Key parameters at a glance
- A radius of 12.70 Earth radii
- A mass of 2,005.50 Earth masses
- Surface gravity around 12.43 g
- An orbital period of 3,006.000 days
- Semi-major axis 3.7700 AU
- Distance from Earth 59.66 light-years
- Earth Similarity Index 0.442
- Travel time at Voyager 1 speed 1,052,066 years
Context from the literature
HD 87883 b is an extrasolar planet which orbits HD 87883, a K-type star on the main sequence, approximately 59 light years from Earth in the constellation of Leo Minor. It is a long-period planet, taking 8.23 years to orbit the star at the average distance of 3.77 AU in a very eccentric path, which ranges distance from 1.06 AU to 6.48 AU. It was detected by the radial velocity method on August 13, 2009.
Excerpted from Wikipedia · full article
HD 87883 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1130of 1771
top 63.7%
This planet
12.70R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HD 87883 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.70 | 11.21 |
| Mass (M⊕) | 1.00 | 2,005.50 | 317.83 |
| Density (g/cm³) | 5.51 | 5.38 | 1.33 |
| Surface Gravity (g) | 1.00 | 12.43 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 2,005.497 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 578.448 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
HD
HD 87883
HIP
HIP 49699
TIC
TIC 407591082
Gaia DR2
Gaia DR2 747266452000257280
Gaia DR3
Gaia DR3 747266452000257280
System
HD 87883
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 8.23 Earth years on a highly eccentric trajectory at a mean orbital distance of 3.7700 AU.
Extended Orbital Architecture
RV semi-amplitude (K)
51.435 m/s
Transit mid-time (BJD)
2,454,589.0000
Long. of periastron (ω)
282.10°
Angular separation (arcsec)
206.00000
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.442
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
Fischer et al. 2009Instrument
Hamilton Echelle Spectrograph
Publication
2009-10
Observation locale
Ground
Discovery cohort
Planets confirmed in 2009 at Lick Observatory (5 shown).
Host System: HD 87883
Spectral Class
K-type orange
Effective Temperature
4,980 K — cooler than the Sun (5,778 K)
Estimated Age
7.60 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.799 R☉
Stellar Mass
0.800 M☉
Metallicity [Fe/H]
0.11
Extended Stellar Properties
Surface gravity (log g)
4.549 dex
Stellar density
2.228 g/cm³
Systemic radial velocity
9.30 km/s
Rotational v·sin i
2.17 km/s
Activity index (log R'HK)
-4.980
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
54.642 mas
Total Proper Motion
89.224 mas/yr
PM Right Ascension
-64.57 mas/yr
PM Declination
-61.58 mas/yr
Galactic Cartesian (pc)
x = -0.731 · y = 0.386 · z = 0.563
Equatorial (J2000)
RA 152.17942° · Dec 34.24200°
Galactic ℓ, b
191.187° · 54.540°
Ecliptic λ, β
141.677° · 21.272°
HTM-20 index
1560425966
Observation Record
Photometric series
1
RV measurements
2
Stellar spectra
3
Archive notes
1
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