Stellar HostProfile

55 Cnc

G8 V • 12.59 pc

Records

literature rows

Planets

system count

References

distinct source labels

HIP: HIP 43587TIC: TIC 332064670HD: HD 75732

Approximate color

from effective temperature

Temperature

5250 K

5172 to 5334

15 values • 13 distinct

Mass

0.95 Msun

0.85 to 1.01

17 values • 10 distinct

Radius

0.94 Rsun

0.93 to 0.98

14 values • 7 distinct

Age

8.37 Gyr

5 to 10.20

6 values • 6 distinct

Luminosity

-0.20 log(Lsun)

-0.23 to -0.18

4 values • 4 distinct

Distance

12.59 pc

single adopted value

29 values • 1 distinct

Spectral Type

G8 V

Multiple classifications reported

G8 V (4), K0 IV-V (3), G8V (1), K0 (1)

Planets

Stable across source rows

Sun

1.0 R☉ baseline

55 Cnc

0.94 R☉

Discovery

2004

Period

44.42 days

Radius

—

Mass

54.47 M⊕

Eq. Temp

—

Discovery

2002

Period

4909 days

Radius

—

Mass

1121.9 M⊕

Eq. Temp

—

Discovery

2004

Period

0.74 days

Radius

1.86 R⊕

Mass

—

Eq. Temp

—

Discovery

2007

Period

260 days

Radius

—

Mass

45.77 M⊕

Eq. Temp

—

Discovery

1996

Period

14.65 days

Radius

—

Mass

240 M⊕

Eq. Temp

—

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

29 values • 1 distinct

Parallaxstable

29 values • 1 distinct

Temperaturedisputed

15 values • 13 distinct

Massdisputed

17 values • 10 distinct

Radiusdisputed

14 values • 7 distinct

Agedisputed

6 values • 6 distinct

Luminositydisputed

4 values • 4 distinct

Surface Gravitydisputed

14 values • 10 distinct

Metallicitydisputed

13 values • 8 distinct

Spectral Typedisputed

9 values • 4 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
5200	0.85	—	5	—	G8 V	12.59	Butler et al. 1997	TICv8
—	—	—	—	—	—	12.59	Nidever et al. 2002	TICv8
—	0.95	—	—	—	—	12.59	McArthur et al. 2004	TICv8
5292	—	—	—	—	—	12.59	Harada et al. 2025	TICv8
5196	0.91	0.94	10.20	-0.23	K0 IV-V	12.59	von Braun et al. 2011	TICv8
—	—	—	—	—	K0	12.59	Cannon & Pickering 1918	TICv8
5198	1.01	0.98	10	—	G8 V	12.59	Moutou et al. 2026	TICv8
5272	0.91	0.94	—	—	—	12.59	Zhao et al. 2023	TICv8
5334	—	—	—	—	—	12.59	Maldonado et al. 2015	TICv8
5306	—	0.95	—	-0.19	—	12.59	Gaia DR2	TICv8
—	0.95	—	—	—	—	12.59	Baluev 2015	TICv8
—	—	—	—	—	—	12.59	Wright et al. 2004	TICv8
5250	0.90	0.96	—	-0.20	—	12.59	TICv8	TICv8
—	—	—	—	—	—	12.59	Valenti & Fischer 2005	TICv8
—	—	—	—	—	K0 IV-V	12.59	Salz et al. 2015	TICv8
—	—	—	—	—	—	12.59	Naef et al. 2004	TICv8
—	0.96	0.94	—	—	G8 V	12.59	Winn et al. 2011	TICv8
5235	0.96	0.93	9.50	-0.18	G8V	12.59	Turnbull 2015	TICv8
5172	0.87	0.95	—	—	—	12.59	Dai et al. 2019	TICv8
5250	—	0.96	—	—	—	12.59	ExoFOP	TICv8
5234	0.91	0.94	—	—	—	12.59	Demory et al. 2011	TICv8
—	0.96	0.93	7.24	—	—	12.59	Takeda et al. 2007	TICv8
—	0.95	—	5.50	—	G8 V	12.59	Marcy et al. 2002	TICv8
—	—	—	—	—	—	12.59	Bourrier & Hébrard 2014	TICv8
5172	0.91	0.94	—	—	—	12.59	Bourrier et al. 2018	TICv8
5317.9	0.97	0.96	—	—	—	12.59	Rosenthal et al. 2021	TICv8
—	—	—	—	—	K0 IV-V	12.59	Gray et al. 2003	TICv8
—	1.01	0.98	—	—	—	12.59	Crida et al. 2018	TICv8
5307	0.88	—	—	—	—	12.59	Santos et al. 2003	TICv8

55 Cnc

Adopted host values from all rows

Radius against the Sun

Known planets

55 Cnc c

55 Cnc d

55 Cnc e

55 Cnc f

55 Cnc b

Underlying measurements and references