asteroid 944 Hidalgo

E92942

asteroid centaur (small Solar System body) comet-like object minor planet outer Solar System object

Asteroid 944 Hidalgo is a large, eccentric, comet-like minor planet that orbits between the inner and outer solar system, making it one of the first known centaur objects.

Aliases (1)

944 Hidalgo ×45

Statements (45)

Predicate	Object
instanceOf	asteroid → centaur (small Solar System body) → comet-like object → minor planet → outer Solar System object →
belongsToDynamicalClass	centaur →
belongsToPopulation	small Solar System bodies →
crossesPlanetaryRegion	inner Solar System → outer Solar System →
hasAbsoluteMagnitude	10.1 →
hasAlbedo	0.04 →
hasAphelionDistance	9.53 AU →
hasAphelionNear	orbit of Saturn →
hasApproximateDiameter	61 km →
hasArgumentOfPerihelion	57 degrees (approximate) →
hasColorIndex	very red (typical of D-type) →
hasComet-likeOrbit	true →
hasDiscoveryDate	1920-10-31 →
hasDiscoveryDesignation	1920 H →
hasHighlyEccentricOrbit	true →
hasInclination	42.5 degrees →
hasLongitudeOfAscendingNode	21 degrees (approximate) →
hasMeanAnomaly	0.0 degrees (at epoch, approximate) →
hasMinorPlanetNumber	944 →
hasName	Hidalgo →
hasObservationArc	over 100 years →
hasOrbitalEccentricity	0.66 →
hasOrbitalPeriod	13.76 years →
hasOrbitCrossing	Jupiter’s orbit →
hasPerihelionDistance	1.95 AU →
hasPerihelionInside	asteroid belt region →
hasPotentialEvolution	short-period comet (hypothesized future evolution) →
hasRotationPeriod	10.1 hours →
hasSemiMajorAxis	5.74 AU →
hasSpectralType	D-type asteroid →
hasSurfaceComposition	carbon-rich (inferred from D-type spectrum) →
hasTisserandParameterWithRespectToJupiter	2.1 →
interactsGravitationallyWith	Jupiter →
isDynamicallyUnstable	true →
isNamedAfter	Miguel Hidalgo y Costilla →
mayHaveOrigin	Kuiper belt or trans-Neptunian region (hypothesized) →
orbits	Sun →
wasDiscoveredAt	Bergedorf Observatory →
wasDiscoveredBy	Walter Baade →
wasFirstOfType	one of the first known centaurs →

Referenced by (1)

Subject (surface form when different)	Predicate
Walter Baade →	discovered