A subsatellite, also known as a submoon or informally a moonmoon, is a "moon of a moon" or a hypothetical natural satellite that orbits the moon of a planet...

mapping camera, a laser altimeter, a mass spectrometer, and a lunar subsatellite deployed at the end of the moonwalks. The Lunar Module returned safely...

In the case of satellites, it is also known as a suborbital track or subsatellite track, and is the vertical projection of the satellite's orbit onto the...

Young and Duke rejoined Mattingly in lunar orbit, the crew released a subsatellite from the service module (SM). During the return trip to Earth, Mattingly...

A hypothetical Solar System object is a planet, natural satellite, subsatellite or similar body in the Solar System whose existence is not known, but has...

able to host its own moon, called a subsatellite, in a stable orbit, although no evidence for such a subsatellite has been found. The original paper presented...

stage". Retrieved 2011-01-01. "NASA NSSDC Master Catalog – Apollo 15 subsatellite". Retrieved 2011-01-01. "NASA NSSDC Master Catalog – Luna 20". Retrieved...

can stay in a low orbit indefinitely. The Apollo 15 subsatellite PFS-1 and the Apollo 16 subsatellite PFS-2, both small satellites released from the Apollo...

Hypothetical objects Fifth giant Nemesis Phaeton Planet Nine Planet V Planet X Subsatellites Theia Tyche Vulcan Vulcanoids Exploration (outline) Colonization Discovery...

cloud Hills Cloud Meteoroid Micrometeoroid Meteor Bolide Moons Moonlets Subsatellites (hypothet.) Minor planets (see below) Asteroids Dwarf planets Moons...

and the time span of the Doppler data. Apollos 15 and 16 released subsatellites. The Kaguya/SELENE mission had tracking between 3 satellites to get...

provide coverage of Cuban activity. Mission 4009 included an ELINT P-11 subsatellite for radar monitoring, which was launched into a higher orbit. (NSSDC...

S. state in which this happens, the event is known as Lahaina Noon. Subsatellite point Ian Ridpath, ed. (1997). "subsolar point". A Dictionary of Astronomy...

have used it to photograph the Earth. SIM also had other sensors and a subsatellite. Sector 2 (70°) contained the service propulsion system (SPS) oxidizer...

early to be used as a life boat. The LM frequencies were also used by subsatellites deployed in lunar orbit after the LM had departed the Moon, as part...

Huoyan-1 early warning class, and an unknown class for TJS-3 and its subsatellite. TJS-1, TJS-4, and TJS-9 satellites, launched in 2015, 2019, and 2021...

both a ring system and a subsatellite, which would be possible due to the large Hill sphere mentioned above. The subsatellite then proceeds to quickly...

AMPTE-UKS, also called AMPTE-United Kingdom Subsatellite, was a United Kingdom satellite designed and tasked to study the magnetosphere of Earth, being...

Hypothetical objects Fifth giant Nemesis Phaeton Planet Nine Planet V Planet X Subsatellites Theia Tyche Vulcan Vulcanoids Exploration (outline) Colonization Discovery...

in lunar orbit, continuing Worden's observations. After releasing a subsatellite, they ignited their service propulsion system to put them on a trajectory...

concentrations, or "mascons". Data from the missions, and from the lunar subsatellites left by Apollo 15 and 16, were used to map such variations in lunar...

trip, two of the SIM bays, on Apollos 15 and 16, also launched a lunar "subsatellite" before the astronauts performed the Trans-Earth Injection burn with...

satellites of the Solar System – Astronomical body that orbits a planet Subsatellite, also known as a submoon or moonmoon Tidally detached exomoon – Planet...

their orbital periods are hundreds of days. No "moons of moons" or subsatellites (natural satellites that orbit a natural satellite of a planet) are...

Venera-D could incorporate some NASA components, including balloons, a subsatellite for plasma measurements, or a long-lived (24 hours) surface station on...

tallest mountains in the Solar System Lists of astronomical objects Subsatellite The moons more massive than Iapetus are: the Moon, the 4 Galilean moons...

Jupiter's moon Amalthea that is likely debris ejected from its surface Subsatellites Look up moonlet in Wiktionary, the free dictionary. Minor-planet moon...

satellite telemetry. Missions 1210 to 1212 also included scientific subsatellites. IRCB (Infra-Red Calibration Balloon) was an 66 cm diameter inflatable...

Hypothetical objects Fifth giant Nemesis Phaeton Planet Nine Planet V Planet X Subsatellites Theia Tyche Vulcan Vulcanoids Exploration (outline) Colonization Discovery...

Operational 1 Retired 1 Maiden launch Sentinel-1A (3 April 2014) Last launch Sentinel-1B (25 April 2016) Related spacecraft Subsatellite of Copernicus Programme...