Key parameters at a glance

A radius of 13.20 Earth radii
A mass of 819.97 Earth masses
Surface gravity around 4.71 g
An orbital period of 1,333.000 days
Semi-major axis 2.3700 AU
Distance from Earth 111.44 light-years
Earth Similarity Index 0.387
Travel time at Voyager 1 speed 1,965,331 years

HD 196885 A b Planet Profile

Physical Specs

Radius

13.20 R⊕

Radius (Jupiter)

1.180 R♃

Mass

819.97 M⊕

Mass (Jupiter)

2.580 M♃

Density

1.96 g/cm³

Surface Gravity

4.71 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.387

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Radial Velocity

Facility Haute-Provence Observatory

Telescope 1.93 m Telescope

Size rank in cohort

Rank by radius

#847of 1771

top 47.8%

This planet

13.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HD 12661 c 13.20 R⊕ HD 37605 b 13.20 R⊕ MOA-2009-BLG-387L b 13.20 R⊕

Metric	Earth	HD 196885 A b	Jupiter
Radius (R⊕)	1.00	13.20	11.21
Mass (M⊕)	1.00	819.97	317.83
Density (g/cm³)	5.51	1.96	1.33
Surface Gravity (g)	1.00	4.71	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	819.970 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

HD 196885 A

HIP

HIP 101966

TIC

TIC 282257777

Gaia DR2

Gaia DR2 1754430373040023168

Gaia DR3

Gaia DR3 1754430373040023168

System

HD 196885

Percentile among Gas Giant cohort

Radius 13.200 R⊕ · percentile 49 / cohort 1771

Mass 819.970 M⊕ · percentile 62 / cohort 1747

Orbital period 1,333.00 d · percentile 81 / cohort 1533

Distance 34.17 pc · percentile 10 / cohort 1759

ESI 0.387 · percentile 82 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,333.000 days

Semi-major axis

2.3700 AU

Eccentricity

0.480

Inclination

— °

Year Length

A year here lasts about 3.65 Earth years on a highly eccentric trajectory at a mean orbital distance of 2.3700 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.387

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Correia et al. 2008

Instrument

ELODIE Spectrograph

Publication

2008-02

Observation locale

Ground

Discovery cohort

Planets confirmed in 2007 at Haute-Provence Observatory (2 shown).

HD 132406 b · Gas Giant HD 43691 b · Gas Giant

Host System: HD 196885 A

Spectral Class

F-type yellow-white

Effective Temperature

6,254 K — hotter than the Sun (5,778 K)

Estimated Age

3.12 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.310 R☉

Stellar Mass

1.280 M☉

Metallicity [Fe/H]

0.22

Extended Stellar Properties

Surface gravity (log g)

4.310 dex

Stellar density

0.568 g/cm³

Systemic radial velocity

-31.67 km/s

Rotational v·sin i

7.80 km/s

Activity index (log R'HK)

-5.010

Metallicity ratio

[Fe/H]

Distance

34.17 parsec

Light-years 111.44 ly

V-band magnitude

6.40 mag

Voyager-speed travel 1,965,331 yr

Multi-band Host Photometry — 11 bands

Astrometric Data

Parallax

29.237 mas

Total Proper Motion

114.274 mas/yr

PM Right Ascension

71.47 mas/yr

PM Declination

89.17 mas/yr

Galactic Cartesian (pc)

x = 0.630 · y = -0.752 · z = 0.195

Equatorial (J2000)

RA 309.96646° · Dec 11.25002°

Galactic ℓ, b

56.310° · -17.985°

Ecliptic λ, β

315.823° · 28.555°

HTM-20 index

-697582236

Observation Record

Photometric series

RV measurements

Archive notes