Key parameters at a glance
- A radius of 11.25 Earth radii
- A mass of 942.00 Earth masses
- Surface gravity around 7.44 g
- An orbital period of 200.452 days
- Semi-major axis 0.9028 AU
- Distance from Earth 818.51 light-years
- Earth Similarity Index 0.447
- Travel time at Voyager 1 speed 14,434,389 years
Context from the literature
This list of exoplanets discovered in 2021 is a list of confirmed exoplanets that were first observed in 2021. For exoplanets detected only by radial velocity, the listed value for mass is a lower limit. See Minimum mass for more information.
Excerpted from Wikipedia · full article
Circumbinary planet
TIC 172900988 b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.
TIC 172900988 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1625of 1771
top 91.7%
This planet
11.25R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | TIC 172900988 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.25 | 11.21 |
| Mass (M⊕) | 1.00 | 942.00 | 317.83 |
| Density (g/cm³) | 5.51 | 3.64 | 1.33 |
| Surface Gravity (g) | 1.00 | 7.44 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 942.000 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 603.874 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 172900988
Gaia DR2
Gaia DR2 709709093301608448
Gaia DR3
Gaia DR3 709709093301608448
System
TIC 172900988
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 200.45 Earth days (54.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.9028 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
40.100 m/s
Transit mid-time (BJD)
2,458,937.5000
Long. of periastron (ω)
159.40°
Angular separation (arcsec)
3.60000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.447
0 = alien, 1 = Earth-identical
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Eclipse timing variations
Timing of a binary eclipse reveals the planet.
Discovery Paper
Primary reference
Kostov et al. 2021Instrument
TESS CCD Array
Publication
2021-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Transiting Exoplanet Survey Satellite (TESS) (12 shown).
Host System: TIC 172900988 Aa
Spectral Class
F-type yellow-white
Effective Temperature
6,050 K — hotter than the Sun (5,778 K)
Estimated Age
3.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.384 R☉
Stellar Mass
1.238 M☉
Metallicity [Fe/H]
0.34
Extended Stellar Properties
Surface gravity (log g)
4.249 dex
Stellar density
0.184 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.957 mas
Total Proper Motion
23.864 mas/yr
PM Right Ascension
-6.58 mas/yr
PM Declination
-22.94 mas/yr
Galactic Cartesian (pc)
x = -0.532 · y = 0.665 · z = 0.523
Equatorial (J2000)
RA 128.66166° · Dec 31.55398°
Galactic ℓ, b
191.795° · 34.661°
Ecliptic λ, β
123.031° · 12.441°
HTM-20 index
185360505
Similar Worlds
KOI-351 h
Gas Giant · F-type yellow-white
Radius 11.25 R⊕ · 2,766.6 ly
KOI-94 d
Gas Giant · F-type yellow-white
Radius 11.27 R⊕ · 1,555.9 ly
K2-290 c
Gas Giant · F-type yellow-white
Radius 11.28 R⊕ · 890.1 ly
K2-232 b
Gas Giant · F-type yellow-white
Radius 11.21 R⊕ · 426.4 ly
TOI-4406 b
Gas Giant · F-type yellow-white
Radius 11.21 R⊕ · 854.0 ly
HD 114082 b
Gas Giant · F-type yellow-white
Radius 11.21 R⊕ · 311.1 ly