You are about to undo an edit. Please check the comparison below to verify that this is what you want to do, then publish the changes below to finish undoing the edit. If you are undoing an edit that is not vandalism, explain the reason in the edit summary. Do not use the default message only. |
Latest revision | Your text | ||
Line 1: | Line 1: | ||
{{Short description|Larger moon of Haumea}} |
|||
⚫ | |||
{{Infobox planet |
{{Infobox planet |
||
| name = |
| name = Hiʻiaka |
||
| image = Haumea |
| image = [[File:2003 EL61 Haumea, with moons.jpg|275px]] |
||
| caption = Hiʻiaka is above Haumea (center) in this [[Keck telescope]] image. |
|||
| caption = In this series of photos taken by the [[Hubble Space Telescope]], the brighter object Hi{{okina}}iaka is seen orbiting [[Haumea]] (center). |
|||
| discovery = yes |
|||
| discoverer = [[Michael E. Brown]], <br> [[Chad Trujillo]], <br> [[David Rabinowitz]], et al. |
| discoverer = [[Michael E. Brown]], <br> [[Chad Trujillo]], <br> [[David Rabinowitz]], et al. |
||
| discovered = 26 January 2005 |
| discovered = 26 January 2005 |
||
| |
| mp_name = Haumea I Hiʻiaka |
||
| alt_names = {{mp|(136108) 2003 EL|61}} I<br>{{mp|S|2005|2003 EL|61|1}} |
| alt_names = {{mp|(136108) 2003 EL|61}} I, <br>{{mp|S|2005|2003 EL|61|1}} |
||
| pronounced = {{IPAc-en|h|iː|ʔ|i|ˈ|ɑː|k|ə}}< |
| pronounced = {{IPAc-en|ˌ|h|iː|ʔ|i|ˈ|ɑː|k|ə}}<ref name=dict-def/> |
||
| orbit_ref = <ref name=RagozzineBrown2009/> |
| orbit_ref = <ref name=RagozzineBrown2009/> |
||
| semimajor = {{val|49880|198|ul=km}} |
| semimajor = {{val|49880|198|ul=km}} |
||
Line 15: | Line 14: | ||
| period = {{val|49.12|0.03|u=days}} |
| period = {{val|49.12|0.03|u=days}} |
||
| inclination = {{val|126.356|0.064|s=°}} |
| inclination = {{val|126.356|0.064|s=°}} |
||
| asc_node = {{val|206.766|0.033|u=°}} |
|||
| arg_peri = {{val|154.1|5.8|u=°}} |
|||
| mean_anomaly = {{val|152.8|6.1|u=°}} |
|||
| satellite_of = {{dp|Haumea}} |
| satellite_of = {{dp|Haumea}} |
||
| physical_characteristics = yes |
|||
| mean_radius = {{val|p=~|160|u=km}}<ref name=RagozzineBrown2009/> |
| mean_radius = {{val|p=~|160|u=km}}<ref name=RagozzineBrown2009/> |
||
| mass = {{val|1.79|0.11|e=19|ul=kg}}<ref name=RagozzineBrown2009/> (0.45% of Haumea) |
| mass = {{val|1.79|0.11|e=19|ul=kg}}<ref name=RagozzineBrown2009/> (0.45% of Haumea) |
||
| density = {{val|p=~|1|ul=g/cm3}} |
| density = {{val|p=~|1|ul=g/cm3}} |
||
| single_temperature = {{val|32|3|ul=K}} |
| single_temperature = {{val|32|3|ul=K}} |
||
| rotation = |
| rotation = |
||
| axial_tilt = |
| axial_tilt = |
||
| albedo = |
|||
| albedo = {{val|0.8|0.07}}<ref name=johnston/><ref name=RagozzineBrown2009/> |
|||
| magnitude = |
| magnitude = 3.3 difference from primary's 17.3 |
||
}} |
}} |
||
'''Hiʻiaka''' is the larger, outer [[moons of Haumea|moon of]] the [[dwarf planet]] [[Haumea]]. |
|||
