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Asteroids with Satellites Database--Johnston's Archive
(469705) |Kagaraand !Haunu
compiled by Wm. Robert Johnston
last updated9 October 2021--Orbital and physical data--
(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:TNO, Cubewano
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 43.8291 AU | | orbital periodP: | 290.1642 yr
(= 105984.6 d) | | eccentricitye: | 0.087176 | | perihelion distanceq: | 40.00826 AU | | aphelion distanceQ: | 47.65 AU | | inclinationi: | 2.869393° | | argument of perihelionω: | 78.6849° | | ascending nodeΩ: | 118.0931° | | mean anomalyM: | 339.5756° | | perihelion passageTP: | 2037 Jun 04.0 | | Epoch: | 2020 Dec 17 | | data arc: | 2005-2020(222 obs.) | | Earth MOID: | 39.0076 AU | | Jupiter Tisserand invariantTJ: | 5.894 | | Neptune Tisserand invariantTN: | 3.088 [*D] |
orbital data, secondary: | semimajor axisas: | 7670± 140 km[G19b] | | separation/primary radiusas/rp: | 110 [*D] | | separation/Hill radiusas/rH: | 0.018 [*D] | | orbital periodPs: | 128.107± 0.027d [G19b] | | eccentricityes: | 0.694± 0.013[G19b] | | inclinationis: | 33.33° ± 0.41° [G19b] | | ascending nodeΩs: | 4.13° ± 0.32° [G19b] | | argument of pericenterωs: | 183.57° ± 0.76° [G19b] | | mean anomalyM: | 136.08° ± 0.88° [G19b] | | Epoch: | 2011 Feb 07.5 | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 6.16[MPC]
6.4 ± 0.5 [V12a] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 174± 27/32 km [V12a] | | geometric albedo: | 0.16± 0.13/0.07[V12a] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | 2.18x1018 ± 1.2x1017kg [G19b] | | densityρ: | 1.1± 0.61 g/cm3[K17b] | | Hill radiusrH: | 430000 km [*E] |
other data, primary: | diameterdp: | 138 km [*E] | | rotation periodRPp: | 9.65h [B13a] | | amplitude in mag., rotationalΔM: | 0.31± 0.04 [B13a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 105km [*E] | | diameter ratiods/dp: | 0.762 [G12b] | | component mag. differenceΔM: | 0.59 [G12b] | | rotation periodRPs: | ? | |
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--(469705) |Kagara and !Haunu --discovery and notes:
Primary discovered2005 Mar 11from Kitt Peak Observatory, Arizona, USAby M. W. Buie.Alternate designation(s):2005 EF298.Permanent number assigned 2016 Aug 18.
Named 2021 Jun 16 for the Xam mythological character [WGSBN0103].
Companion discovered2009 Jan 21usingHubble Space Telescope observations from Hubble Space Telescope.Announced2011.Permanent designation !Haunu, assigned 2021 Jun 16; named for the Xam mythological character [].
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--Links to ADS abstracts:
©2011-2019, 2021by Wm. Robert Johnston.
Last modified9 October 2021.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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