Key parameters at a glance
- A radius of 13.90 Earth radii
- A mass of 260.62 Earth masses
- Surface gravity around 1.35 g
- An orbital period of 1,049.000 days
- Semi-major axis 2.0700 AU
- Distance from Earth 150.33 light-years
- Earth Similarity Index 0.293
- Travel time at Voyager 1 speed 2,651,027 years
5 siblings around HD 34445
HD 34445 b shares its host star with 5 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| HD 34445 e | Neptune-like | 4.26 | 16.80 | 49.175 | — | 2017 |
| HD 34445 d | Neptune-like | 6.07 | 30.70 | 117.870 | — | 2017 |
| HD 34445 c | Neptune-like | 8.42 | 53.50 | 214.670 | — | 2017 |
| HD 34445 f | Neptune-like | 6.88 | 37.90 | 676.800 | — | 2017 |
| HD 34445 b this | Gas Giant | 13.90 | 260.62 | 1,049.000 | — | 2009 |
| HD 34445 g | Gas Giant | 13.60 | 120.60 | 5,700.000 | — | 2017 |
HD 34445 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#456of 1771
top 25.7%
This planet
13.90R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 34445 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.90 | 11.21 |
| Mass (M⊕) | 1.00 | 260.62 | 317.83 |
| Density (g/cm³) | 5.51 | 0.53 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.35 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Minimum mass (M sin i) | 260.621 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 34445
HIP
HIP 24681
TIC
TIC 284907742
Gaia DR2
Gaia DR2 3241295308714904960
Gaia DR3
Gaia DR3 3241295308714904960
System
HD 34445
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 2.87 Earth years on a mildly elliptical path at a mean orbital distance of 2.0700 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
15.700 m/s
Transit mid-time (BJD)
2,454,809.0000
Long. of periastron (ω)
104.00°
Angular separation (arcsec)
44.90000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.293
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Howard et al. 2010Instrument
HIRES Spectrometer
Publication
2010-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at W. M. Keck Observatory (12 shown).
Host System: HD 34445
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,879 K — hotter than the Sun (5,778 K)
Estimated Age
8.50 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.380 R☉
Stellar Mass
1.140 M☉
Metallicity [Fe/H]
0.18
Extended Stellar Properties
Surface gravity (log g)
4.210 dex
Stellar density
0.467 g/cm³
Systemic radial velocity
-79.04 km/s
Rotational v·sin i
2.70 km/s
Rotation period
22.00 days
Activity index (log R'HK)
-5.040
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
21.668 mas
Total Proper Motion
146.999 mas/yr
PM Right Ascension
-0.81 mas/yr
PM Declination
-147.00 mas/yr
Galactic Cartesian (pc)
x = 0.182 · y = 0.975 · z = 0.128
Equatorial (J2000)
RA 79.42075° · Dec 7.35272°
Galactic ℓ, b
195.039° · -17.022°
Ecliptic λ, β
79.094° · -15.687°
HTM-20 index
2057180744
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