Confirmed Exoplanet Discovered 2022

GJ 896 A b

A gas giant orbiting the m-type red dwarf GJ 896 A, located approximately 20.4 light-years from Earth.

Key parameters at a glance

  • A radius of 13.30 Earth radii
  • A mass of 718.29 Earth masses
  • Surface gravity around 4.06 g
  • An orbital period of 284.390 days
  • Semi-major axis 0.6397 AU
  • Distance from Earth 20.42 light-years
  • Earth Similarity Index 0.376
  • Travel time at Voyager 1 speed 360,073 years

GJ 896 A b Planet Profile

Physical Specs

Radius
13.30 R⊕
Radius (Jupiter)
1.190 R♃
Mass
718.29 M⊕
Mass (Jupiter)
2.260 M♃
Density
1.68 g/cm³
Surface Gravity
4.06 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.376
HZ Position Unknown
Controversial No

Discovery

Year 2022
Method Astrometry
Facility Very Long Baseline Array
Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#793of 1771

top 44.7%

This planet

13.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 b 13.30 R⊕ HD 129445 b 13.30 R⊕ GJ 876 b 13.30 R⊕
Metric Earth GJ 896 A b Jupiter
Radius (R⊕)1.0013.3011.21
Mass (M⊕)1.00718.29317.83
Density (g/cm³)5.511.681.33
Surface Gravity (g)1.004.062.53
Insolation (S⊕)1.00—0.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 718.292 M⊕ Direct mass measurement (not derived).

Star Catalogue Identifiers

HIP

HIP 116132 A

TIC

TIC 247985094

Gaia DR2

Gaia DR2 2824770686019003904

Gaia DR3

Gaia DR3 2824770686019003904

System

GJ 896

Percentile among Gas Giant cohort

Radius 13.300 R⊕ · percentile 53 / cohort 1771
Mass 718.292 M⊕ · percentile 58 / cohort 1747
Orbital period 284.39 d · percentile 60 / cohort 1533
Distance 6.26 pc · percentile 0 / cohort 1759
ESI 0.376 · percentile 78 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
284.390 days
Semi-major axis
0.6397 AU
Eccentricity
0.350
Inclination
69.20 °

Year Length

A year here lasts approximately 284.39 Earth days (77.9% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.6397 AU.

Eq. Temperature

—

 

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.376

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Curiel et al. 2022

Instrument

Multiple Instruments

Publication

2022-09

Observation locale

Ground

Host System: GJ 896 A

Spectral Class

M-type red dwarf

Effective Temperature

3,345 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.395 R☉

Stellar Mass

0.436 M☉

Metallicity [Fe/H]

—

Distance
6.26 parsec
Light-years 20.42 ly
V-band magnitude
10.05 mag
Voyager-speed travel 360,073 yr

Multi-band Host Photometry — 13 bands

5.315.015.05U11.85B10.05V9.04Gaia7.79TESS12.71Sloan g11.57Sloan r11.39Sloan i7.76Sloan z7.42Ic6.16J5.58H5.33K

Astrometric Data

Parallax

159.710 mas

Total Proper Motion

580.676 mas/yr

PM Right Ascension

577.61 mas/yr

PM Declination

-59.64 mas/yr

Galactic Cartesian (pc)

x = 0.933 · y = -0.115 · z = 0.341

Equatorial (J2000)

RA 352.97004° · Dec 19.93700°

Galactic ℓ, b

98.579° · -39.143°

Ecliptic λ, β

1.843° · 21.015°

HTM-20 index

-1051842194

Similar Worlds

GJ 876 b

Gas Giant · M-type red dwarf

Radius 13.30 R⊕ · 15.2 ly

GJ 317 b

Gas Giant · M-type red dwarf

Radius 13.30 R⊕ · 49.6 ly

GJ 328 b

Gas Giant · M-type red dwarf

Radius 13.30 R⊕ · 66.9 ly

TIC 46432937 b

Gas Giant · M-type red dwarf

Radius 13.32 R⊕ · 295.3 ly

HIP 79431 b

Gas Giant · M-type red dwarf

Radius 13.40 R⊕ · 47.4 ly

HIP 12961 b

Gas Giant · M-type red dwarf

Radius 13.20 R⊕ · 76.2 ly

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