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Neptune ♆
Planet Neptune

Planet 8: Neptune



Neptune is the eighth of eight planets in our solar system (Pluto was demoted). Neptune is one of the outer "gas giant" planets. Neptune is best viewed in summer in the constellation Capricornus.

Neptune Facts
      1. Mass (kg)
      2. 1.024e+26
      1. Radius (km)
      2. 24,746
      1. Density (gm/cm3)
      2. 1.64
      1. Distance from sun (km)
      2. 4,504,300,000
      1. Rotational period (days)
      2. 16.11
      1. Orbital period (years)
      2. 164.79
      1. Orbital velocity (km/sec)
      2. 5.45
      1. Eccentricity of orbit
      2. 0.0097
      1. Tilt of axis (°)
      2. 28.31
      1. Inclination of orbit (°)
      2. 1.774
      1. Surface gravity (m/sec2)
      2. 11.0
      1. Escape velocity (km/sec)
      2. 23.50
      1. Albedo
      2. 0.41
      1. Magnitude (Vo)
      2. 7.84
      1. Cloud temperature
      2. -173°C
      1. Atmosphere
      2. H=85%, He=13%, CH4=2%
      1. Moons
      2. 13


    Rings of Neptune
        1. Name
        2. Planetary Distance (km)
        3. Shepherd Moon
        1. Galle Ring
        2. 40,90042,900
        1. Le Verrier Ring
        2. 53,200
        1. Lassell Ring
        2. 53,20057,200
        1. Arago Ring
        2. 57,200
        1. Adams Ring
        2. 62,932
        3. Galatea


      Neptune vs. Earth


      diameter = 3.9
      gravity = 1.1
      surface pressure =
      solar irradiance = 0.001
      day = 0.67
      year = 163.7
      sun distance = 30
        
      diameter = 1
      gravity = 1
      surface pressure = 1
      solar irradiance = 1
      day = 1
      year = 1
      sun distance = 1




      14 Moons of Neptune (in order of size)

      Triton is viewable using a good-sized telescope.

      Find your inner astronomer. Your complete guide to amateur astronomy.

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