Key parameters at a glance

A radius of 15.86 Earth radii
A mass of 874.03 Earth masses
Surface gravity around 3.47 g
An orbital period of 0.969 days
Semi-major axis 0.0204 AU
Equilibrium temperature 2,453 K (2180 °C)
Distance from Earth 1,450.04 light-years
Earth Similarity Index 0.049
Travel time at Voyager 1 speed 25,571,523 years

KELT-16 b Planet Profile

Physical Specs

Radius

15.86 R⊕

Radius (Jupiter)

1.415 R♃

Mass

874.03 M⊕

Mass (Jupiter)

2.750 M♃

Density

1.20 g/cm³

Surface Gravity

3.47 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.049

HZ Position Inner

Controversial No

Discovery

Year 2017

Method Transit

Facility KELT

Telescope Mamiya 645 80mm f/1.9

Size rank in cohort

Rank by radius

#171of 1771

top 9.6%

This planet

15.86R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-19 b 15.86 R⊕ Kepler-8 b 15.87 R⊕ HATS-66 b 15.82 R⊕

Metric	Earth	KELT-16 b	Jupiter
Radius (R⊕)	1.00	15.86	11.21
Mass (M⊕)	1.00	874.03	317.83
Density (g/cm³)	5.51	1.20	1.33
Surface Gravity (g)	1.00	3.47	2.53
Insolation (S⊕)	1.00	6,992.03	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	874.033 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	870.854 M⊕	Lower bound from radial-velocity fitting.
Computed mass	875.030 M⊕	Model-computed mass (e.g. from mass-radius relation).

Star Catalogue Identifiers

TIC

TIC 236445129

Gaia DR2

Gaia DR2 1864885215233116032

Gaia DR3

Gaia DR3 1864885215233116032

System

KELT-16

Percentile among Gas Giant cohort

Radius 15.861 R⊕ · percentile 90 / cohort 1771

Mass 874.033 M⊕ · percentile 64 / cohort 1747

Orbital period 0.97 d · percentile 1 / cohort 1533

Distance 444.59 pc · percentile 72 / cohort 1759

ESI 0.049 · percentile 4 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

0.969 days

Semi-major axis

0.0204 AU

Eccentricity

0.000

Inclination

84.40 °

Year Length

A year here lasts roughly 23.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0204 AU.

Transit Fingerprint

Depth

1.146 %

Duration

2.489 h

Impact parameter b

0.320

Rp / R★

0.107000

Transit midpoint (BJD)

2,457,247.2479

Photometric dip

Transit produces a flux drop of 11,460 ppm lasting ≈ 2.49 h.

Extended Orbital Architecture

Planet / star radius ratio

0.107000

Semi-major axis / stellar radius

3.230

Impact parameter (b)

0.320

RV semi-amplitude (K)

494.000 m/s

Transit mid-time (BJD)

2,457,247.2479

Angular separation (arcsec)

0.04600

Eq. Temperature

2,453K

(2180 °C)

Insolation (S⊕)

6,992.03

Earth = 1.00

Earth Similarity (ESI)

0.049

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Oberst et al. 2017

Instrument

Apogee 4K CCD Sensor

Publication

2017-03

Observation locale

Ground

Host System: KELT-16

Spectral Class

F-type yellow-white

Effective Temperature

6,236 K — hotter than the Sun (5,778 K)

Estimated Age

3.10 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.360 R☉

Stellar Mass

1.211 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.253 dex

Stellar density

0.679 g/cm³

Systemic radial velocity

-29.70 km/s

Rotational v·sin i

7.60 km/s

Metallicity ratio

[Fe/H]

Distance

444.59 parsec

Light-years 1,450.04 ly

V-band magnitude

11.72 mag

Voyager-speed travel 25,571,523 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

2.221 mas

Total Proper Motion

6.079 mas/yr

PM Right Ascension

5.58 mas/yr

PM Declination

2.41 mas/yr

Galactic Cartesian (pc)

x = 0.594 · y = -0.610 · z = 0.525

Equatorial (J2000)

RA 314.26852° · Dec 31.66102°

Galactic ℓ, b

75.592° · -8.942°

Ecliptic λ, β

329.464° · 46.388°

HTM-20 index

-971447522