Key parameters at a glance
- A radius of 14.20 Earth radii
- A mass of 177.98 Earth masses
- Surface gravity around 0.88 g
- An orbital period of 24.356 days
- Semi-major axis 0.1500 AU
- Equilibrium temperature 486 K (213 °C)
- Distance from Earth 64.04 light-years
- Earth Similarity Index 0.242
- Travel time at Voyager 1 speed 1,129,410 years
- Almost certainly tidally locked to its host star given the close orbit
HD 192263 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#334of 1771
top 18.8%
This planet
14.20R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 192263 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.20 | 11.21 |
| Mass (M⊕) | 1.00 | 177.98 | 317.83 |
| Density (g/cm³) | 5.51 | 0.34 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.88 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 177.985 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 192263
HIP
HIP 99711
TIC
TIC 243962745
Gaia DR2
Gaia DR2 4224259562941398400
Gaia DR3
Gaia DR3 4224259562941398400
System
HD 192263
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 24.36 Earth days (6.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1500 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
51.900 m/s
Transit mid-time (BJD)
2,452,107.0900
Long. of periastron (ω)
20.00°
Angular separation (arcsec)
7.64000
Eq. Temperature
486K
(213 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.242
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Santos et al. 2000Instrument
CORALIE Spectrograph
Publication
2000-04
Observation locale
Ground
Discovery cohort
Planets confirmed in 1999 at La Silla Observatory (4 shown).
Host System: HD 192263
Spectral Class
K-type orange
Effective Temperature
4,976 K — cooler than the Sun (5,778 K)
Estimated Age
2.09 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.740 R☉
Stellar Mass
0.660 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.510 dex
Stellar density
2.539 g/cm³
Systemic radial velocity
-10.69 km/s
Rotational v·sin i
1.80 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
50.898 mas
Total Proper Motion
268.381 mas/yr
PM Right Ascension
-62.67 mas/yr
PM Declination
260.96 mas/yr
Galactic Cartesian (pc)
x = 0.552 · y = -0.834 · z = -0.015
Equatorial (J2000)
RA 303.49909° · Dec -0.86576°
Galactic ℓ, b
41.876° · -18.697°
Ecliptic λ, β
305.590° · 18.530°
HTM-20 index
255514817
Observation Record
Photometric series
3
RV measurements
3
Archive notes
1
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