Key parameters at a glance

A radius of 12.60 Earth radii
A mass of 2,653.88 Earth masses
Surface gravity around 16.72 g
An orbital period of 256.780 days
Semi-major axis 0.9170 AU
Distance from Earth 126.01 light-years
Earth Similarity Index 0.408
Travel time at Voyager 1 speed 2,222,273 years

HD 89744 b Planet Profile

Physical Specs

Radius

12.60 R⊕

Radius (Jupiter)

1.120 R♃

Mass

2,653.88 M⊕

Mass (Jupiter)

8.350 M♃

Density

7.29 g/cm³

Surface Gravity

16.72 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.408

HZ Position Unknown

Controversial No

Discovery

Year 1999

Method Radial Velocity

Facility Fred Lawrence Whipple Observatory

Telescope 1.5 m Tillinghast Reflector Telescope

Size rank in cohort

Rank by radius

#1179of 1771

top 66.5%

This planet

12.60R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Kepler-419 c 12.60 R⊕ 2MASS J04414489+2301513 b 12.60 R⊕ HD 47536 b 12.60 R⊕

Metric	Earth	HD 89744 b	Jupiter
Radius (R⊕)	1.00	12.60	11.21
Mass (M⊕)	1.00	2,653.88	317.83
Density (g/cm³)	5.51	7.29	1.33
Surface Gravity (g)	1.00	16.72	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	2,653.881 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 89744

HIP

HIP 50786

TIC

TIC 8154501

Gaia DR2

Gaia DR2 804739952015901056

Gaia DR3

Gaia DR3 804739952015901056

System

HD 89744

Percentile among Gas Giant cohort

Radius 12.600 R⊕ · percentile 31 / cohort 1771

Mass 2,653.881 M⊕ · percentile 84 / cohort 1747

Orbital period 256.78 d · percentile 59 / cohort 1533

Distance 38.64 pc · percentile 13 / cohort 1759

ESI 0.408 · percentile 88 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

256.780 days

Semi-major axis

0.9170 AU

Eccentricity

0.677

Inclination

— °

Year Length

A year here lasts approximately 256.78 Earth days (70.3% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.9170 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.408

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Korzennik 2000

Instrument

AFOE Echelle Spectrograph

Publication

2000-04

Observation locale

Ground

Host System: HD 89744

Spectral Class

F-type yellow-white

Effective Temperature

6,291 K — hotter than the Sun (5,778 K)

Estimated Age

1.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.133 R☉

Stellar Mass

1.860 M☉

Metallicity [Fe/H]

0.22

Extended Stellar Properties

Surface gravity (log g)

4.070 dex

Stellar density

0.176 g/cm³

Systemic radial velocity

-5.60 km/s

Rotational v·sin i

9.50 km/s

Activity index (log R'HK)

-4.940

Metallicity ratio

[M/H]

Distance

38.64 parsec

Light-years 126.01 ly

V-band magnitude

5.73 mag

Voyager-speed travel 2,222,273 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

25.854 mas

Total Proper Motion

183.362 mas/yr

PM Right Ascension

-120.57 mas/yr

PM Declination

-138.14 mas/yr

Galactic Cartesian (pc)

x = -0.685 · y = 0.311 · z = 0.659

Equatorial (J2000)

RA 155.54332° · Dec 41.22894°

Galactic ℓ, b

178.391° · 56.393°

Ecliptic λ, β

141.328° · 28.740°

HTM-20 index

-1346793749

Observation Record

Photometric series

RV measurements

Archive notes