WASP-63

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WASP-63
Observation data
Epoch J2000       Equinox J2000
Constellation Columba
Right ascension 06h 17m 20.7485s [1]
Declination −38° 19 23.754 [1]
Apparent magnitude  (V)11.10±0.08 [2]
Characteristics
Evolutionary stage subgiant [1] [2]
Spectral type G8 [3]
B−V color index 0.741±0.022 [4]
J−K color index 0.425±0.032 [4]
Astrometry
Radial velocity (Rv)−23.55±0.25 [1]  km/s
Proper motion (μ)RA: −17.469  mas/yr [1]
Dec.: −27.292  mas/yr [1]
Parallax (π)3.4609 ± 0.0118  mas [1]
Distance 942 ± 3  ly
(288.9 ± 1.0  pc)
Details
Mass 1.10+0.06
0.04
[5]   M
Radius 1.76+0.11
0.08
[5]   R
Luminosity 2.76 [1]   L
Surface gravity (log g)4.01±0.03 [6]   cgs
Temperature 5715±60 [6]   K
Metallicity [Fe/H]0.08±0.07 dex [5]
0.28±0.05 [6]   dex
Rotational velocity (v sin i)2.8±0.5 [5]  km/s
Age 8.3+1.3
1.2
[5]   Gyr
Other designations
Kosjenka, CD−38 2551, TOI-483, WASP-63, TYC  7612-556-1, GSC  07612-00556, 2MASS J06172074-3819237 [7]
Database references
SIMBAD data

WASP-63 or Kosjenka, also known as CD-38 2551, is a single star with an exoplanetary companion in the southern constellation of Columba. It is too faint to be visible with the naked eye, having an apparent visual magnitude of 11.1. [2] The distance to this system is approximately 942 light-years (289 parsecs ) based on parallax measurements, but it is drifting closer with a radial velocity of −24 km/s.

Contents

Nomenclature

The designation WASP-63 indicates that this was the 63rd star found to have a planet by the Wide Angle Search for Planets.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project. [8] The approved names, proposed by a team from Croatia, were announced in June 2023. WASP-63 is named Kosjenka and its planet is named Regoč, after characters from Croatian Tales of Long Ago by Ivana Brlić-Mažuranić. [9]

Stellar properties

This is a G-type star with a stellar classification of G8; [3] the luminosity class is currently unknown. The star is much older than the Sun at approximately 8.3+1.3
1.2
billion years. WASP-63 is slightly enriched in heavy elements, having 120% of the solar abundance of iron. [5] The stellar radius is enlarged for a G8 star, [3] and models suggest it has evolved into a subgiant star. [1] It has 1.1 times the mass of the Sun and is spinning with a projected rotational velocity of 3 km/s. [5]

Planetary system

In 2012 a transiting gas giant planet WASP-63b was detected on a tight, circular orbit. [3] Its equilibrium temperature is 1536±37  K , and measured dayside temperature is 1547±308  K . [10] The planet is similar to Saturn in mass but is highly inflated due to proximity to the parent star. The planetary atmosphere contains water and likely has a high cloud deck of indeterminate composition. [11]

The WASP-63 planetary system [5]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b / Regoč0.339±0.03  MJ 0.05417+0.00067
0.00089
4.3780900±0.0000060.026+0.040
0.029
87.8±1.3° 1.33±0.24  RJ

Related Research Articles

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HD 231701 is a yellow-white hued star in the northern constellation of Sagitta, near the southern constellation border with Aquila. With an apparent visual magnitude of 8.97, it is too dim to be viewed with the naked eye, but can be seen with powerful binoculars or a small telescope. Parallax measurements provide a distance estimate of approximately 356 light years from the Sun, but it is drifting closer with a radial velocity of −63 km/s. It is predicted to come as close as 189.5 light-years in 1.345 million years.

HD 118203 is a star with an orbiting exoplanet located in the northern circumpolar constellation of Ursa Major. It has the proper name Liesma, which means flame, and it is the name of a character from the Latvian poem Staburags un Liesma. The name was selected in the NameExoWorlds campaign by Latvia, during the 100th anniversary of the IAU.

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HAT-P-12 is a magnitude 13 low-metallicity K dwarf star approximately 463 light years away in the constellation Canes Venatici, which hosts one known exoplanet.

BD−17 63 is a K-type main-sequence star in the southern constellation Cetus. It is a 10th magnitude star at a distance of 113 light-years from Earth. The star is rotating slowly with a negligible level of magnetic activity and an age of over 4 billion years.

