Key parameters at a glance

A radius of 13.00 Earth radii
A mass of 1,271.30 Earth masses
Surface gravity around 7.52 g
An orbital period of 872.200 days
Semi-major axis 1.7520 AU
Distance from Earth 1,134.53 light-years
Earth Similarity Index 0.416
Travel time at Voyager 1 speed 20,007,500 years

1 sibling around HAT-P-44

HAT-P-44 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-44 b	Gas Giant	13.92	111.87	4.301	1,108	2014
HAT-P-44 c this	Gas Giant	13.00	1,271.30	872.200	—	2014

HAT-P-44 c Planet Profile

Physical Specs

Radius

13.00 R⊕

Radius (Jupiter)

1.160 R♃

Mass

1,271.30 M⊕

Mass (Jupiter)

4.000 M♃

Density

3.18 g/cm³

Surface Gravity

7.52 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.416

HZ Position Unknown

Controversial No

Discovery

Year 2014

Method Radial Velocity

Facility W. M. Keck Observatory

Telescope 10 m Keck I Telescope

Size rank in cohort

Rank by radius

#960of 1771

top 54.2%

This planet

13.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HIP 14810 b 13.00 R⊕ HD 47186 c 13.00 R⊕ WASP-107 c 13.00 R⊕

Metric	Earth	HAT-P-44 c	Jupiter
Radius (R⊕)	1.00	13.00	11.21
Mass (M⊕)	1.00	1,271.30	317.83
Density (g/cm³)	5.51	3.18	1.33
Surface Gravity (g)	1.00	7.52	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,271.300 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 168699373

Gaia DR2

Gaia DR2 1506159170017461888

Gaia DR3

Gaia DR3 1506159170017461888

System

HAT-P-44

Percentile among Gas Giant cohort

Radius 13.000 R⊕ · percentile 43 / cohort 1771

Mass 1,271.300 M⊕ · percentile 71 / cohort 1747

Orbital period 872.20 d · percentile 75 / cohort 1533

Distance 347.85 pc · percentile 65 / cohort 1759

ESI 0.416 · percentile 90 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

872.200 days

Semi-major axis

1.7520 AU

Eccentricity

0.494

Inclination

— °

Year Length

A year here lasts about 2.39 Earth years on a highly eccentric trajectory at a mean orbital distance of 1.7520 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.416

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Hartman et al. 2014

Instrument

HIRES Spectrometer

Publication

2014-06

Observation locale

Ground

Discovery cohort

Planets confirmed in 2014 at W. M. Keck Observatory (11 shown).

Kepler-94 c · Gas Giant HD 4203 c · Gas Giant Kepler-48 e · Gas Giant Kepler-407 c · Gas Giant HD 10442 b · Gas Giant HD 5319 c · Gas Giant GJ 849 c · Gas Giant HD 75784 b · Gas Giant Kepler-25 d · Gas Giant Kepler-93 c · Unclassified Kepler-97 c · Unclassified

Host System: HAT-P-44

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,295 K — cooler than the Sun (5,778 K)

Estimated Age

7.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.949 R☉

Stellar Mass

0.942 M☉

Metallicity [Fe/H]

0.33

Extended Stellar Properties

Surface gravity (log g)

4.460 dex

Stellar density

1.100 g/cm³

Systemic radial velocity

-33.45 km/s

Rotational v·sin i

0.20 km/s

Metallicity ratio

[Fe/H]

Distance

347.85 parsec

Light-years 1,134.53 ly

V-band magnitude

13.23 mag

Voyager-speed travel 20,007,500 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.846 mas

Total Proper Motion

31.681 mas/yr

PM Right Ascension

-29.68 mas/yr

PM Declination

11.08 mas/yr

Galactic Cartesian (pc)

x = -0.571 · y = -0.373 · z = 0.732

Equatorial (J2000)

RA 213.14386° · Dec 47.01478°

Galactic ℓ, b

89.603° · 64.520°

Ecliptic λ, β

185.104° · 55.029°

HTM-20 index

1613212822