18 Del planetary system
18 Del is a Sun-like main-sequence star of spectral type G6 III approximately 249 light-years from Earth (76.22 parsecs). It hosts 1 confirmed exoplanet.
Host star
- Name
- 18 Del
- Spectral type
- G6 III
- Effective temperature
- 4,980 K
- Mass
- 2.10 M☉ (solar masses)
- Radius
- 8.80 R☉ (solar radii)
- Distance
- 76.22 pc (249 ly)
- Hipparcos catalog
- HIP 103527
Confirmed planets (1)
| Planet | Class | Mass (M⊕) | Radius (R⊕) | Period (d) | Distance (AU) | Eq. temp (K) | Discovered |
|---|---|---|---|---|---|---|---|
| 18 Del b | Neptune-like | 2926.25 | 12.50 | 982.85 | 2.4760 | — | 2008 |
The planets in detail
18 Del b is a Neptune-like world with about 12.50 Earth radii and 2926.25 Earth masses. It orbits 18 Del at 2.4760 AU with a 2.7-Earth-year orbit, and no published equilibrium temperature. It was confirmed in 2008 via radial velocity (Doppler) measurements.
Discovery
The single planet in the 18 Del system was confirmed in 2008 using radial velocity (Doppler) measurements. Detection facilities: Okayama Astrophysical Observatory.
Observing from Earth
Exoplanets cannot be resolved visually with amateur telescopes — the host star's glare is overwhelming and even space-based direct imaging requires sophisticated coronagraphs. What you can observe is the host star itself at right ascension 314.6078°, declination 10.8391°. Use the 3D orrery above to inspect orbital geometry, planetary scale, and the habitable-zone overlay — the orbits are computed from the published Keplerian elements and animate at user-controlled time rates.
