Key parameters at a glance

A radius of 13.10 Earth radii
A mass of 1,017.06 Earth masses
Surface gravity around 5.93 g
An orbital period of 1,170.000 days
Semi-major axis 1.7000 AU
Distance from Earth 3,900.76 light-years
Earth Similarity Index 0.402
Travel time at Voyager 1 speed 68,789,908 years

V0391 Peg b Planet Profile

Physical Specs

Radius

13.10 R⊕

Radius (Jupiter)

1.170 R♃

Mass

1,017.06 M⊕

Mass (Jupiter)

3.200 M♃

Density

2.49 g/cm³

Surface Gravity

5.93 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.402

HZ Position Unknown

Controversial No

Discovery

Year 2007

Method Pulsation Timing Variations

Facility Multiple Observatories

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#910of 1771

top 51.3%

This planet

13.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

GJ 3021 b 13.10 R⊕ HD 221287 b 13.10 R⊕ HD 37605 c 13.10 R⊕

Metric	Earth	V0391 Peg b	Jupiter
Radius (R⊕)	1.00	13.10	11.21
Mass (M⊕)	1.00	1,017.06	317.83
Density (g/cm³)	5.51	2.49	1.33
Surface Gravity (g)	1.00	5.93	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	1,017.056 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 397595169

Gaia DR2

Gaia DR2 1891930796082743680

Gaia DR3

Gaia DR3 1891930796082743680

System

V0391 Peg

Percentile among Gas Giant cohort

Radius 13.100 R⊕ · percentile 46 / cohort 1771

Mass 1,017.056 M⊕ · percentile 67 / cohort 1747

Orbital period 1,170.00 d · percentile 79 / cohort 1533

Distance 1,195.98 pc · percentile 88 / cohort 1759

ESI 0.402 · percentile 86 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1,170.000 days

Semi-major axis

1.7000 AU

Eccentricity

0.000

Inclination

— °

Year Length

A year here lasts about 3.20 Earth years on a nearly circular orbit at a mean orbital distance of 1.7000 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.402

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Silvotti et al. 2007

Instrument

Multiple Instruments

Publication

2007-09

Observation locale

Ground

Discovery cohort

Planets confirmed in 2007 at Multiple Observatories (2 shown).

Lupus-TR-3 b · Neptune-like 55 Cnc f · Neptune-like

Host System: V0391 Peg

Spectral Class

B-type blue-white

Effective Temperature

29,300 K — hotter than the Sun (5,778 K)

Estimated Age

10.00 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.230 R☉

Stellar Mass

0.500 M☉

Metallicity [Fe/H]

—

Extended Stellar Properties

Surface gravity (log g)

5.400 dex

Stellar density

80.391 g/cm³

Rotational v·sin i

0.10 km/s

Distance

1,195.98 parsec

Light-years 3,900.76 ly

V-band magnitude

14.77 mag

Voyager-speed travel 68,789,908 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.807 mas

Total Proper Motion

6.138 mas/yr

PM Right Ascension

-4.82 mas/yr

PM Declination

-3.80 mas/yr

Galactic Cartesian (pc)

x = 0.784 · y = -0.433 · z = 0.445

Equatorial (J2000)

RA 331.05041° · Dec 26.41882°

Galactic ℓ, b

82.486° · -23.030°

Ecliptic λ, β

344.265° · 35.496°

HTM-20 index

395957914

Similar Worlds

HD 97048 b

Gas Giant · B-type blue-white

Radius 13.30 R⊕ · 599.7 ly

2MASS J19383260+4603591 b

Gas Giant · B-type blue-white

Radius 13.40 R⊕ · 1,292.7 ly

Kepler-451 c

Gas Giant · B-type blue-white

Radius 13.50 R⊕ · 1,292.7 ly

Kepler-451 d

Gas Giant · B-type blue-white

Radius 13.50 R⊕ · 1,292.7 ly

DP Leo b

Gas Giant · B-type blue-white

Radius 12.70 R⊕ · 997.0 ly

ZTF J1230-2655 b

Gas Giant · B-type blue-white

Radius 13.79 R⊕ · 608.9 ly

Explore Related Categories

Gas Giant Planets Multiple Observatories Mission B-type blue-white Hosts