'''Hi{{okina}}iaka''' is the larger, outer moon of the trans-Neptunian [[dwarf planet]] [[Haumea]]. It is named after one of the daughters of [[Haumea (mythology)|Haumea]], [[Hi{{okina}}iaka]], the patron goddess of the [[Big Island of Hawaii]]. It orbits once every {{val|49.12|0.03|u=days}} at a distance of {{val|49880|198|ul=km}}, with an eccentricity of {{val|0.0513|0.0078}} and an inclination of {{val|126.356|0.064|s=°}}. Assuming its estimated diameter of over 300 km is accurate, it may be the fourth- or fifth-largest known moon of a Trans-Neptunian object, after [[Pluto I Charon]], [[Eris I Dysnomia]], [[Orcus I Vanth]], and possibly [[Varda I Ilmarë]] and [[Salacia I Actaea]]. |
|||
==Discovery== |
== Discovery and naming == |
||
|
Hiʻiaka was the first [[natural satellite|satellite]] discovered around Haumea. It is named after one of the daughters of [[Haumea (mythology)|Haumea]], [[Hiʻiaka]], the patron goddess of the [[Big Island of Hawaii]], though at first it had gone by the nickname "[[Rudolph the Red-Nosed Reindeer|Rudolph]]" by its discovery team. It orbits once every {{val|49.12|0.03|u=days}} at a distance of {{val|49880|198|ul=km}}, withaneccentricity of {{val|0.0513|0.0078}} and an inclination of {{val|126.356|0.064|s=°}}. Mutual events expected in July 2009 should improve the knowledge of the orbits and masses of the components of the Haumean system.<ref name=RagozzineBrown2009/> |
||
== Physical characteristics == |
== Physical characteristics == |
||
=== Size and brightness === |
=== Size and brightness === |
||
Its measured brightness is {{val|5.9|0.5|s=%}}, translating into a diameter of about 22% of its primary, or in the range of {{val|320|u=km}}, assuming similar |
Its measured brightness is {{val|5.9|0.5|s=%}}, translating into a diameter of about 22% of its primary, or in the range of {{val|320|u=km}}, assuming similar albedo.<ref name=RagozzineBrown2009/> To put this in perspective, this would make it larger than all but [[List of notable asteroids#Largest by diameter|four]] of the asteroids, after [[1 Ceres]], [[2 Pallas]], [[4 Vesta]], and [[10 Hygiea]]. However, it is not a dwarf-planet candidate because it is a moon. |
||
=== Mass === |
=== Mass === |
||
The mass of |
The mass of Hiʻiaka is estimated to be {{val|1.79|0.11|e=19|ul=kg}} using precise relative [[astrometry]] from [[Hubble Telescope]] and [[Keck Telescope]] and applying [[3-body problem|3-body]], point-mass model to the Haumean system.<ref name=RagozzineBrown2009/> |
||
=== Spectrum and composition === |
=== Spectrum and composition === |
||
The near infrared spectrum of |
The near infrared spectrum of Hiʻiaka is dominated by water-ice absorption bands, which means that its surface is made mainly of water ice. The presence of the band centered at {{val|1.65|u=μm}} indicates that the surface water ice is primarily in the [[crystalline]] form. Currently it is unclear why water ice on the surface has not turned into [[amorphous]] form as would be expected due to its constant irradiation by [[cosmic ray]]s.<ref name=Dumas2011/> |
