WASP-45

K-type main sequence star in the constellation of Sculptor From Wikipedia, the free encyclopedia

WASP-45 is a K-type main-sequence star about 701 light-years (215 parsecs) away. The star's age cannot be well constrained, but it is probably older than the Sun. Yet, WASP-45 is enriched in heavy elements compared to the Sun, having 240% of the solar abundance.[4]

Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
WASP-45
Observation data
Epoch J2000      Equinox J2000
Constellation Sculptor
Right ascension 00h 20m 56.99413s[1]
Declination −35° 59 53.7466[1]
Apparent magnitude (V) 11.8[2]
Characteristics
Spectral type K2V[3]
Astrometry
Radial velocity (Rv)4.71±0.33[1] km/s
Proper motion (μ) RA: 52.831 mas/yr[1]
Dec.: −46.940 mas/yr[1]
Parallax (π)4.6520±0.0226 mas[1]
Distance701 ± 3 ly
(215 ± 1 pc)
Details[4]
Mass0.932+0.045
−0.046
 M
Radius0.891±0.013 R
Luminosity0.510±0.013 L
Surface gravity (log g)4.508+0.023
−0.025
 cgs
Temperature5167±29 K
Metallicity [Fe/H]0.388+0.090
−0.10
 dex
Rotational velocity (v sin i)2.3±0.7 km/s
Age5.4+4.7
−3.5
 Gyr
Other designations
TOI-229, TIC 120610833, WASP-45, TYC 6996-583-1, GSC 06996-00583, 2MASS J00205699-3559537[2]
Database references
SIMBADdata
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The star has low ultraviolet emission, therefore it is suspected to have a low starspot activity,[5] although chromospheric activity was reported elsewhere.[3]

There is a companion star at a separation of 4.4 arcseconds, corresponding to 929 AU.[6]

Planetary system

In 2011 a transiting hot Jupiter planet, WASP-45b, was detected.[3] The planet equilibrium temperature is 1170±24 K. No Rayleigh scattering was detected in the planetary atmosphere, implying the existence of hazes or a high cloud deck.[7]

More information Companion (in order from star), Mass ...
The WASP-45 planetary system[7][4]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 1.018+0.046
−0.045
 MJ
0.04089+0.00065
−0.00069
3.1260876(35)[8] <0.043[8] 84.686±0.098° 0.978+0.026
−0.024
 RJ
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References

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