". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-17.
  8. doi:10.1086/423177
    .
  9. ISBN 1-58381-141-9
    .
  10. S2CID 35682784
    .
  11. ^
    doi:10.1088/1674-4527/accb7e
    .

External links

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