||
==See also== |
== See also == |
||
*[[Namaka (moon) |
* [[Namaka (moon)]] |
||
⚫ | |||
==Notes== |
|||
{{reflist |
{{reflist |
||
| |
| refs = |
||
}} |
|||
⚫ | |||
{{notelist}} |
|||
The [[Hawaiian language|Hawaiian]] pronunciation is {{IPA-haw|ˈhiʔiˈjɐkə|}}. |
|||
</ref> |
|||
⚫ | |||
{{Reflist|30em| refs = |
|||
<ref name="RagozzineBrown2009"> |
<ref name="RagozzineBrown2009"> |
||
{{cite journal| doi = 10.1088/0004-6256/137/6/4766| last1 = Ragozzine| first1 = D.| last2 = Brown| first2 = M. E.| year = 2009| title = Orbits and Masses of the Satellites of the Dwarf Planet Haumea (2003 EL61)| journal = The Astronomical Journal| volume = 137| issue = 6| pages = |
{{cite journal| doi = 10.1088/0004-6256/137/6/4766| last1 = Ragozzine| first1 = D.| last2 = Brown| first2 = M. E.| year = 2009| title = Orbits and Masses of the Satellites of the Dwarf Planet Haumea (2003 EL61)| journal = The Astronomical Journal| volume = 137| issue = 6| pages = 4766| pmid = | pmc = | arxiv = 0903.4213| bibcode = 2009AJ....137.4766R| ref = harv}} |
||
</ref> |
</ref> |
||
<ref name="Dumas2011"> |
|||
|
{{Cite journal | last1 = Dumas | first1 = C.| last2 = Carry | first2 = B.| last3 = Hestroffer | first3 = D.| last4 = Merlin | first4 = F.| title = High-contrast observations of (136108) Haumea | doi = 10.1051/0004-6361/201015011 | journal = Astronomy & Astrophysics | volume = 528 | pages = A105 | year = 2011 | pmid = | pmc = |bibcode = 2011A&A...528A.105D |arxiv = 1101.2102 }} |
||
⚫ | |||
{{cite web |
|||
| url = http://www.johnstonsarchive.net/astro/astmoons/am-136108.html |
|||
| author = Wm. Robert Johnston |
|||
| title = (136108) Haumea, Hiʻiaka, and Nāmaka |
|||
| date = 17 September 2008 |
|||
| access-date = 2008-09-18 |
|||
}} |
|||
</ref> |
</ref> |
||
<ref name="Hastings2016">{{cite journal |
|||
|title = The Short Rotation Period of Hiʻiaka, Haumea's Largest Satellite |
|||
|last1 = Hastings |first1 = Danielle M. |
|||
|last2 = Ragozzine |first2 = Darin |
|||
|last3 = Fabrycky |first3 = Daniel C. |
|||
|last4 = Burkhart |first4 = Luke D. |
|||
|last5 = Fuentes |first5 = Cesar |
|||
|last6 = Margot |first6 = Jean-Luc |
|||
|last7 = Brown |first7 = Michael E. |
|||
|last8 = Holman |first8 = Matthew |
|||
|date = December 2016 |
|||
|journal = The Astronomical Journal |
|||
|volume = 152 |
|||
|issue = 6 |
|||
|id = 195 |
|||
|pages = 12 |
|||
|doi = 10.3847/0004-6256/152/6/195 |
|||
|arxiv = 1610.04305 |
|||
|bibcode = 2016AJ....152..195H |
|||
|oclc = 6889796157 |
|||
|osti = 22662917|s2cid = 33292771 |doi-access = free }}</ref> |
|||
}} |
}} |
||
==External links== |
== External links == |
||
* [http://www.gps.caltech.edu/%7Embrown/papers/ps/EL61.pdf Brown's publication describing the discovery of |