<span class="mw-page-title-main">HAT-P-14b</span> Exoplanet in the constellation of Hercules

HAT-P-14b, officially named Sissi also known as WASP-27b, is an extrasolar planet located approximately 224.2 ± 0.6 parsecs (731.2 ± 2.0 ly) away in the constellation of Hercules, orbiting the 10th magnitude F-type main-sequence star HAT-P-14. This planet was discovered in 2010 by the HATNet Project using the transit method. It was independently detected by the SuperWASP project.

<span class="mw-page-title-main">WASP-43b</span> Extrasolar planet in the constellation Sextans

WASP-43b, formally named Astrolábos, is a transiting planet in orbit around the young, active, and low-mass star WASP-43 in the constellation Sextans. The planet is a hot Jupiter with a mass twice that of Jupiter, but with a roughly equal radius. WASP-43b was flagged as a candidate by the SuperWASP program, before they conducted follow-ups using instruments at La Silla Observatory in Chile, which confirmed its existence and provided orbital and physical characteristics. The planet's discovery was published on April 14, 2011.

<span class="mw-page-title-main">WASP-121b</span> Hot Jupiter exoplanet orbiting WASP-121

WASP-121b, formally named Tylos, is an exoplanet orbiting the star WASP-121. WASP-121b is the first exoplanet found to contain water in an extrasolar planetary stratosphere. WASP-121b is in the constellation Puppis, and is about 858 light-years from Earth.

WASP-49 is a binary star system about 636 light-years away in the constellation Lepus. The two stars are separated by 443 AU. The primary is a G-type main-sequence star, with a surface temperature of 5,600 K. WASP-49 is depleted of heavy elements relative to the Sun. It has a metallicity Fe/H index of –0.23, meaning it has 59% the iron level of the Sun.

HAT-P-26 is a K-type main-sequence star located about 466 light-years away in the constellation of Virgo. A survey in 2015 did not find any stellar companions in orbit around it, although a red dwarf companion with a temperature 4000+100
−350
 K
is suspected on wide orbit.

WASP-62, formally named Naledi, is a single star about 573 light-years away. It is an F class main-sequence star, orbited by a planet, WASP-62b. The age of WASP-62 is much younger than the Sun at 0.8±0.6 billion years, and it has a metal abundance similar to the Sun.

WASP-67 is a K-type main-sequence star about 620 light-years away. The stars age is poorly constrained, but is likely older than the Sun`s at approximately 8.7+5.5
−8.6
billion years. WASP-67 is slightly depleted in heavy elements, having 85% of the solar abundance of iron.

WASP-61 is a single F-type main-sequence star about 1560 light-years away. The star is likely younger than the Sun at approximately 3.8+1.8
−0.9
billion years. WASP-61 is depleted in heavy elements, having just 40% of the solar abundance of iron.

WASP-69, also named Wouri, is a K-type main-sequence star 164 light-years away. Its surface temperature is 4782±15 K. WASP-69 is slightly enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.10±0.01, and is much younger than the Sun at 2 billion years. The data regarding starspot activity of WASP-69 are inconclusive, but spot coverage of the photosphere may be very high.

<span class="mw-page-title-main">Gliese 486</span> Star in constellation of Virgo

Gliese 486, also known as Wolf 437 and formally named Gar, is a red dwarf star 26.4 light-years away in the constellation Virgo. It hosts one known exoplanet.

HD 212771, also named Lionrock, is a solitary star in the southern zodiac constellation Aquarius. It has an apparent magnitude of 7.60, making it readily visible with binoculars but not the naked eye. Parallax measurements place the object at a distance of 364 light years, and is currently receding with a radial velocity of 15 km/s.

LHS 3844 is a red dwarf star located 48.5 light-years away from the Solar System in the constellation of Indus. The star has about 15% the mass and 19% the radius of the Sun. It is a relatively inactive red dwarf with a slow rotation period of about 128 days, though UV flares have been observed. LHS 3844 is orbited by one known exoplanet.

CD−34°8618, also known as KELT-13 or WASP-167, is a yellowish-white hued star located in the southern constellation of Centaurus. It has an apparent magnitude of 10.52, making it readily visible in medium sized telescopes, but not to the naked eye. Based on parallax measurements from the Gaia spacecraft, the object is estimated to be approximately 1,350 light years away from the Solar System. It appears to be drifting closer to it, having a radial velocity of −0.53 km/s.

References

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