88611 Teharonhiawako (provisional designation 2001 QT197) 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.[7] The two components together are known as the Teharonhiawako–Sawiskera binary system.
 Hubble Space Telescope image of Teharonhiawako and its companion Sawiskera, taken in 2010 | |
| Discovery | |
|---|---|
| Discovered by | Deep Ecliptic Survey |
| Discovery date | 20 August 2001 |
| Designations | |
| (88611) Teharonhiawako | |
| Pronunciation | Mohawk: [d̥ɛhaɺũhjáːɰaɡo] |
| 2001 QT297 | |
| TNO · 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 [zaɰískɛɺa] |
| Physical characteristics | |
| 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] | |
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.[7]
Binary
Teharonhiawako and Sawiskera is a binary minor planet which orbit each other. Their 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
External links
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