HD 175541

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HD 175541
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 18h 55m 40.884s[1]
Declination +04° 15′ 55.17″[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: -6.82 ± 1.01[1] mas/yr
Dec.: -89.23 ± 0.79[1] mas/yr
Parallax (π) 7.87 ± 0.95[1] mas
Distance approx. 410 ly
(approx. 130 pc)
Absolute magnitude (MV) 2.50
Details
Mass 1.65 M
Radius 3.85 R
Surface gravity (log g) 3.72 g cgs
Temperature 5060 ± 44 K
Metallicity -7 ± 4 %
Age 1.9 ± 1 G years
Other designations
BD +04º 3911, GC 25968, GCRV 11376, GJ 736, HIP 92895, SAO 124054.
Database references
SIMBAD data
ARICNS data
Extrasolar Planets
Encyclopaedia
data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

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 410 light years from Earth. Despite its distance of over 100 ly, It was given the number 736 in the Gliese Catalogue of Nearby Stars.

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), USA.[2]

The HD 175541 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >0.61 MJ 1.03 297.3 ± 6 0.33 ± 0.2

See also[edit]

References[edit]

Coordinates: Sky map 18h 55m 40.8837s, +04° 15′ 55.169″