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V1298 Tauri
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Star V1298 Tauri

V1298 Tauri is a young star approximately 352 light-years away from the Sun. It has an estimated age of only 23 million years, placing it in an early stage of stellar development. The star possesses a mass of approximately 1.1 times that of the Sun and a radius of 1.34 solar radii, with a surface temperature of 4962 K.
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Sun distance
352 light years
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V1298 Tauri A

T Tauri star
Spectral class: K0-K1.5

Location +

Ascension iconRight ascension: 4h 5m 19.600s
Declination iconDeclination: 20° 9' 25.306'' (northern hemisphere)
Parallax iconParallax: 9.258
Distance iconSun distance: 352.308 ly | 108.0 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: 110 % M Sun
| 1152 M Jupiter
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Star mass
Mass of the star V1298 Tauri A is 1.1 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: 134 % R Sun
| 13.3 R Jupiter
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Star size
Radius of the star V1298 Tauri A is 1.34 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: 4962 K | 0.86 T Sun
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Star temperature
Surface temperature of V1298 Tauri A is 4962 K, which is 86 % 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: 0.023 billions years | 0.01 Sun
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Star age
Star V1298 Tauri A is 0.023 billion years old, which is about 0.01 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
luminosity icon
Luminosity: 0.934 L Sun
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Star luminosity
Luminosity is the total amount of energy a star gives off every second. Think of it as the star’s true brightness — not just how bright it looks from Earth. This is important because some stars may appear dim simply because they are far away, not because they’re actually faint... icon More about Star luminosity in StellarGuide

Photometry

Magnitude iconApparent magnitude (V): 10.1
Magnitude iconAbsolute magnitude (V): 4.9
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

V1298 Tauri B

Orange star

Location +

Distance iconDistance from the primary: 14,795 AU

Basic characteristic

temperature iconTemperature: 5000 K
 (estimate)
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Star temperature
Surface temperature of V1298 Tauri B is estimated to be 4962 K, which is 87 % 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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V1298 Tauri system structure

 V1298 Tauri A
V1298 Tauri A c 0.08 AU 4.7 M⊕ 4.9 R⊕ 8.2 days
V1298 Tauri A d 0.11 AU 6 M⊕ 7.3 R⊕ 12.4 days
V1298 Tauri A b 0.17 AU 13.1 M⊕ 10 R⊕ 24.1 days
V1298 Tauri A e 0.27 AU 15.3 M⊕ 11.2 R⊕ 46.8 days
V1298 Tauri B 14,795 AU

More about V1298 Tauri

       V1298 Tauri can be found in northern celestial hemisphere, you cannot see it with naked eye, but you can observe this star with basic telescope. The star is easily observable from Northern America, Europe and Asia.
Other designations of this star
V 1298 Tau, K2-309, 2MASS J04051959+2009256, BD+19 656, EPIC 210818897, RX J0405.3+2009, 1SWASP J040519.59+200925.5, Gaia DR3 51886335968692480
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External sources
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Spot Modeling through Multiband Photometry Analysis of V1298 Tau
Scientific study, Accepted: 17. 09. 2024
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News from this star system

Mass measurements of infant planets orbiting the young star V1298 Tau
icon26. 9. 2026
Image: Mass measurements of infant planets orbiting the young star V1298 Tau
New mass measurements of the infant planets orbiting V1298 Tau reveal that planets b and e are likely gas giants. These findings, based on long-term radial velocity monitoring, suggest higher masses than previously estimated from transit timing observations....
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Stellar flares explain missing methane in the atmosphere of exoplanet V1298 Tauri b
icon31. 8. 2026
Image: Stellar flares explain missing methane in the atmosphere of exoplanet V1298 Tauri b
Observations of exoplanet V1298 Tauri b reveal a missing methane mystery. Instead of internal heat, frequent stellar flares from its young host star are likely breaking down methane, creating an atmosphere rich in carbon dioxide and carbon monoxide....
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CHEOPS observations reveal planetary densities and atmospheric evolution in V1298 Tau system
icon5. 7. 2026
Image: CHEOPS observations reveal planetary densities and atmospheric evolution in V1298 Tau system
CHEOPS observations of the young V1298 Tau system provide refined measurements of its innermost planets. The findings reveal distinct bulk densities, suggesting diverse atmospheric evolution for these young worlds. No past dynamical excitation is required....
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Frequently Asked Questions

How far is the V1298 Tauri system from the Sun?

The V1298 Tauri system is 352 light years or 108.0 parsecs from the Sun.

What galaxy is the V1298 Tauri star in?

The V1298 Tauri is in the Milky Way galaxy just like the Sun.

How many stars are in the V1298 Tauri system?

The V1298 Tauri system contains 2 stars.

What type of star is the V1298 Tauri?

The primary in the V1298 Tauri system is a T Tauri star star.

What temperature is star V1298 Tauri?

The primary in the V1298 Tauri system has a temperature of 4962 K. Find out more about the temperature of stars in Stellar guide
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