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88611 Teharonhiawako

{{Infobox planet

| minorplanet = yes

| background = #C2E0FF

| image = teharonhiawako-sawiskera hst.jpg

| image_scale =

| caption = Hubble Space Telescope image of Teharonhiawako and its companion Sawiskera, taken in 2010

| discoverer = Deep Ecliptic Survey

| discovery_site =

| discovered = 20 August 2001

| name = 88611 Teharonhiawako

| mpc_name = (88611) Teharonhiawako

| pronounced = {{IPA|moh|d̥ɛhaɺũhjáːɰaɡo|lang}}

| alt_names = {{mp|2001 QT|297}}

| mp_category = TNO{{·}}cubewano
cold

| orbit_ref =  

| observation_arc = 4463 days (12.22 yr)

| uncertainty = 3

| epoch = 13 January 2016 (JD 2457400.5)

| aphelion = {{Convert|45.235|AU|Tm|abbr=on|lk=on}}

| perihelion = {{Convert|42.454|AU|Tm|abbr=on}}

| semimajor = {{Convert|43.845|AU|Tm|abbr=on}}

| eccentricity = 0.031712

| period = 290.32 yr (106041 d)

| inclination = 2.5834°

| asc_node = 304.78°

| arg_peri = 236.43°

| mean_anomaly = 158.44°

| mean_motion = 0.0033949°/day

| satellites = Sawiskera {{IPA|moh|zaɰískɛɺa|}}

| mean_diameter = {{val|220|41|44|u=km}} (combined)
{{val|178|33|36|u= km}} (primary)
{{val|129|24|26|u= km}} (secondary)

| mass = {{val|2.445|e=18|u=kg}}

| density = {{val|1.15|0.87|0.91|u=g/cm3}}

| surface_grav =

| escape_velocity =

| sidereal_day = {{val|4.7526|0.0007|u=h}}

| rot_velocity =

| albedo = {{val|0.145|0.086|0.045}}

| spectral_type =

| abs_magnitude = {{val|6.00|0.13}}
5.8

}}

88611 Teharonhiawako (provisional designation {{mp|2001 QT|197}}) is a trans-Neptunian object and a member of the cold classical Kuiper belt, measuring about 220 km in diameter. It is a binary object, with a large companion named Sawiskera (formally designated (88611) Teharonhiawako I Sawiskera), which at 126 km in diameter is about two-thirds the size of its primary. The two components together are known as the Teharonhiawako–Sawiskera binary system.

Discovery

Teharonhiawako was discovered on August 20, 2001, by the Deep Ecliptic Survey, and Sawiskera was identified a month later.

Naming

The primary is named after Teharonhia꞉wako, a god of maize in the Iroquois creation myth, while the secondary is named after his evil twin brother Sawiskera. The objects were named in 2007.

Binary

Teharonhiawako and Sawiskera is a binary minor planet which orbit each other. Their orbit has the following parameters: semi-major-axis—{{nowrap|27670 ± 120 km}}, period—{{nowrap|828.76 ± 0.22 days}}, eccentricity—{{nowrap|0.2494 ± 0.0021}} and inclination—{{nowrap|144.42 ± 0.35°}}(retrograde). The total system mass is about 2.4{{E-sp|18}} kg.

References

{{Reflist|refs=

{{cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=88611 |title=JPL Small-Body Database Browser: 88611 Teharonhiawako (2001 QT297) |publisher=Jet Propulsion Laboratory |access-date=25 March 2016}}

{{cite web

|author=Marc W. Buie

|author-link=Marc W. Buie

|date=2005-07-11

|title=Orbit Fit and Astrometric record for 88611

|publisher=SwRI (Space Science Department)

|url=http://www.boulder.swri.edu/~buie/kbo/astrom/88611.html

|access-date=2008-09-28}}

{{cite web

|date=6 May 2007

|title=(88611) Teharonhiawako and Sawiskera

|publisher=Johnston's Archive

|author=Wm. Robert Johnston

|url=http://www.johnstonsarchive.net/astro/astmoons/am-88611.html

|access-date=2008-09-28}}

{{cite journal

|title="TNOs are Cool": A survey of the trans-Neptunian region X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations

|author=Vilenius, E.

|author2=Kiss, C.

|author3=Mommert, M.

|year=2014

|journal=Astronomy & Astrophysics

|pages=A35

|volume=564

|doi= 10.1051/0004-6361/201322416

|arxiv=1403.6309

|display-authors=etal

|bibcode = 2014A&A...564A..35V }}

{{cite journal

|title= "TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel>/PACS observations and thermal modeling of 19 classical Kuiper belt objects

|author=Vilenius, E.

|author2=Kiss, C.

|author3=Mommert, M.

|year=2014

|journal=Astronomy & Astrophysics

|pages=A94

|volume=541

|doi= 10.1051/0004-6361/201118743

|arxiv=1204.0697

|display-authors=etal

|bibcode = 2012A&A...541A..94V }}

Mike Brown's "How many dwarf planets are there in the outer solar system?" {{Cite web |url=http://www.gps.caltech.edu/~mbrown/dps.html |title=How many dwarf planets are there in the outer solar system? (updates daily) |access-date=2018-02-13 |archive-url=https://web.archive.org/web/20131015110203/http://www.gps.caltech.edu/~mbrown/dps.html |archive-date=2013-10-15 |url-status=bot: unknown }}

{{Cite journal | last1 = Grundy | first1 = W. M. | last2 = Noll | first2 = K. S. | last3 = Nimmo | first3 = F. | last4 = Roe | first4 = H. G. | last5 = Buie | first5 = M. W. | last6 = Porter | first6 = S. B. | last7 = Benecchi | first7 = S. D. | last8 = Stephens | first8 = D. C. | last9 = Levison | first9 = H. F. | doi = 10.1016/j.icarus.2011.03.012 | last10 = Stansberry | first10 = J. A. | title = Five new and three improved mutual orbits of transneptunian binaries | journal = Icarus | volume = 213 | issue = 2 | pages = 678 | date = 2011 | format = pdf| url = http://es.ucsc.edu/~fnimmo/website/Grundy_KBO.pdf|bibcode = 2011Icar..213..678G |arxiv = 1103.2751 }}

}}

External links

  • {{AstDys|88611}}
  • {{JPL small body|id=88611}}

{{Minor planets navigator| |number=88611 | }}

{{Small Solar System bodies}}

{{Trans-Neptunian objects}}

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Category:Named minor planets

Category:Binary trans-Neptunian objects

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