Claimed moons of Earth

Other moons of Earthpermanentdiscovered a second moonEarth's second moonOther moons ofTemporary satellite of Earth
Claims of the existence of other moons of Earth—that is, of one or more natural satellites that orbit Earth, other than the Moon (Luna)—have existed for some time.wikipedia
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Moon

lunarthe MoonLuna
Claims of the existence of other moons of Earth—that is, of one or more natural satellites that orbit Earth, other than the Moon (Luna)—have existed for some time.
The Moon is an astronomical body that orbits the Earth as its only permanent natural satellite.

Frédéric Petit (astronomer)

Frédéric Petit
The first major claim of another moon of Earth was made by French astronomer Frédéric Petit, director of the Toulouse Observatory, who in 1846 announced that he had discovered a second moon in an elliptical orbit around Earth.
In 1846 he announced that he had discovered a second moon of Earth.

3753 Cruithne

Cruithne3753
They appear to orbit a point other than Earth itself, such as the orbital path of the NEO asteroid 3753 Cruithne.

Earth trojan

Earth trojan asteroidEarthEarth-Trojan asteroids
Earth trojans, such as, are NEOs that orbit the Sun (not Earth) on the same orbital path as Earth, and appear to lead or follow Earth along the same orbital path.

Georg Waltemath

In 1898 Hamburg scientist Dr. Georg Waltemath announced that he had located a system of tiny moons orbiting Earth.

Near-Earth object

near-Earth asteroidNEOnear-Earth
Although the Moon is Earth's only natural satellite, there are a number of near-Earth objects (NEOs) with orbits that are in resonance with Earth.

Natural satellite

moonmoonssatellite
Claims of the existence of other moons of Earth—that is, of one or more natural satellites that orbit Earth, other than the Moon (Luna)—have existed for some time.

Orbit

orbitsorbital motionplanetary motion
Claims of the existence of other moons of Earth—that is, of one or more natural satellites that orbit Earth, other than the Moon (Luna)—have existed for some time.

Earth

Earth's surfaceterrestrialworld
Claims of the existence of other moons of Earth—that is, of one or more natural satellites that orbit Earth, other than the Moon (Luna)—have existed for some time. , an asteroid discovered on 27 April 2016, is possibly the most stable quasi-satellite of Earth.

Hoax

hoaxesInternet hoaxhoaxer
Since the 19th century, scientists have made genuine searches for more moons, but the possibility has also been the subject of a number of dubious non-scientific speculations as well as a number of likely hoaxes.

Orbital resonance

1:1 resonanceresonancemean-motion resonance
Although the Moon is Earth's only natural satellite, there are a number of near-Earth objects (NEOs) with orbits that are in resonance with Earth.

Asteroid

asteroidsminor bodyMinor Planet
They appear to orbit a point other than Earth itself, such as the orbital path of the NEO asteroid 3753 Cruithne. , an asteroid discovered on 27 April 2016, is possibly the most stable quasi-satellite of Earth.

Quasi-satellite

co-orbital asteroidsquasi-orbits
, an asteroid discovered on 27 April 2016, is possibly the most stable quasi-satellite of Earth.

Small Solar System body

small Solar System bodiessmall bodiesmacroscopic system
Other small natural objects in orbit around the Sun may enter orbit around Earth for a short amount of time, becoming temporary natural satellites.

Toulouse Observatory

ToulouseObservatoire de Toulouse
The first major claim of another moon of Earth was made by French astronomer Frédéric Petit, director of the Toulouse Observatory, who in 1846 announced that he had discovered a second moon in an elliptical orbit around Earth.

Elliptic orbit

elliptical orbitellipticalelliptic
The first major claim of another moon of Earth was made by French astronomer Frédéric Petit, director of the Toulouse Observatory, who in 1846 announced that he had discovered a second moon in an elliptical orbit around Earth.

Toulouse

Toulouse, FranceTolosaToulousain
It was claimed to have also been reported by Lebon and Dassier at Toulouse, and by Larivière at Artenac Observatory, during the early evening of March 21, 1846.

Apsis

perigeeperihelionapogee
Petit proposed that this second moon had an elliptical orbit, a period of 2 hours 44 minutes, with 3570 km apogee and 11.4 km perigee.

Altitude

high altitudealtitudeshigh-altitude
The 11.4 km perigee is similar to the cruising altitude of most modern airliners, and within Earth's atmosphere.

Jules Verne

VerneJules-Vernethe French author
Petit's proposed moon became a plot point in Jules Verne's 1870 science fiction novel Around the Moon.

Around the Moon

Autour de la Lune
Petit's proposed moon became a plot point in Jules Verne's 1870 science fiction novel Around the Moon.

Hamburg

Hamburg, GermanyFree and Hanseatic City of HamburgFree City of Hamburg
In 1898 Hamburg scientist Dr. Georg Waltemath announced that he had located a system of tiny moons orbiting Earth.

Orbital period

periodsynodic periodsynodic
Waltemath described one of the proposed moons as being 1030000 km from Earth, with a diameter of 700 km, a 119-day orbital period, and a 177-day synodic period.

New-York Tribune

New York TribuneThe New York TribuneNew York Daily Tribune
E. Stone Wiggins, a Canadian weather expert, ascribed the cold spring of 1907 to the effect of a second moon, which he said he had first seen in 1882 and had publicized the find in 1884 in the New-York Tribune when he put it forward as probable cause of an anomalous solar eclipse of May of that year.

Scientific community

research communityscientific communitiesscience community
The existence of these objects put forward by Waltemath (and Wiggins) was discredited after the absence of corroborating observation by other members of the scientific community.