Key parameters at a glance

A radius of 12.60 Earth radii
A mass of 2,510.84 Earth masses
Surface gravity around 15.82 g
An orbital period of 15,732.459 days
Semi-major axis 20.0000 AU
Distance from Earth 58.49 light-years
Earth Similarity Index 0.415
Travel time at Voyager 1 speed 1,031,423 years

Context from the literature

14 Herculis c or 14 Her c is the outermost of two known exoplanets orbiting the star 14 Herculis, approximately 58.4 light-years away in the constellation of Hercules. The planet has a mass that would make it a gas giant roughly the same size as Jupiter but much more massive.

Excerpted from Wikipedia · full article

1 sibling around 14 Her

HD 145675 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
14 Her b	Gas Giant	12.50	2,828.67	1,766.410	—	2002
HD 145675 c this	Gas Giant	12.60	2,510.84	15,732.459	—	2021

HD 145675 c Planet Profile

Physical Specs

Radius

12.60 R⊕

Radius (Jupiter)

1.120 R♃

Mass

2,510.84 M⊕

Mass (Jupiter)

7.900 M♃

Density

6.90 g/cm³

Surface Gravity

15.82 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.415

HZ Position Unknown

Controversial No

Discovery

Year 2021

Method Radial Velocity

Facility Multiple Observatories

Telescope Multiple Telescopes

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 145675 c	Jupiter
Radius (R⊕)	1.00	12.60	11.21
Mass (M⊕)	1.00	2,510.84	317.83
Density (g/cm³)	5.51	6.90	1.33
Surface Gravity (g)	1.00	15.82	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2,510.844 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1,843.405 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 145675

HIP

HIP 79248

TIC

TIC 219483057

Gaia DR2

Gaia DR2 1385293808145621504

Gaia DR3

Gaia DR3 1385293808145621504

System

14 Her

Percentile among Gas Giant cohort

Radius 12.600 R⊕ · percentile 31 / cohort 1771

Mass 2,510.844 M⊕ · percentile 83 / cohort 1747

Orbital period 15,732.46 d · percentile 97 / cohort 1533

Distance 17.93 pc · percentile 3 / cohort 1759

ESI 0.415 · percentile 90 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

15,732.459 days

Semi-major axis

20.0000 AU

Eccentricity

0.520

Inclination

116.30 °

Year Length

A year here lasts about 43.07 Earth years on a highly eccentric trajectory at a mean orbital distance of 20.0000 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

36.515 m/s

Transit mid-time (BJD)

2,454,680.0000

Long. of periastron (ω)

172.50°

Angular separation (arcsec)

1,120.00000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.415

0 = alien, 1 = Earth-identical

Detection Signatures

Radial velocity

Stellar wobble has been measured spectroscopically.

Astrometry

Positional wobble of the host star was measured.

Direct imaging

The planet has been imaged directly (rare).

Discovery Paper

Primary reference

Rosenthal et al. 2021

Instrument

Multiple Instruments

Publication

2021-07

Observation locale

Ground

Discovery cohort

Planets confirmed in 2021 at Multiple Observatories (12 shown).

L 98-59 e · Super-Earth GJ 393 b · Rocky Terrestrial HD 168009 b · Sub-Neptune HD 164922 e · Sub-Neptune HD 95735 c · Sub-Neptune HD 141004 b · Sub-Neptune HD 107148 c · Neptune-like TOI-178 f · Sub-Neptune TYC 0434-04538-1 b · Gas Giant HIP 56640 b · Gas Giant HD 137496 c · Gas Giant HD 156668 c · Neptune-like

Host System: 14 Her

Spectral Class

K-type orange

Effective Temperature

5,338 K — cooler than the Sun (5,778 K)

Estimated Age

4.60 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.970 M☉

Metallicity [Fe/H]

0.43

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

1.274 g/cm³

Systemic radial velocity

-13.82 km/s

Rotational v·sin i

1.00 km/s

Activity index (log R'HK)

-5.060

Metallicity ratio

[Fe/H]

Distance

17.93 parsec

Light-years 58.49 ly

V-band magnitude

6.62 mag

Voyager-speed travel 1,031,423 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

55.736 mas

Total Proper Motion

324.530 mas/yr

PM Right Ascension

132.02 mas/yr

PM Declination

-296.46 mas/yr

Galactic Cartesian (pc)

x = -0.332 · y = -0.641 · z = 0.692

Equatorial (J2000)

RA 242.60210° · Dec 43.81636°

Galactic ℓ, b

69.168° · 46.944°

Ecliptic λ, β

223.247° · 62.879°

HTM-20 index

-1209154781

Observation Record

Photometric series

RV measurements

Stellar spectra

Wikipedia → Image: Wikimedia Commons · NASA, ESA, CSA, STScI, William Balmer (JHU), Daniella Bardalez Gagliuffi… · Public domain

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