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Ilmarë

Ilmarë, formal designation (174567) Varda I, is the only known moon of the large Kuiper belt object 174567 Varda. It was discovered by Keith Noll et al. in 2009, at a separation of about 0.12 arcsec, using discovery images taken by the Hubble Space Telescope on 26 April 2009, and reported in 2011.

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Absolute magnitude (H)
Varda + 1.7
Adjectives
Ilmarëan /ɪlməˈriːən/
Albedo
0.068±0.011 (2025) ≈0.085 (2020)
Alternative names
(174567) Varda I
Designation
Varda I
Discovered by
Keith S. Noll et al.

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Overview

Observational history

Nomenclature

Orbit

Physical characteristics

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Ilmarë

Nodes44
Edges43
Triples74
Avg. degree1.95
Density0.045455
Components1

How this topic connects Entity context

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Ilmarë

Top relations

related to Discovery · 17
Ilmarë → Although, April, Benecchi, Buie, Chad Trujillo, EPSC-DPS Joint Meeting, Grundy, Hubble Space Telescope, Keith, Noll, October, Porter, Roe, Stansberry, The, Varda, William
related to Further observations · 9
Ilmarë → Along, Astronomers, ATLAS, Automated, On, Pan-STARRS, September, Varda, Zwicky Transient Facility
related to Nomenclature · 8
Ilmarë → IPA-label-small, January, Maiar, Names, Quenya, Tolkien's, Valar, Varda
related to Tidal evolution · 7
Ilmarë → Furthermore, If Varda, Observations, Salacia-Actaea, This, Varda, Varda's
related to Orbital characteristics · 6
Ilmarë → In, It, Its, Neptunian, The, Varda
see also · 5
Ilmarë → Actaea, Haumea, Ilmarë Hiʻiaka, Neptunian, Salacia
related to Older estimates for Ilmarë's physical characteristics · 4
Ilmarë → Because, If, If Ilmarë, Varda
Absolute magnitude (H) · 1
Ilmarë → Varda + 1.7
Adjectives · 1
Ilmarë → Ilmarëan /ɪlməˈriːən/
Albedo · 1
Ilmarë → 0.068±0.011 (2025) ≈0.085 (2020)

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Important terminology

varda moon km size albedo density mass system trans-neptunian cm3 orbital discovery approximately would known object keith noll lower ratio

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
IlmarëAbsolute magnitude (H)Varda + 1.71.00infobox
IlmarëAdjectivesIlmarëan /ɪlməˈriːən/1.00infobox
IlmarëAlbedo0.068±0.011 (2025) ≈0.085 (2020)1.00infobox
IlmarëAlternative names(174567) Varda I1.00infobox
IlmarëDesignationVarda I1.00infobox
IlmarëDiscovered byKeith S. Noll et al.1.00infobox
IlmarëDiscovery date2009, based on images taken on 26 April 20091.00infobox
IlmarëEccentricity0.016±0.0041.00infobox
IlmarëInclination77.4±1.91.00infobox
IlmarëMass≈2.2×1019 kg (2015) ~16% of Varda (2025)[a] ~11% of Varda (2025)[b]1.00infobox
IlmarëMean density1.24+0.50 −0.35 g/cm3 (system)[c] 0.7 g/cm3[d] 1.15 g/cm3[e]1.00infobox
IlmarëMean diameter403±40 km1.00infobox
IlmarëNamed afterIlmarë (figure by J. R. R. Tolkien)1.00infobox
IlmarëOrbital period (sidereal)5.750824±0.000016 d1.00infobox
IlmarëPronunciation/ˈɪlməriː/1.00infobox
IlmarëSatellite ofVarda1.00infobox
IlmarëSemi-major axis4815±29 km1.00infobox
IlmarëSpectral typeB−V = 0.857±0.061 V−I = 1.266±0.0521.00infobox

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