Stellar HostProfile

HAT-P-11

K4 • 37.76 pc

Records

literature rows

Planets

system count

References

distinct source labels

TIC: TIC 28230919HIP: HIP 97657

Approximate color

from effective temperature

Stellar source: Bakos et al. 2010 • System source: TICv8

Temperature

4780 K

4624 to 4864

19 values • 11 distinct

Mass

0.81 Msun

0.77 to 0.88

16 values • 11 distinct

Radius

0.75 Rsun

0.68 to 1.34

19 values • 12 distinct

Age

6.50 Gyr

2.69 to 9

6 values • 3 distinct

Luminosity

-0.58 log(Lsun)

-0.58 to -0.56

3 values • 3 distinct

Distance

37.76 pc

single adopted value

25 values • 1 distinct

Spectral Type

Consistent across records

K4 (2)

Planets

Stable across source rows

Sun

1.0 R☉ baseline

HAT-P-11

0.75 R☉

Discovery

2010

Period

4.89 days

Radius

—

Mass

23.52 M⊕

Eq. Temp

—

Discovery

2018

Period

3361 days

Radius

—

Mass

851.8 M⊕

Eq. Temp

—

HAT-P-11: A Cool Star with Two Known Planets

HAT-P-11 is a K4 star located 123 light-years away. The star is 6.5 billion years old and has a mass of 0.81 solar masses, a radius of 0.75 solar radii, and a temperature of 4780 K. Its mass, radius, and temperature are all smaller or cooler than the Sun's. Two planets are known to orbit this host.

HAT-P-11 b was discovered by transit in 2010 and has a minimum mass of 23.5 Earth masses and an orbital period of 4.89 days. Its minimum mass is larger than Earth's.

HAT-P-11 c was discovered by radial velocity in 2018 and has a mass of 852 Earth masses and an orbital period of 3360 days, which is roughly 2.68 times Jupiter's mass. Among the listed planets, HAT-P-11 b has the shortest year and HAT-P-11 c has the longest.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

25 values • 1 distinct

Parallaxstable

25 values • 1 distinct

Temperaturedisputed

19 values • 11 distinct

Massdisputed

16 values • 11 distinct

Radiusdisputed

19 values • 12 distinct

Agedisputed

6 values • 3 distinct

Luminositydisputed

3 values • 3 distinct

Surface Gravitydisputed

14 values • 9 distinct

Metallicitydisputed

13 values • 7 distinct

Spectral Typestable

2 values • 1 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
4653	0.81	0.74	2.69	—	—	37.76	Morton et al. 2016	TICv8
4780	0.81	0.68	6.50	—	—	37.76	Yee et al. 2018	TICv8
4757.3	—	0.77	—	-0.56	—	37.76	Gaia DR2	TICv8
4780	0.86	0.76	6.50	—	—	37.76	Basilicata et al. 2024	TICv8
4766	—	0.74	—	—	—	37.76	Batalha et al. 2013	TICv8
4777	0.83	0.77	—	—	—	37.76	Q1-Q16 KOI Table	TICv8
4864	—	0.75	—	—	—	37.76	Berger et al. 2018	TICv8
4757.3	—	0.76	—	—	—	37.76	ExoFOP	TICv8
4780	0.81	0.75	6.50	-0.58	K4	37.76	Bakos et al. 2010	TICv8
—	0.81	—	—	—	—	37.76	Xuan & Wyatt 2020	TICv8
4766	0.79	0.74	9	—	—	37.76	Q1-Q8 KOI Table	TICv8
—	—	—	—	—	—	37.76	Sanchis-Ojeda & Winn 2011	TICv8
—	0.81	—	—	—	—	37.76	An et al. 2025	TICv8
4766	—	0.74	—	—	—	37.76	Q1-Q6 KOI Table	TICv8
4653	—	0.74	2.69	—	K4	37.76	Bourrier et al. 2023	TICv8
4778	0.83	0.76	—	—	—	37.76	Q1-Q17 DR25 KOI Table	TICv8
4777	0.83	0.77	—	—	—	37.76	Q1-Q12 KOI Table	TICv8
4777	0.83	0.77	—	—	—	37.76	Q1-Q17 DR24 KOI Table	TICv8
—	0.81	—	—	—	—	37.76	Knutson et al. 2014	TICv8
4624	0.85	1.34	—	—	—	37.76	Mortier et al. 2013	TICv8
4777.6	0.77	0.76	—	-0.57	—	37.76	TICv8	TICv8
4780	0.81	0.69	—	—	—	37.76	Southworth 2011	TICv8
4708	0.88	0.77	—	—	—	37.76	Stassun et al. 2017	TICv8
—	—	—	—	—	—	37.76	Morris et al. 2017	TICv8
—	—	—	—	—	—	37.76	Q1-Q17 DR25 Supplemental KOI Table	TICv8

HAT-P-11

Adopted host values from one source row

Radius against the Sun

Known planets

HAT-P-11 b

HAT-P-11 c

HAT-P-11: A Cool Star with Two Known Planets

Underlying measurements and references