88611 Teharonhiawako

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
88611 Teharonhiawako
Discovery
Discovered by Deep Ecliptic Survey
Discovery date 20 August 2001
Designations
MPC designation (88611) Teharonhiawako
Pronunciation Mohawk: [dɛhaɺũhjáːɰaɡo]
2001 QT297
cubewano[1]
(cold)[2]
Orbital characteristics[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc 4463 days (12.22 yr)
Aphelion 45.235 AU (6.7671 Tm)
Perihelion 42.454 AU (6.3510 Tm)
43.845 AU (6.5591 Tm)
Eccentricity 0.031712
290.32 yr (106041 d)
158.44°
0.0033949°/day
Inclination 2.5834°
304.78°
236.43°
Known satellites Sawiskera
Earth MOID 41.4583 AU (6.20207 Tm)
Jupiter MOID 37.0149 AU (5.53735 Tm)
Physical characteristics
Dimensions 220+41
−44
 km
(combined)
178+33
−36
 km
(primary)
129+24
−26
 km
(secondary)[4]
Mass 2.445×1018 kg[5]
Mean density
1.15+0.87
−0.91
 g/cm3
[4]
4.7526±0.0007 h[6]
0.145+0.086
−0.045
[4]
6.00±0.13,[6] 5.8[3]

88611 Teharonhiawako 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 (pronounced [zaɰískɛɺa] in Mohawk, formally designed (88611) Teharonhiawako I Sawiskera), which at 126 km in diameter is about two-thirds the size of its primary.[7]

Teharonhiawako was discovered on August 20, 2001, by the Deep Ecliptic Survey, and Sawiskera was identified a month later, 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.[7]

Sawiskera's orbit has the following parameters: semi-major-axis—27670 ± 120 km, period—828.76 ± 0.22 days, eccentricity—0.2494 ± 0.0021 and inclination—144.42 ± 0.35°(retrograde). The total system mass is about 2.4 × 1018 kg.[5]

References[edit]

  1. ^ Marc W. Buie (2005-07-11). "Orbit Fit and Astrometric record for 88611". SwRI (Space Science Department). Retrieved 2008-09-28. 
  2. ^ Mike Brown's "How many dwarf planets are there in the outer solar system?" Archived 2013-10-15 at the Wayback Machine.
  3. ^ a b "JPL Small-Body Database Browser: 88611 Teharonhiawako (2001 QT297)". Jet Propulsion Laboratory. Retrieved 25 March 2016. 
  4. ^ a b c Vilenius, E.; Kiss, C.; Mommert, M.; et al. (2014). ""TNOs are Cool": A survey of the trans-Neptunian region X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations". Astronomy & Astrophysics. 564: A35. arXiv:1403.6309Freely accessible. Bibcode:2014A&A...564A..35V. doi:10.1051/0004-6361/201322416. 
  5. ^ a b Grundy, W. M.; Noll, K. S.; Nimmo, F.; Roe, H. G.; Buie, M. W.; Porter, S. B.; Benecchi, S. D.; Stephens, D. C.; Levison, H. F.; Stansberry, J. A. (2011). "Five new and three improved mutual orbits of transneptunian binaries" (pdf). Icarus. 213 (2): 678. arXiv:1103.2751Freely accessible. Bibcode:2011Icar..213..678G. doi:10.1016/j.icarus.2011.03.012. 
  6. ^ a b Vilenius, E.; Kiss, C.; Mommert, M.; et al. (2014). ""TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel>/PACS observations and thermal modeling of 19 classical Kuiper belt objects". Astronomy & Astrophysics. 541: A94. arXiv:1204.0697Freely accessible. Bibcode:2012A&A...541A..94V. doi:10.1051/0004-6361/201118743. 
  7. ^ a b Wm. Robert Johnston (6 May 2007). "(88611) Teharonhiawako and Sawiskera". Johnston's Archive. Retrieved 2008-09-28. 

External links[edit]