88611 Teharonhiawako
88611 Teharonhiawako, or (88611) Teharonhiawako–Sawiskera as a binary,[5] 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]
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 | |
Mean diameter | 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 Edit
Teharonhiawako was discovered on August 20, 2001, by the Deep Ecliptic Survey, and Sawiskera was identified a month later.
Naming Edit
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 Edit
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 Edit
- ^ Marc W. Buie (2005-07-11). "Orbit Fit and Astrometric record for 88611". SwRI (Space Science Department). Retrieved 2008-09-28.
- ^ Mike Brown's "How many dwarf planets are there in the outer solar system?" . Archived from the original on 2013-10-15. Retrieved 2018-02-13.
{{cite web}}: CS1 maint: bot: original URL status unknown (link) - ^ a b "JPL Small-Body Database Browser: 88611 Teharonhiawako (2001 QT297)". Jet Propulsion Laboratory. Retrieved 25 March 2016.
- ^ 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:1403.6309. Bibcode:2014A&A...564A..35V. doi:10.1051/0004-6361/201322416.
- ^ a b c 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:1103.2751. Bibcode:2011Icar..213..678G. doi:10.1016/j.icarus.2011.03.012.
- ^ 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:1204.0697. Bibcode:2012A&A...541A..94V. doi:10.1051/0004-6361/201118743.
- ^ a b Wm. Robert Johnston (6 May 2007). "(88611) Teharonhiawako and Sawiskera". Johnston's Archive. Retrieved 2008-09-28.
External links Edit
- 88611 Teharonhiawako at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 88611 Teharonhiawako at the JPL Small-Body Database