Stellar HostProfile

GJ 436

Unclassified star • 9.75 pc

Records

literature rows

Planets

system count

References

distinct source labels

HIP: HIP 57087TIC: TIC 138819293

Approximate color

from effective temperature

Stellar source: Torres et al. 2008 • System source: TICv8

Temperature

3350 K

3350 to 3660.4

15 values • 10 distinct

Mass

0.45 Msun

0.40 to 0.56

14 values • 10 distinct

Radius

0.46 Rsun

0.42 to 0.47

13 values • 11 distinct

Age

6 Gyr

3 to 15

3 values • 3 distinct

Luminosity

-1.58 log(Lsun)

-1.63 to -1.52

4 values • 4 distinct

Distance

9.75 pc

single adopted value

26 values • 1 distinct

Planets

Stable across source rows

Sun

1.0 R☉ baseline

GJ 436

0.46 R☉

Discovery

2004

Period

2.64 days

Radius

4.17 R⊕

Mass

22.10 M⊕

Eq. Temp

—

GJ 436 and Its Lone Known Planet

GJ 436 is a small, cool red dwarf of spectral type M3 V, sitting 31.8 light-years from us. Its mass is 0.452 solar masses and its radius is 0.464 solar radii, both smaller than the Sun's, and its temperature of 3350 K is cooler than the Sun's. The star is also old, with an age of 6 billion years. One planet orbits this host.

That planet, GJ 436 b, was discovered in 2004 by the radial velocity method, which measures the wobble a planet's gravity induces in its star's motion. It is a Jupiter-like world, with a radius of 4.17 Earth radii - larger than Earth's - and a mass of 22.1 Earth masses, also larger than Earth's. Its orbital period is 2.64 days, and its mean density is 1.68 g/cm³, 0.305 times Earth's.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

26 values • 1 distinct

Parallaxstable

26 values • 1 distinct

Temperaturedisputed

15 values • 10 distinct

Massdisputed

14 values • 10 distinct

Radiusdisputed

13 values • 11 distinct

Agedisputed

3 values • 3 distinct

Luminositydisputed

4 values • 4 distinct

Surface Gravitydisputed

12 values • 10 distinct

Metallicitydisputed

10 values • 6 distinct

Spectral Typedisputed

5 values • 4 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
—	0.45	—	—	—	—	9.75	Knutson et al. 2014	TICv8
3431	0.40	0.47	—	-1.52	M3	9.75	Turnbull 2015	TICv8
—	0.41	—	3	—	M2.5 V	9.75	Butler et al. 2004	TICv8
3350	—	—	—	—	—	9.75	Turner et al. 2016	TICv8
3660.4	—	—	—	—	—	9.75	Gaia DR2	TICv8
3500	0.46	0.45	—	—	—	9.75	Southworth 2010	TICv8
—	—	—	—	—	M2.5	9.75	Hawley et al. 1996	TICv8
3456	0.42	0.43	—	-1.63	—	9.75	TICv8	TICv8
3350	0.44	—	—	-1.62	—	9.75	Maness et al. 2007	TICv8
3479	0.45	0.45	—	—	—	9.75	Bourrier et al. 2018	TICv8
3505	0.45	0.42	—	—	—	9.75	Maxted et al. 2022	TICv8
—	—	—	—	—	—	9.75	Nidever et al. 2002	TICv8
—	—	—	—	—	M2.5 V	9.75	Salz et al. 2015	TICv8
3416	0.56	0.46	—	—	—	9.75	Lanotte et al. 2014	TICv8
3586.1	0.44	0.42	—	—	—	9.75	Rosenthal et al. 2021	TICv8
3350	0.45	0.46	6	-1.58	—	9.75	Torres et al. 2008	TICv8
—	—	—	15	—	—	9.75	Sanz-Forcada et al. 2010	TICv8
—	—	—	—	—	M3 V	9.75	Kirkpatrick et al. 1991	TICv8
—	—	—	—	—	—	9.75	Butler et al. 2004	TICv8
—	—	—	—	—	—	9.75	Wright et al. 2004	TICv8
3456	—	0.43	—	—	—	9.75	ExoFOP	TICv8
3585	0.45	0.44	—	—	—	9.75	Knutson et al. 2011	TICv8
—	—	0.45	—	—	—	9.75	Shporer et al. 2009	TICv8
3500	0.45	0.45	—	—	—	9.75	Pont et al. 2009	TICv8
3500	—	—	—	—	—	9.75	Caceres et al. 2009	TICv8
—	0.47	0.46	—	—	—	9.75	Maciejewski et al. 2014	TICv8

GJ 436

Adopted host values from one source row

Radius against the Sun

Known planets

GJ 436 b

GJ 436 and Its Lone Known Planet

Underlying measurements and references