Back to Stellar Hosts
Stellar HostProfile

HR 8799

A5 • 41.24 pc

Records

8

literature rows

Planets

4

system count

References

9

distinct source labels

HD: HD 218396TIC: TIC 245368902HIP: HIP 114189

Approximate color

from effective temperature

Canonical Summary

Adopted host values from all rows

Numeric fields use the median of non-null measurements. Disagreement stays visible through ranges, counts, and provenance.

Temperature

7357.8 K

7204.6 to 7400

4 values • 4 distinct

Mass

1.51 Msun

1.50 to 1.61

3 values • 3 distinct

Radius

1.47 Rsun

1.44 to 1.49

2 values • 2 distinct

Age

0.04 Gyr

0.03 to 0.06

2 values • 2 distinct

Luminosity

0.73 log(Lsun)

0.69 to 0.74

3 values • 3 distinct

Distance

41.24 pc

single adopted value

8 values • 1 distinct

Spectral Type

A5

Multiple classifications reported

A5 (2), A5 V (1), F0+ V ({lambda} Boo)... (1)

Planets

4

Stable across source rows

4

Scale Comparison

Radius against the Sun

Current adopted radius: 1.47 R☉ • circles scaled linearly by radius

Sun

1.0 R☉ baseline

HR 8799

1.47 R☉

System Layout

Known planets

4 planets linked to this host

HR 8799 e

Imaging

Discovery

2010

Period

Radius

10.09 R⊕

Mass

Eq. Temp

1300 K

HR 8799 d

Imaging

Discovery

2008

Period

Radius

10.09 R⊕

Mass

Eq. Temp

1300 K

HR 8799 b

Imaging

Discovery

2008

Period

Radius

6.73 R⊕

Mass

Eq. Temp

1200 K

HR 8799 c

Imaging

Discovery

2008

Period

8.33e4 days

Radius

Mass

Eq. Temp

Provenance

Underlying measurements and references

Evidence Summary

Rows

8

Stellar refs

8

System refs

1

Distancestable

8 values • 1 distinct

Parallaxstable

8 values • 1 distinct

Temperaturedisputed

4 values • 4 distinct

Massdisputed

3 values • 3 distinct

Radiusdisputed

2 values • 2 distinct

Agedisputed

2 values • 2 distinct

Luminositydisputed

3 values • 3 distinct

Surface Gravitydisputed

3 values • 3 distinct

Metallicitydisputed

3 values • 3 distinct

Spectral Typedisputed

4 values • 3 distinct

ST TEFFST MASSST RADST AGEST LUMST SPECTYPESY DISTStellar RefSystem Ref
74000.03A541.24Gravity Collaboration et al. 2019TICv8
733941.24Swastik et al. 2021TICv8
1.5141.24Zurlo et al. 2016TICv8
1.500.060.69A5 V41.24Marois et al. 2008TICv8
7204.61.611.490.7341.24TICv8TICv8
F0+ V ({lambda} Boo)...41.24Gray et al. 2003TICv8
7376.71.440.7441.24Gaia DR2TICv8
A541.24Cannon & Pickering 1918TICv8