(612239) 2001 QC298

Asteroids with Satellites Database--Johnston's Archive

(612239) 2001 QC298

compiled by Wm. Robert Johnston
last updated 10 April 2022

--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: 46.191 AU
orbital period P: 313.935 yr
(= 114664.7 d)
eccentricity e: 0.12164
perihelion distance q: 40.5721 AU
aphelion distance Q: 51.809 AU
inclination i: 30.6240°
argument of perihelion ω: 4.22°
ascending node Ω: 334.78984°
mean anomaly M: 13.46°
perihelion passage T_P: 2002 Aug 28
Epoch: 2014 May 23
data arc: 2000-2007 (26 obs.)
Earth MOID: 39.5626 AU
Jupiter Tisserand invariant T_J: 5.202

Neptune Tisserand invariant T_N: 2.77 [*D]

orbital data, secondary:

semimajor axis a_s: 3813 ± 15 km [G11a]
separation/primary radius a_s/r_p: 32 [*D]
separation/Hill radius a_s/r_H: 0.0050 [*D]
orbital period P_s: 19.23 ± 0.001 d [G11a]
eccentricity e_s: 0.335 ± 0.002 [G11a]
normalized ang. mom. α_L: ?

other data, system (combined):

absolute mag. H: 6.3 [MPC]
6.26 ± 0.32 [V14a]
slope parameter G: (0.15) [*A]
effective diameter d_E: 303 ± 29/32 km [V14a]
geometric albedo: 0.063 ± 0.029/0.018 [V14a]
color index U-B: 0.16 [J07a]
color index B-V: 0.66 [S09b]
color index V-R: 0.49 ± 0.03 [J07a]
color index B-R: 1.03 ± 0.08 [S09b]
color index V-I: 1 [S09b]
taxonomic type: ?
mass m: 1.19x10¹⁹ ± 1.4x10¹⁷ kg [G11a]
density ρ: 1.14 ± 0.34/0.3 g/cm³[V14a]
Hill radius r_H: 760000 km [*D]
other data, primary:

diameter d_p: 235 ± 21/23 km [V14a]
color index V-I: 0.78 ± 0.05 [B08d]
rotation period RP_p: 7.78 ± 0.48 h [T14a]
amplitude in mag., rotational ΔM: 0.3 ± 0.04 [T14a]
pole direction Β, λ: ? , ?

other data, secondary:

diameter d_s: 192 ± 17/19 km [V14a]
diameter ratio d_s/d_p: 0.817 [G11a]
component mag. difference ΔM: 0.44 [M05b]
color index V-I: 0.85± 0.05 [B08d]
rotation period RP_s: ?

-- (612239) 2001 QC298 --discovery and notes:

Primary discovered 2001 Aug 21 from Cerro Tololo Observatory, La Serena, Chile by M. W. Buie. Linked to prediscovery observations from 2000 Jul 29. Permanent number assigned 28 Mar 2022.

Companion discovered 2002 Oct 04 using Hubble Space Telescope observations from Hubble Space Telescope. Announced 2002 Dec 17.

--Links, more technical:

IAUC 8034.

--Links, less technical:

--Links to ADS abstracts:

Vilenius, E., Kiss, C., Müller, T., Mommert, M., Santos-Sanz, P., Pál, A., Stansberry, J., Mueller, M., Peixinho, N., Lellouch, E., Fornasier, S., Delsanti, A., Thirouin, A., Ortiz, J. L., Duffard, R., Perna, D., & Henry, F. 2014, Astronomy and Astrophysics "TNOs are Cool": A survey of the trans-Neptunian region. X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations
Jacobson, Seth & Margot, J. L. 2007, Bulletin of the American Astronomical Society Colors of TNO Binaries and Evidence for a Triple System from HST Observations
Margot, J. L., Brown, M. E., Trujillo, C. A., & Sari, R. 2004, Bulletin of the American Astronomical Society HST observations of Kuiper Belt binaries
Noll, K., Stephens, D., Grundy, W., Cruikshank, D., Tegler, S., & Romanishin, W. 2002, International Astronomical Union Circular 2001 QC_298
Osip, D. J., Elliot, J. L., Kern, S. D., Millis, R. L., & Marsden, B. G. 2002, Minor Planet Electronic Circulars 2001 QC298

© 2002-2014, 2022 by Wm. Robert Johnston.
Last modified 10 April 2022.
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