Key parameters at a glance

A radius of 13.40 Earth radii
A mass of 622.95 Earth masses
Surface gravity around 3.47 g
An orbital period of 133.600 days
Semi-major axis 0.5400 AU
Distance from Earth 594.23 light-years
Earth Similarity Index 0.364
Travel time at Voyager 1 speed 10,479,248 years

HD 12648 b Planet Profile

Physical Specs

Radius

13.40 R⊕

Radius (Jupiter)

1.200 R♃

Mass

622.95 M⊕

Mass (Jupiter)

1.960 M♃

Density

1.42 g/cm³

Surface Gravity

3.47 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.364

HZ Position Unknown

Controversial No

Discovery

Year 2015

Method Radial Velocity

Facility Bohyunsan Optical Astronomical Observatory

Telescope 1.8 m Telescope

Size rank in cohort

Rank by radius

#730of 1771

top 41.2%

This planet

13.40R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 114783 c 13.40 R⊕ HIP 79431 b 13.40 R⊕ HD 68988 b 13.40 R⊕

Metric	Earth	HD 12648 b	Jupiter
Radius (R⊕)	1.00	13.40	11.21
Mass (M⊕)	1.00	622.95	317.83
Density (g/cm³)	5.51	1.42	1.33
Surface Gravity (g)	1.00	3.47	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	622.947 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 12648

HIP

HIP 10800

TIC

TIC 397288169

Gaia DR2

Gaia DR2 574577774218025600

Gaia DR3

Gaia DR3 574577774218025600

System

HD 12648

Percentile among Gas Giant cohort

Radius 13.400 R⊕ · percentile 56 / cohort 1771

Mass 622.947 M⊕ · percentile 54 / cohort 1747

Orbital period 133.60 d · percentile 55 / cohort 1533

Distance 182.19 pc · percentile 48 / cohort 1759

ESI 0.364 · percentile 75 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

133.600 days

Semi-major axis

0.5400 AU

Eccentricity

0.040

Inclination

— °

Year Length

A year here lasts approximately 133.60 Earth days (36.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.5400 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.364

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Lee et al. 2015

Instrument

BOES Echelle Spectrograph

Publication

2015-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2015 at Bohyunsan Optical Astronomical Observatory (3 shown).

HD 11755 b · Gas Giant 8 UMi b · Gas Giant HD 24064 b · Gas Giant

Host System: HD 12648

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

4,835 K — cooler than the Sun (5,778 K)

Estimated Age

4.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

11.020 R☉

Stellar Mass

0.670 M☉

Metallicity [Fe/H]

-0.57

Extended Stellar Properties

Surface gravity (log g)

2.180 dex

Systemic radial velocity

-12.30 km/s

Rotational v·sin i

4.80 km/s

Metallicity ratio

[Fe/H]

Distance

182.19 parsec

Light-years 594.23 ly

V-band magnitude

6.99 mag

Voyager-speed travel 10,479,248 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

5.460 mas

Total Proper Motion

87.331 mas/yr

PM Right Ascension

-9.67 mas/yr

PM Declination

86.79 mas/yr

Galactic Cartesian (pc)

x = 0.061 · y = 0.042 · z = 0.997

Equatorial (J2000)

RA 34.74807° · Dec 85.73653°

Galactic ℓ, b

124.659° · 23.162°

Ecliptic λ, β

82.013° · 63.908°

HTM-20 index

-1588745897