What is Kerberos (moon)?
{{Infobox Planet |width = |name = S/2011 (134340) 1 |symbol = |background = |image = Pluto P4.jpg |caption = [[Hubble Space Telescope]] discovery images of S/2011 P 1. |apsis = |discovery_ref = |discoverer = Showalter M. R. ''and others''<ref name=nasanews1 /> |discovery_site = |discovered = June 28, 2011<ref name=nasanews1 /> <br>(verified July 20, 2011)<ref name=nh1 /> |discovery_method = |mp_name = |named_after = |mp_category = |alt_names = |orbit_ref = |epoch = |aphelion = |perihelion = |periastron = |apoastron = |periapsis = |apoapsis = |semimajor = |mean_orbit_radius = |eccentricity = |period = |synodic_period = |avg_speed = |mean_anomaly = |inclination = |angular_dist = |asc_node = |long_periastron = |time_periastron = |arg_peri = |semi-amplitude = |satellite_of = Pluto<ref name=nasanews1 /> |satellites = |dimensions = |flattening = |equatorial_radius = |polar_radius = |mean_radius = |circumference = |surface_area = |volume = |mass = |density = |surface_grav = |escape_velocity = |sidereal_day = |rot_velocity = |axial_tilt = _asc_north_pole = |declination = |pole_ecliptic_lat = |pole_ecliptic_lon = |albedo = |single_temperature = |temp_name1 = |min_temp_1 = |mean_temp_1 = |max_temp_1 = |temp_name2 = |min_temp_2 = |mean_temp_2 = |max_temp_2 = |spectral_type = |magnitude = |abs_magnitude =