Key parameters at a glance
- A radius of 10.12 Earth radii
- A mass of 63.90 Earth masses
- Surface gravity around 0.62 g
- An orbital period of 3.915 days
- Semi-major axis 0.0510 AU
- Equilibrium temperature 1,393 K (1120 °C)
- Distance from Earth 1,084.95 light-years
- Earth Similarity Index 0.090
- Travel time at Voyager 1 speed 19,133,117 years
1 sibling around TOI-1294
TOI-1294 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| TOI-1294 b this | Gas Giant | 10.12 | 63.90 | 3.915 | 1,393 | 2024 |
| TOI-1294 c | Gas Giant | 14.30 | 147.00 | 159.900 | — | 2024 |
TOI-1294 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1757of 1771
top 99.2%
This planet
10.12R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TOI-1294 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 10.12 | 11.21 |
| Mass (M⊕) | 1.00 | 63.90 | 317.83 |
| Density (g/cm³) | 5.51 | 0.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.62 | 2.53 |
| Insolation (S⊕) | 1.00 | 311.50 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 63.900 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 219015370
Gaia DR2
Gaia DR2 1695343683312903168
Gaia DR3
Gaia DR3 1695343683312903168
System
TOI-1294
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 3.92 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0510 AU.
Transit Fingerprint
Depth
0.335 %
Duration
3.033 h
Impact parameter b
0.860
Rp / R★
0.059627
Transit midpoint (BJD)
2,459,393.0071
Photometric dip
Transit produces a flux drop of 3,350 ppm lasting ≈ 3.03 h.
Extended Orbital Architecture
Planet / star radius ratio
0.059627
Impact parameter (b)
0.860
RV semi-amplitude (K)
23.400 m/s
Transit mid-time (BJD)
2,459,393.0071
Long. of periastron (ω)
90.00°
Angular separation (arcsec)
0.15300
Eq. Temperature
1,393K
(1120 °C)
Insolation (S⊕)
311.50
Earth = 1.00
Earth Similarity (ESI)
0.090
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Polanski et al. 2024Instrument
TESS CCD Array
Publication
2024-06
Observation locale
Space
Discovery cohort
Planets confirmed in 2024 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TOI-1294
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,718 K — cooler than the Sun (5,778 K)
Estimated Age
6.20 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.557 R☉
Stellar Mass
1.158 M☉
Metallicity [Fe/H]
0.28
Extended Stellar Properties
Surface gravity (log g)
4.119 dex
Stellar density
0.432 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.977 mas
Total Proper Motion
19.240 mas/yr
PM Right Ascension
-19.07 mas/yr
PM Declination
-2.56 mas/yr
Galactic Cartesian (pc)
x = -0.244 · y = -0.228 · z = 0.943
Equatorial (J2000)
RA 223.09264° · Dec 70.47656°
Galactic ℓ, b
109.547° · 43.373°
Ecliptic λ, β
145.863° · 72.853°
HTM-20 index
-160526013
Similar Worlds
HATS-46 b
Gas Giant · G-type yellow (Sun-like)
Radius 10.12 R⊕ · 1,480.1 ly
HAT-P-61 b
Gas Giant · G-type yellow (Sun-like)
Radius 10.08 R⊕ · 1,105.1 ly
HATS-5 b
Gas Giant · G-type yellow (Sun-like)
Radius 10.22 R⊕ · 803.6 ly
Kepler-816 b
Gas Giant · G-type yellow (Sun-like)
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TOI-5398 b
Gas Giant · G-type yellow (Sun-like)
Radius 10.30 R⊕ · 426.8 ly
TOI-1386 c
Gas Giant · G-type yellow (Sun-like)
Radius 10.30 R⊕ · 479.0 ly