Trojan (celestial body) whatever the planet and trojan masses. And if = , then both must exceed 13+√168 ≈ 25.9615. But all this assumes a three-body system: once other bodies are introduced, even if distant and small, stability of the system requires larger ratios. Trojan (celestial body) In astronomy, a trojan is a minor planet or moon that shares the orbit of a planet or larger moon, wherein the trojan remains in the same, stable position relative to the larger object. In particular, a trojan remains near one of the two trojan points of stability – designated and – which lie approximately 60°
Celestial monarch Celestial monarch The celestial monarch ("Hypothymis coelestis") is a species of bird in the family Monarchidae, and one of the most attractive of all the monarch flycatchers, with its spectacular blue crest and large yellow eye-ring (neither of which are illustrated in the facing painting). It is endemic to the Philippines. An alternate name for the celestial monarch is the celestial blue monarch. Two subspecies are recognized: Its natural habitat is subtropical or tropical moist lowland forests. This beautiful insectivore is declining rapidly, with recent surveys revealing its presence at only 10 sites. Widespread and continuing reduction of its lowland