* [http://www.gps.caltech.edu/%7Embrown/papers/ps/EL61.pdf Brown's publication describing the discovery of Hiʻiaka] |
||
* [http://www.gps.caltech.edu/~mbrown/papers/ps/rudolph.pdf Paper describing the composition of |
* [http://www.gps.caltech.edu/~mbrown/papers/ps/rudolph.pdf Paper describing the composition of Hiʻiaka] |
||
⚫ | |||
{{Haumea}} |
{{Haumea}} |
||
{{Solar System moons (compact)}} |
{{Solar System moons (compact)}} |
||
⚫ | |||
⚫ | |||
⚫ | |||
{{DEFAULTSORT:Hi'iaka (moon)}} |
{{DEFAULTSORT:Hi'iaka (moon)}} |
||
[[Category:Moons of Haumea]] |
[[Category:Moons of Haumea]] |
||
⚫ | |||
[[Category:Discoveries by Michael E. Brown]] |
[[Category:Discoveries by Michael E. Brown]] |
||
[[Category:Astronomical objects discovered in 2005|20050126]] |
|||
[[Category:Discoveries by Chad Trujillo]] |
[[Category:Discoveries by Chad Trujillo]] |
||
[[Category:Discoveries by David L. Rabinowitz]] |
[[Category:Discoveries by David L. Rabinowitz]] |
||
[[Category:Objects observed by stellar occultation]] |
Copy and paste: – — ° ′ ″ ≈ ≠ ≤ ≥ ± − × ÷ ← → · § Cite your sources: <ref></ref>
{{}} {{{}}} | [] [[]] [[Category:]] #REDIRECT [[]] <s></s> <sup></sup> <sub></sub> <code></code> <pre></pre> <blockquote></blockquote> <ref></ref> <ref name="" /> {{Reflist}} <references /> <includeonly></includeonly> <noinclude></noinclude> {{DEFAULTSORT:}} <nowiki></nowiki> <!-- --> <span class="plainlinks"></span>
Symbols: ~ | ¡ ¿ † ‡ ↔ ↑ ↓ • ¶ # ∞ ‹› «» ¤ ₳ ฿ ₵ ¢ ₡ ₢ $ ₫ ₯ € ₠ ₣ ƒ ₴ ₭ ₤ ℳ ₥ ₦ № ₧ ₰ £ ៛ ₨ ₪ ৳ ₮ ₩ ¥ ♠ ♣ ♥ ♦ 𝄫 ♭ ♮ ♯ 𝄪 © ® ™
Latin: A a Á á À à  â Ä ä Ǎ ǎ Ă ă Ā ā à ã Å å Ą ą Æ æ Ǣ ǣ B b C c Ć ć Ċ ċ Ĉ ĉ Č č Ç ç D d Ď ď Đ đ Ḍ ḍ Ð ð E e É é È è Ė ė Ê ê Ë ë Ě ě Ĕ ĕ Ē ē Ẽ ẽ Ę ę Ẹ ẹ Ɛ ɛ Ǝ ǝ Ə ə F f G g Ġ ġ Ĝ ĝ Ğ ğ Ģ ģ H h Ĥ ĥ Ħ ħ Ḥ ḥ I i İ ı Í í Ì ì Î î Ï ï Ǐ ǐ Ĭ ĭ Ī ī Ĩ ĩ Į į Ị ị J j Ĵ ĵ K k Ķ ķ L l Ĺ ĺ Ŀ ŀ Ľ ľ Ļ ļ Ł ł Ḷ ḷ Ḹ ḹ M m Ṃ ṃ N n Ń ń Ň ň Ñ ñ Ņ ņ Ṇ ṇ Ŋ ŋ O o Ó ó Ò ò Ô ô Ö ö Ǒ ǒ Ŏ ŏ Ō ō Õ õ Ǫ ǫ Ọ ọ Ő ő Ø ø Œ œ Ɔ ɔ P p Q q R r Ŕ ŕ Ř ř Ŗ ŗ Ṛ ṛ Ṝ ṝ S s Ś ś Ŝ ŝ Š š Ş ş Ș ș Ṣ ṣ ß T t Ť ť Ţ ţ Ț ț Ṭ ṭ Þ þ U u Ú ú Ù ù Û û Ü ü Ǔ ǔ Ŭ ŭ Ū ū Ũ ũ Ů ů Ų ų Ụ ụ Ű ű Ǘ ǘ Ǜ ǜ Ǚ ǚ Ǖ ǖ V v W w Ŵ ŵ X x Y y Ý ý Ŷ ŷ Ÿ ÿ Ỹ ỹ Ȳ ȳ Z z Ź ź Ż ż Ž ž ß Ð ð Þ þ Ŋ ŋ Ə ə
Greek: Ά ά Έ έ Ή ή Ί ί Ό ό Ύ ύ Ώ ώ Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ Σ σ ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω {{Polytonic|}}
Cyrillic: А а Б б В в Г г Ґ ґ Ѓ ѓ Д д Ђ ђ Е е Ё ё Є є Ж ж З з Ѕ ѕ И и І і Ї ї Й й Ј ј К к Ќ ќ Л л Љ љ М м Н н Њ њ О о П п Р р С с Т т Ћ ћ У у Ў ў Ф ф Х х Ц ц Ч ч Џ џ Ш ш Щ щ Ъ ъ Ы ы Ь ь Э э Ю ю Я я ́
IPA: t̪ d̪ ʈ ɖ ɟ ɡ ɢ ʡ ʔ ɸ β θ ð ʃ ʒ ɕ ʑ ʂ ʐ ç ʝ ɣ χ ʁ ħ ʕ ʜ ʢ ɦ ɱ ɳ ɲ ŋ ɴ ʋ ɹ ɻ ɰ ʙ ⱱ ʀ ɾ ɽ ɫ ɬ ɮ ɺ ɭ ʎ ʟ ɥ ʍ ɧ ʼ ɓ ɗ ʄ ɠ ʛ ʘ ǀ ǃ ǂ ǁ ɨ ʉ ɯ ɪ ʏ ʊ ø ɘ ɵ ɤ ə ɚ ɛ œ ɜ ɝ ɞ ʌ ɔ æ ɐ ɶ ɑ ɒ ʰ ʱ ʷ ʲ ˠ ˤ ⁿ ˡ ˈ ˌ ː ˑ ̪ {{IPA|}}
Wikidata entities used in this page
Pages transcluded onto the current version of this page (help):
This page is a member of 4 hidden categories (help):