NN Ser is 1,682 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this WD star; the first was found in 2010 by eclipse timing variations (Multiple Observatories).
Fly there in 3DNN Ser c takes 19.1 years to go round its star once.
NN Ser is one of 2 stars in its system. The position of the other star is not catalogued, so only NN Ser and its planets are drawn.
| Spectral type | WD |
| Surface temperature | 57,000 K |
| Mass | 0.535 solar masses |
| Apparent magnitude | 16.943 |
| Distance from the Sun | 1682.4 light-years (515.8 parsecs) |
| Position (J2000) | RA 238.2337°, Dec 12.9121° |
| Constellation | Serpens |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| NN Ser d disputed | 7.9 years | 3.390 AU | 13.3 R⊕ estimated | 724.62 M⊕ | Eclipse Timing Variations, 2010 |
| NN Ser c disputed | 19.1 years | 5.350 AU | 12.6 R⊕ estimated | 2329.6 M⊕ | Eclipse Timing Variations, 2010 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.