Stellar HostProfile

51 Peg

G5V • 15.46 pc

Records

literature rows

Planets

system count

References

distinct source labels

HD: HD 217014HIP: HIP 113357TIC: TIC 139298196

Approximate color

from effective temperature

Stellar source: Turnbull 2015 • System source: TICv8

Temperature

5787 K

5758 to 5830

9 values • 9 distinct

Mass

1.05 Msun

1.03 to 1.12

8 values • 7 distinct

Radius

1.15 Rsun

1.15 to 1.29

8 values • 7 distinct

Age

6.76 Gyr

4 to 15

5 values • 4 distinct

Luminosity

0.16 log(Lsun)

0.14 to 0.16

3 values • 3 distinct

Distance

15.46 pc

single adopted value

35 values • 1 distinct

Spectral Type

G5V

Multiple classifications reported

G0 (1), G2 V+ (1), G2.5 IV (1), G3 V (1), G5V (1)

Planets

Stable across source rows

Sun

1.0 R☉ baseline

51 Peg

1.15 R☉

Discovery

1995

Period

4.23 days

Radius

—

Mass

193.9 M⊕

Eq. Temp

—

51 Peg and Its Planet

51 Peg is a G5V star 50.4 light-years away. It has one known planet. The star is 6.76 billion years old, with a mass of 1.05 solar masses, a radius of 1.15 solar radii, and a temperature of 5790 K. Its mass and radius are larger than the Sun's, and it is hotter than the Sun.

The planet 51 Peg b was discovered in 1995 by the radial velocity method, which detects the wobble a planet's gravity induces in its star. It has a mass of 194 Earth masses, larger than Earth's, and orbits in 4.23 days.

Evidence Summary

Rows

Stellar refs

System refs

Distancestable

35 values • 1 distinct

Parallaxstable

35 values • 1 distinct

Temperaturedisputed

9 values • 9 distinct

Massdisputed

8 values • 7 distinct

Radiusdisputed

8 values • 7 distinct

Agedisputed

5 values • 4 distinct

Luminositydisputed

3 values • 3 distinct

Surface Gravitydisputed

8 values • 7 distinct

Metallicitydisputed

7 values • 4 distinct

Spectral Typedisputed

5 values • 5 distinct

ST TEFF	ST MASS	ST RAD	ST AGE	ST LUM	ST SPECTYPE	SY DIST	Stellar Ref	System Ref
—	1.04	—	—	—	—	15.46	Martins et al. 2015	TICv8
5773	—	1.29	10	—	—	15.46	Mayor & Queloz 1995	TICv8
—	—	—	—	—	G2 V+	15.46	Gray et al. 2006	TICv8
5830	—	1.16	—	0.15	—	15.46	Gaia DR2	TICv8
5786	—	—	—	—	—	15.46	Maldonado et al. 2015	TICv8
—	—	—	—	—	—	15.46	Nordstrom et al. 2004	TICv8
—	—	—	—	—	G0	15.46	Cannon & Pickering 1918	TICv8
5793	1.12	1.20	4	—	G2.5 IV	15.46	Fuhrmann et al. 1997	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
5805	1.04	—	—	—	—	15.46	Santos et al. 2003	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Nidever et al. 2002	TICv8
5760.8	1.07	1.19	—	—	—	15.46	Rosenthal et al. 2021	TICv8
—	—	—	15	—	—	15.46	Sanz-Forcada et al. 2010	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Henry et al. 1996	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
5758	1.03	1.18	—	0.14	—	15.46	TICv8	TICv8
5787	1.05	1.15	6.76	0.16	G5V	15.46	Turnbull 2015	TICv8
—	—	—	—	—	—	15.46	Naef et al. 2004	TICv8
—	—	—	—	—	—	15.46	Wright et al. 2004	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
5761	1.07	1.19	—	—	—	15.46	Cont et al. 2026	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	1.05	1.15	6.76	—	—	15.46	Takeda et al. 2007	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Valenti & Fischer 2005	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	—	15.46	Duncan et al. 1991	TICv8
—	—	—	—	—	G3 V	15.46	Gray et al. 2003	TICv8

51 Peg

Adopted host values from one source row

Radius against the Sun

Known planets

51 Peg b

51 Peg and Its Planet

Underlying measurements and references