Key parameters at a glance
- A radius of 12.70 Earth radii
- A mass of 1,995.89 Earth masses
- Surface gravity around 12.37 g
- An orbital period of 10,220.000 days
- Semi-major axis 8.1900 AU
- Distance from Earth 997.01 light-years
- Earth Similarity Index 0.442
- Travel time at Voyager 1 speed 17,582,212 years
Context from the literature
DP Leonis is a binary star system in the equatorial constellation of Leo. It is a variable star that ranges in apparent visual magnitude from 17.5 down to 19. The system is located at a distance of approximately 990 light-years from the Sun based on parallax. It is a cataclysmic variable star of the AM Herculis-type also known as polars. The system comprises an eclipsing white dwarf and red dwarf in tight orbit and an extrasolar planet. This eclipsing variable was discovered by P. Biermann and associates in 1982 as the optical counterpart to the EINSTEIN X-ray source E1114+182.
Excerpted from Wikipedia · full article
Circumbinary planet
DP Leo b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.
DP Leo 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 | DP Leo b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.70 | 11.21 |
| Mass (M⊕) | 1.00 | 1,995.89 | 317.83 |
| Density (g/cm³) | 5.51 | 5.35 | 1.33 |
| Surface Gravity (g) | 1.00 | 12.37 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 1,995.888 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 1,922.790 M⊕ | Lower bound from radial-velocity fitting. |
Star Catalogue Identifiers
TIC
TIC 903484062
Gaia DR2
Gaia DR2 3971777500966832384
Gaia DR3
Gaia DR3 3971777500966832384
System
DP Leo
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts about 27.98 Earth years on a highly eccentric trajectory at a mean orbital distance of 8.1900 AU.
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.442
0 = alien, 1 = Earth-identical
Discovery Paper
Primary reference
Qian et al. 2010Instrument
6K CCD Mosaic
Publication
2010-01
Observation locale
Ground
Host System: DP Leo
Spectral Class
B-type blue-white
Effective Temperature
13,500 K — hotter than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.012 R☉
Stellar Mass
0.690 M☉
Metallicity [Fe/H]
—
Astrometric Data
Parallax
3.278 mas
Total Proper Motion
28.736 mas/yr
PM Right Ascension
-28.70 mas/yr
PM Declination
-1.44 mas/yr
Galactic Cartesian (pc)
x = -0.935 · y = 0.176 · z = 0.308
Equatorial (J2000)
RA 169.31622° · Dec 17.96157°
Galactic ℓ, b
230.896° · 66.456°
Ecliptic λ, β
163.070° · 12.286°
HTM-20 index
995532435
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