Key parameters at a glance

A radius of 12.30 Earth radii
A mass of 4,538.42 Earth masses
Surface gravity around 30.00 g
An orbital period of 446.270 days
Semi-major axis 1.2580 AU
Equilibrium temperature 340 K (67 °C)
Distance from Earth 804.99 light-years
Earth Similarity Index 0.391
Travel time at Voyager 1 speed 14,195,921 years

1 sibling around HAT-P-13

HAT-P-13 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
HAT-P-13 b	Gas Giant	14.26	270.46	2.916	1,740	2009
HAT-P-13 c this	Gas Giant	12.30	4,538.42	446.270	340	2009

HAT-P-13 c Planet Profile

Physical Specs

Radius

12.30 R⊕

Radius (Jupiter)

1.100 R♃

Mass

4,538.42 M⊕

Mass (Jupiter)

14.280 M♃

Density

13.40 g/cm³

Surface Gravity

30.00 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.391

HZ Position Unknown

Controversial No

Discovery

Year 2009

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#1349of 1771

top 76.1%

This planet

12.30R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

CHXR 73 b 12.30 R⊕ HD 22781 b 12.30 R⊕ HD 11506 d 12.30 R⊕

Metric	Earth	HAT-P-13 c	Jupiter
Radius (R⊕)	1.00	12.30	11.21
Mass (M⊕)	1.00	4,538.42	317.83
Density (g/cm³)	5.51	13.40	1.33
Surface Gravity (g)	1.00	30.00	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	4,538.421 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 20096620

Gaia DR2

Gaia DR2 1014520826353577088

Gaia DR3

Gaia DR3 1014520826353577088

System

HAT-P-13

Percentile among Gas Giant cohort

Radius 12.300 R⊕ · percentile 22 / cohort 1771

Mass 4,538.421 M⊕ · percentile 93 / cohort 1747

Orbital period 446.27 d · percentile 66 / cohort 1533

Distance 246.81 pc · percentile 55 / cohort 1759

ESI 0.391 · percentile 83 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

446.270 days

Semi-major axis

1.2580 AU

Eccentricity

0.662

Inclination

— °

Year Length

A year here lasts about 1.22 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.2580 AU.

Eq. Temperature

340K

(67 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.391

0 = alien, 1 = Earth-identical

Insufficient insolation data — liquid water is physically possible with adequate atmospheric pressure.

Discovery Paper

Primary reference

Bakos et al. 2009

Instrument

HIRES Spectrometer

Publication

2009-12

Observation locale

Ground

Discovery cohort

Planets confirmed in 2009 at W. M. Keck Observatory (12 shown).

HD 13931 b · Gas Giant HD 181342 b · Gas Giant HD 212771 b · Gas Giant HD 136418 b · Gas Giant HIP 79431 b · Gas Giant HD 206610 b · Gas Giant HD 4313 b · Gas Giant HD 180902 b · Gas Giant HD 95089 b · Gas Giant GJ 179 b · Gas Giant HD 34445 b · Gas Giant GJ 649 b · Gas Giant

Host System: HAT-P-13

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,653 K — cooler than the Sun (5,778 K)

Estimated Age

5.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.756 R☉

Stellar Mass

1.320 M☉

Metallicity [Fe/H]

0.46

Extended Stellar Properties

Surface gravity (log g)

4.070 dex

Stellar density

0.344 g/cm³

Systemic radial velocity

14.69 km/s

Rotational v·sin i

1.66 km/s

Metallicity ratio

[Fe/H]

Distance

246.81 parsec

Light-years 804.99 ly

V-band magnitude

10.42 mag

Voyager-speed travel 14,195,921 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

4.023 mas

Total Proper Motion

35.734 mas/yr

PM Right Ascension

-24.14 mas/yr

PM Declination

-26.35 mas/yr

Galactic Cartesian (pc)

x = -0.434 · y = 0.520 · z = 0.736

Equatorial (J2000)

RA 129.88238° · Dec 47.35191°

Galactic ℓ, b

172.498° · 37.542°

Ecliptic λ, β

119.441° · 27.907°

HTM-20 index

-2110719154