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Dimorphos

Dimorphos (formal designation (65803) Didymos I; provisional designation S/2003 (65803) 1) is a natural satellite or moon of the near-Earth asteroid 65803 Didymos, with which it forms a binary system. The moon was discovered on 20 November 2003 by Petr Pravec in collaboration with other astronomers worldwide. Dimorphos has a diameter of 177 meters (581…

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Absolute magnitude (H)
21.4±0.2[d]
Albedo
0.15±0.02: 6
Alternative names
S/2003 (65803) 1 Didymos B "Didymoon"
Average orbital speed
0.177 m/s (pre-impact)[b]
Designation
Didymos I
Dimensions
177 × 174 × 116 m (± 2 × 4 × 2 m)

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Overview

Discovery

Naming

Origin

Exploration

Size and shape

Orbit and rotation

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Dimorphos

Nodes67
Edges66
Triples121
Avg. degree1.97
Density0.029851
Components1

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Dimorphos

Top relations

related to Exploration · 32
Dimorphos → Applied Physics Laboratory, As, ATLAS, DART, December, Didymos, Dimorphos's, Double Asteroid Redirection Test, Earth, Earth-threatening, ESA, Fifteen, Following, For, Hera, Hubble, Italian Space Agency CubeSat, James Webb, LICIACube, Lucy
related to Naming · 15
Dimorphos → Aristotle University, As, DART, Didymoon, Greek, Hera, IAU, International Astronomical Union, June, Kleomenis Tsiganis, Prior, Small Bodies Nomenclature, The, The Working Group, Thessaloniki
related to Discovery · 14
Dimorphos → Arecibo, Arizona, Czech Republic, Didymos, Didymos's, Doppler, Joe Montani, November, Ondřejov Observatory, Petr Pravec, Spacewatch Project, The, University, With
related to Orbit and rotation · 12
Dimorphos → AU, Didymos, Didymos's, Dimorphos's, Earth, However, Its, October, On, Sun, The, YORP
related to Size and shape · 9
Dimorphos → DART, Didymos, Duende, Giza, Great Pyramid, IAU, It, Kamoʻoalewa, The
related to Origin · 7
Dimorphos → After, Didymos, Didymos's, Madeira, Roche, That, YORP
related to External links · 3
Dimorphos → Media, Wikimedia Commons, Wiktionary-logo-en-v2
Absolute magnitude (H) · 1
Dimorphos → 21.4±0.2[d]
Albedo · 1
Dimorphos → 0.15±0.02: 6
Alternative names · 1
Dimorphos → S/2003 (65803) 1 Didymos B "Didymoon"

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Important terminology

didymos dart impact asteroid system rotation moon spacecraft dimorphos's several orbit shape around mass period diameter space orbital meters mission

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
DimorphosAbsolute magnitude (H)21.4±0.2[d]1.00infobox
DimorphosAlbedo0.15±0.02: 61.00infobox
DimorphosAlternative namesS/2003 (65803) 1 Didymos B "Didymoon"1.00infobox
DimorphosAverage orbital speed0.177 m/s (pre-impact)[b]1.00infobox
DimorphosDesignationDidymos I1.00infobox
DimorphosDimensions177 × 174 × 116 m (± 2 × 4 × 2 m)1.00infobox
DimorphosDiscovered byPetr Pravec et al.[a]1.00infobox
DimorphosDiscovery date20 November 20031.00infobox
DimorphosDiscovery siteOndřejov Observatory1.00infobox
DimorphosEccentricity≈0 (pre-impact): 15 0.021±0.014 or 0.0247±0.0002: 16 (post-impact)1.00infobox
DimorphosInclination169.3°±1.0° with respect to ecliptic[c]1.00infobox
DimorphosMass(1.33±0.30)×109 kg (if density is 0.6–0.7 g/cm3) ≈ 4.3×109 kg (if same density as Didymos): 91.00infobox
DimorphosMean density0.6–0.7 g/cm3 2.40±0.30 g/cm3 (if same as Didymos): 291.00infobox
DimorphosMean diameter151±5 m (volume equivalent)1.00infobox
DimorphosNamed afterGreek word for "having two forms"1.00infobox
DimorphosOrbital period (sidereal)11.921473±0.000044 hr (11h 55m 17.3s ± 0.2s; pre-impact): 28 11.3676±0.0014 hr (11h 22m 03.4s ± 5.0s; post-impact)1.00infobox
DimorphosPronunciation/daɪˈmɔːrfəs/ dy-MOR-fəs1.00infobox
DimorphosSatellite of65803 Didymos1.00infobox
DimorphosSemi-major axis1.206±0.035 km (pre-impact): 28 1.144±0.070 km (post-impact): 51.00infobox
DimorphosSpectral typeS1.00infobox
DimorphosSurface area7.58×104 m21.00infobox
DimorphosSynodic rotation period≈ 11.9 hr (synchronous; pre-impact) chaotic (post-impact)1.00infobox
DimorphosVolume(1.81±0.18)×106 m31.00infobox
Dimorphosis asecond smallest asteroid photographed and visited by a spacecraft0.90text

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