Key parameters at a glance
- A radius of 12.90 Earth radii
- A mass of 1,589.14 Earth masses
- Surface gravity around 9.55 g
- An orbital period of 3,668.000 days
- Semi-major axis 4.9200 AU
- Distance from Earth 152.06 light-years
- Earth Similarity Index 0.429
- Travel time at Voyager 1 speed 2,681,609 years
Context from the literature
HD 24040 b is a long-period exoplanet taking approximately 3500 days to orbit at 4.6 astronomical units in an almost circular orbit. It has a minimum mass 4 times that of Jupiter.
Excerpted from Wikipedia · full article
1 sibling around HD 24040
HD 24040 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 24040 c | Neptune-like | 9.35 | 63.88 | 515.400 | — | 2021 |
| HD 24040 b this | Gas Giant | 12.90 | 1,589.14 | 3,668.000 | — | 2006 |
HD 24040 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1011of 1771
top 57.0%
This planet
12.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 24040 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.90 | 11.21 |
| Mass (M⊕) | 1.00 | 1,589.14 | 317.83 |
| Density (g/cm³) | 5.51 | 4.07 | 1.33 |
| Surface Gravity (g) | 1.00 | 9.55 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,589.142 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,226.824 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 24040
HIP
HIP 17960
TIC
TIC 456863621
Gaia DR2
Gaia DR2 43802039287826432
Gaia DR3
Gaia DR3 43802039287826432
System
HD 24040
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 10.04 Earth years on a nearly circular orbit at a mean orbital distance of 4.9200 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
47.400 m/s
Transit mid-time (BJD)
2,456,932.0000
Long. of periastron (ω)
67.00°
Angular separation (arcsec)
106.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.429
0 = alien, 1 = Earth-identical
Detection Signatures
Radial velocity
Stellar wobble has been measured spectroscopically.
Astrometry
Positional wobble of the host star was measured.
Discovery Paper
Primary reference
Wright et al. 2007Instrument
HIRES Spectrometer
Publication
2007-03
Observation locale
Ground
Discovery cohort
Planets confirmed in 2006 at W. M. Keck Observatory (7 shown).
Host System: HD 24040
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,802 K — hotter than the Sun (5,778 K)
Estimated Age
6.68 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.300 R☉
Stellar Mass
1.110 M☉
Metallicity [Fe/H]
0.19
Extended Stellar Properties
Surface gravity (log g)
4.260 dex
Stellar density
0.554 g/cm³
Systemic radial velocity
-9.90 km/s
Rotational v·sin i
2.39 km/s
Activity index (log R'HK)
-5.090
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
21.420 mas
Total Proper Motion
275.382 mas/yr
PM Right Ascension
113.22 mas/yr
PM Declination
-251.03 mas/yr
Galactic Cartesian (pc)
x = 0.511 · y = 0.805 · z = 0.300
Equatorial (J2000)
RA 57.59621° · Dec 17.47529°
Galactic ℓ, b
172.293° · -27.781°
Ecliptic λ, β
59.221° · -2.569°
HTM-20 index
1225849445
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