2001 QW322

Asteroids with Satellites Database--Johnston's Archive

2001 QW322

compiled by Wm. Robert Johnston
last updated 20 September 2014

--Orbital and physical data--

(See this page for definitions of quantities; source codes in brackets, see this 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 axis a: 43.846 AU
orbital period P: 290.337 yr
(= 106045.6 d)
eccentricity e: 0.0264
perihelion distance q: 42.689 AU
aphelion distance Q: 45.003 AU
inclination i: 4.8169°
argument of perihelion ω: 68.48°
ascending node Ω: 124.7247°
mean anomaly M: 126.17°
perihelion passage T_P: 1912 Aug 20
Epoch: 2014 May 23
data arc: 2001-2004 (53 obs.)
Earth MOID: 41.6926 AU
Jupiter Tisserand invariant T_J: 5.902

Neptune Tisserand invariant T_N: 3.09 [*D]

orbital data, secondary:

semimajor axis a_s: 102100 ± 700 km [G14a]
separation/primary radius a_s/r_p: 1600 [*D]
separation/Hill radius a_s/r_H: 0.225 [*D]
orbital period P_s: 6280 ± 70 d [G14a]
eccentricity e_s: 0.464 ± 0.005 [G14a]
inclination i_s: 150.7° ± 0.6° [P08a]
ascending node Ω_s: 243° ± 3.5° [P11a]
argument of pericenter ω_s: 257° ± 7.5° [P11a]
mean anomaly M: 158° ± 14.5° [P11a]
Epoch: 2001 Jul 27.42
normalized ang. mom. α_L: ?

other data, system (combined):

absolute mag. H: 7.8 [MPC]
7.51 [P11a]
slope parameter G: (0.15) [*A]
effective diameter d_E: 180 km [*D]
geometric albedo: 0.093 ± 0.008 [P11a]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: 2.15x10¹⁸ ± 1.84x10¹⁷ kg [P11a]
density ρ: 1 ± 0.2/0.2 g/cm³[P08a]
Hill radius r_H: 450000 km [*D]
other data, primary:

diameter d_p: 128 ± 2/4 km [P11a]
rotation period RP_p: ?
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?

other data, secondary:

diameter d_s: 126 ± 3/5 km [*D]
diameter ratio d_s/d_p: 0.986 ± 0.018 [P11a]
component mag. difference ΔM: 0.03 ± 0.02 [P08a]
rotation period RP_s: ?

-- 2001 QW322 --discovery and notes:

Primary discovered 2001 Aug 24 from Mauna Kea Observatory, Hawaii, USA by ?.

Companion discovered 2001 Aug 24 using adaptive optics telescope observations. Announced 2001 Nov 09.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

Parker, Alex H., Kavelaars, J. J., Petit, Jean-Marc, Jones, Lynne, Gladman, Brett, & Parker, Joel 2011, The Astrophysical Journal Characterization of Seven Ultra-wide Trans-Neptunian Binaries
Nesvorny, David, Youdin, A. N., & Richardson, D. C. 2010, Bulletin of the American Astronomical Society Formation of Kuiper Belt Binaries by Gravitational Collapse
Nesvorný, David, Youdin, Andrew N., & Richardson, Derek C. 2010, The Astronomical Journal Formation of Kuiper Belt Binaries by Gravitational Collapse
Ipatov, S. I. 2010, Monthly Notices of the Royal Astronomical Society The angular momentum of colliding rarefied preplanetesimals and the formation of binaries
Gamboa Suárez, Antonio, Hestroffer, Daniel, & Farrelly, David 2010, Celestial Mechanics and Dynamical Astronomy Formation of the extreme Kuiper-belt binary 2001 QW322 through adiabatic switching of orbital elements
Perets, Hagai B. & Naoz, Smadar 2009, The Astrophysical Journal Kozai Cycles, Tidal Friction, and the Dynamical Evolution of Binary Minor Planets
Farrelly, David, Gamboa Suárez, A., & Hestroffer, D. 2009, AAS/Division of Dynamical Astronomy Meeting #40 Formation of the extreme Kuiper-belt binary 2001 QW322
Petit, Jean-Marc, Kavelaars, J., Gladman, B., Margot, J. L., Nicholson, P., Jones, R., Parker, J., Ashby, M., & Campo Bagatin, A. 2009, Bulletin of the American Astronomical Society The extreme Kuiper Belt binary 2001 QW322
Petit, J.-M., Kavelaars, J. J., Gladman, B. J., Margot, J. L., Nicholson, P. D., Jones, R. L., Parker, J. Wm., Ashby, M. L. N., Campo Bagatin, A., Benavidez, P., Coffey, J., Rousselot, P., Mousis, O., & Taylor, P. A. 2008, Science The Extreme Kuiper Belt Binary 2001 QW322
Petit, J.-M., Kavelaars, J. J., Gladman, B. J., Margot, J.-L., Nicholson, P. D., Jones, R. L., Parker, J., & Ashby, M. 2008, LPI Contributions The Extreme KBO Binary 2001 QW322
Petit, J.-M. & Mousis, O. 2004, Icarus KBO binaries: how numerous were they?
Petit, J.-M. & Mousis, O. 2003, Bulletin of the American Astronomical Society KBO binaries: are they really primordial ?
Petit, Jean-Marc & Mousis, Olivier 2003, ArXiv Astrophysics e-prints KBO binaries: are they really primordial ?
Burns, J., Carruba, V., Gladman, B., & Marsden, B. G. 2002, Minor Planet Circulars 2001 QW322
Kavelaars, J., Petit, J.-M., Gladman, B., Holman, M., Nicholson, P., Dumas, C., Harris, A. W., & Marsden, B. G. 2001, Minor Planet Electronic Circ., 2001-V34 (2001). 2001 QW322

© 2001-2012, 2014 by Wm. Robert Johnston.
Last modified 20 September 2014.
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