HD 175541

HD 175541 is an intermediate-mass subgiant star in the constellation Serpens. That means when this star was a main-sequence, it was an A-type star. It is an 8th magnitude star about 424 light years from Earth. Despite its distance of over 100 ly, It was given the number 736 in the Gliese Catalogue of Nearby Stars.

HD 175541
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 18h 55m 40.8840s[1]
Declination +04° 15 55.1623[1]
Apparent magnitude (V) 8.03
Characteristics
Spectral type G8IV
U−B color index 0.56
B−V color index 0.9
R−I color index 0.33
Astrometry
Radial velocity (Rv)18.4 ± 2 km/s
Proper motion (μ) RA: −6.744±0.099[1] mas/yr
Dec.: −90.226±0.084[1] mas/yr
Parallax (π)7.6877 ± 0.0595[1] mas
Distance424 ± 3 ly
(130 ± 1 pc)
Absolute magnitude (MV)2.50
Details
Mass1.65 M
Radius3.85 R
Surface gravity (log g)3.72 g cgs
Temperature5060 ± 44 K
Metallicity-7 ± 4 %
Age1.9 ± 1 G years
Other designations
Kaveh, BD+04º 3911, GJ 736, HIP 92895, SAO 124054[2]
Database references
SIMBADdata
ARICNSdata
Extrasolar Planets
Encyclopaedia
data

The star HD 175541 is named Kaveh. The name was selected in the NameExoWorlds campaign by Iran, during the 100th anniversary of the IAU. Kaveh is one of the heroes of Shahnameh.[3][4]

In April 2007, the planet was found orbiting around one of the three preferred intermediate-mass subgiants that has changes in radial velocity trends, from Lick and Keck Observatories in Mount Hamilton (California) and Mauna Kea (Hawai'i), United States.[5]

The HD 175541 planetary system[6]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥0.598±0.029 MJ 0.975±0.087 298.43±0.45 0.110±0.049

See also

References

  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. "HD 175541". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-11.
  3. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  5. Johnson, John Asher; et al. (2007). "Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants". The Astrophysical Journal. 665 (1): 785–793. arXiv:0704.2455. Bibcode:2007ApJ...665..785J. doi:10.1086/519677.
  6. Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0.


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