Key parameters at a glance

A radius of 1.61 Earth radii
A mass of 3.22 Earth masses
Surface gravity around 1.24 g
An orbital period of 12.271 days
Semi-major axis 0.1058 AU
Equilibrium temperature 811 K (538 °C)
Distance from Earth 2,507.82 light-years
Earth Similarity Index 0.364
Travel time at Voyager 1 speed 44,225,461 years

Kepler-1448 b Planet Profile

Physical Specs

Radius

1.61 R⊕

Radius (Jupiter)

0.144 R♃

Mass

3.22 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.24 g/cm³

Surface Gravity

1.24 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.364

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#550of 1176

top 46.7%

This planet

1.61R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-62 e 1.61 R⊕ Kepler-149 c 1.61 R⊕ Kepler-140 b 1.61 R⊕

Metric	Earth	Kepler-1448 b	Jupiter
Radius (R⊕)	1.00	1.61	11.21
Mass (M⊕)	1.00	3.22	317.83
Density (g/cm³)	5.51	4.24	1.33
Surface Gravity (g)	1.00	1.24	2.53
Insolation (S⊕)	1.00	86.65	0.037

Star Catalogue Identifiers

TIC

TIC 298834402

Gaia DR2

Gaia DR2 2132984426823383168

Gaia DR3

Gaia DR3 2132984426823383168

System

Kepler-1448

Percentile among Super-Earth cohort

Radius 1.610 R⊕ · percentile 52 / cohort 1176

Mass 3.220 M⊕ · percentile 47 / cohort 1176

Orbital period 12.27 d · percentile 70 / cohort 1164

Distance 768.90 pc · percentile 65 / cohort 1171

ESI 0.364 · percentile 54 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

12.271 days

Semi-major axis

0.1058 AU

Eccentricity

0.000

Inclination

89.95 °

Year Length

A year here lasts approximately 12.27 Earth days (3.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1058 AU.

Transit Fingerprint

Depth

0.032 %

Duration

3.106 h

Impact parameter b

0.138

Rp / R★

0.016319

Transit midpoint (BJD)

2,454,970.5704

Photometric dip

Transit produces a flux drop of 317 ppm lasting ≈ 3.11 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016319

Semi-major axis / stellar radius

30.390

Impact parameter (b)

0.138

Transit mid-time (BJD)

2,454,970.5704

Angular separation (arcsec)

0.13800

Eq. Temperature

811K

(538 °C)

Insolation (S⊕)

86.65

Earth = 1.00

Earth Similarity (ESI)

0.364

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1448

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,774 K — cooler than the Sun (5,778 K)

Estimated Age

3.55 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

-0.16

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

3.527 g/cm³

Metallicity ratio

[Fe/H]

Distance

768.90 parsec

Light-years 2,507.82 ly

V-band magnitude

14.59 mag

Voyager-speed travel 44,225,461 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.272 mas

Total Proper Motion

3.780 mas/yr

PM Right Ascension

-2.80 mas/yr

PM Declination

-2.54 mas/yr

Galactic Cartesian (pc)

x = 0.195 · y = -0.604 · z = 0.773

Equatorial (J2000)

RA 287.86741° · Dec 50.59558°

Galactic ℓ, b

81.360° · 17.639°

Ecliptic λ, β

308.257° · 71.668°

HTM-20 index

983426924