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WASP 19
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Star WASP 19

Binary star WASP 19 is located 869 light years away from the Sun. It consists of a yellow star and a red dwarf. There is at least one exoplanet in this system.
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Sun distance
869 light years
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WASP 19 A

Yellow star
Spectral class: G8V

Location +

Ascension iconRight ascension: 9h 53m 40.029s
Declination iconDeclination: -45° 39' 32.779'' (southern hemisphere)
Parallax iconParallax: 3.752
Distance iconSun distance: 869.375 ly | 266.6 pc
Star position
The position of a star tells us where it appears in the sky, similar to how we use coordinates like latitude and longitude on Earth. In astronomy, the three main coordinates are right ascension, declination and distance. .. icon More about Star position in StellarGuide

Basic characteristic

icon weight
Mass: 90.4 % M Sun
| 947 M Jupiter
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Star mass
Mass of the star WASP 19 A is 0.904 solar masses.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 100 % R Sun
| 10 R Jupiter
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Star size
Radius of the star WASP 19 A is 1.004 solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature icon
Temperature: 5568 K | 0.96 T Sun
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Star temperature
Surface temperature of WASP 19 A is 5568 K, which is 96 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide
time icon
Age: 6.4 billions years | 1.39 Sun
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Star age
Star WASP 19 A is 6.4 billion years old, which is about 1.39 of the Sun's age.

The age of a star tells us how long it has been shining since it formed. Knowing a star’s age helps astronomers understand its life stage, how it has changed over time, and what will happen to it in the future... icon More about Star age in StellarGuide

Photometry

Magnitude iconApparent magnitude (V): 12.3
Magnitude iconAbsolute magnitude (V): 5.1
Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3

WASP 19 B

Red dwarf

Location +

Distance iconDistance from the primary: 19976 AU

Basic characteristic

icon weight
Mass: 10 % M Sun
| 104.8 M Jupiter
 (estimate)
+
Star mass
The mass of the star WASP 19 B is unknown. Based on its other characteristics, it is estimated to be about 10 % of the Sun's mass.

The mass of a star is the total amount of matter it contains. It is one of the most important properties of a star, as it determines almost everything about how the star lives, changes, and dies. In astronomy, star mass is usually measured in solar masses (M☉) — where 1 solar mass is equal to the mass of our Sun... icon More about Star mass in StellarGuide
radius icon
Size: 20 % R Sun
| 1.5 R Jupiter
(estimate)
+
Star size
Radius of the star WASP 19 B is not known. Its estimated value based on other similar stars is about 20 % solar radii.

The size of a star refers to its radius — the distance from its center to its surface. Star size is usually measured in solar radii (R☉), where 1 solar radius equals approximately 696,000 kilometers. Depending on their type and life stage, stars can be much smaller or larger than the Sun... icon More about Star size in StellarGuide
temperature iconTemperature: 2900 K
 (estimate)
+
Star temperature
Surface temperature of WASP 19 B is estimated to be 2917 K, which is 50 % of the temperature on the surface of the Sun.

The temperature of a star refers to the temperature at its surface, also called the photosphere. It is measured in kelvins (K), the standard unit for temperature in astronomy. A star’s temperature tells us a lot about its physical properties and where it stands in its evolutionary stage... icon More about Star temperature in StellarGuide

Photometry

Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).
5
10
15
20
25
30
35
K
2.1
H
1.6
J
1.2
Grp
0.8
I
0.8
G
0.6
V
0.5
Gbp
0.5
B
0.4
U
0.3
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WASP 19 system structure

 WASP 19 A
WASP 19 A b n/a 362.1 M⊕ 15.8 R⊕ 0 days
WASP 19 B 19976 AU

More about WASP 19

       WASP 19 can be found in southern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.
Other designations of this star
TOI-655, 2MASS J09534008-4539330, , Gaia DR3 5411736896952029568
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External sources
icon study
icon study
icon study
icon study
gaia icon
Gaia database (Gaia DR3 5411725145916602496)
Archive from the Gaia mission

Frequently Asked Questions

How far is the WASP 19 system from the Sun?

The WASP 19 system is 869 light years or 266.6 parsecs from the Sun.

What galaxy is the WASP 19 star in?

The WASP 19 is in the Milky Way galaxy just like the Sun.

How many stars are in the WASP 19 system?

The WASP 19 system contains 2 stars.

What type of star is the WASP 19?

The primary in the WASP 19 system is a Yellow star star.

What temperature is star WASP 19?

The primary in the WASP 19 system has a temperature of 5568 K. Find out more about the temperature of stars in Stellar guide
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