Key parameters at a glance

A radius of 12.60 Earth radii
A mass of 2,597.93 Earth masses
Surface gravity around 16.36 g
An orbital period of 1,270.552 days
Semi-major axis 2.4380 AU
Distance from Earth 126.10 light-years
Earth Similarity Index 0.411
Travel time at Voyager 1 speed 2,223,746 years

HD 7449 b Planet Profile

Physical Specs

Radius

12.60 R⊕

Radius (Jupiter)

1.120 R♃

Mass

2,597.93 M⊕

Mass (Jupiter)

8.174 M♃

Density

7.14 g/cm³

Surface Gravity

16.36 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.411

HZ Position Unknown

Controversial No

Discovery

Year 2011

Method Radial Velocity

Facility La Silla Observatory

Telescope 3.6 m ESO 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 7449 b	Jupiter
Radius (R⊕)	1.00	12.60	11.21
Mass (M⊕)	1.00	2,597.93	317.83
Density (g/cm³)	5.51	7.14	1.33
Surface Gravity (g)	1.00	16.36	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2,597.929 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	161.458 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 7449

HIP

HIP 5806

TIC

TIC 248381971

Gaia DR2

Gaia DR2 2482820714353923072

Gaia DR3

Gaia DR3 2482820714353923072

System

HD 7449

Percentile among Gas Giant cohort

Radius 12.600 R⊕ · percentile 31 / cohort 1771

Mass 2,597.929 M⊕ · percentile 84 / cohort 1747

Orbital period 1,270.55 d · percentile 80 / cohort 1533

Distance 38.66 pc · percentile 13 / cohort 1759

ESI 0.411 · percentile 88 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,270.552 days

Semi-major axis

2.4380 AU

Eccentricity

0.752

Inclination

171.63 °

Year Length

A year here lasts about 3.48 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.4380 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.411

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Dumusque et al. 2011

Instrument

HARPS Spectrograph

Publication

2011-11

Observation locale

Ground

Discovery cohort

Planets confirmed in 2011 at La Silla Observatory (10 shown).

GJ 433 b · Sub-Neptune HD 20794 d · Sub-Neptune HD 192310 b · Neptune-like HD 20794 b · Super-Earth HD 192310 c · Neptune-like HD 217786 b · Gas Giant HIP 5158 c · Gas Giant HD 137388 b · Neptune-like HD 204941 b · Gas Giant HD 7199 b · Unclassified

Host System: HD 7449

Spectral Class

F-type yellow-white

Effective Temperature

6,024 K — hotter than the Sun (5,778 K)

Estimated Age

2.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.970 R☉

Stellar Mass

1.196 M☉

Metallicity [Fe/H]

-0.11

Extended Stellar Properties

Surface gravity (log g)

4.520 dex

Stellar density

1.450 g/cm³

Systemic radial velocity

-19.85 km/s

Rotational v·sin i

3.00 km/s

Metallicity ratio

[M/H]

Distance

38.66 parsec

Light-years 126.10 ly

V-band magnitude

7.50 mag

Voyager-speed travel 2,223,746 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

25.836 mas

Total Proper Motion

212.395 mas/yr

PM Right Ascension

-164.48 mas/yr

PM Declination

-134.38 mas/yr

Galactic Cartesian (pc)

x = 0.944 · y = 0.318 · z = -0.088

Equatorial (J2000)

RA 18.62147° · Dec -5.04797°

Galactic ℓ, b

137.917° · -67.247°

Ecliptic λ, β

15.216° · -11.961°

HTM-20 index

1963152430