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Asteroids with Satellites Database--Johnston's Archive

(612239) 2001 QC298

compiled by Wm. Robert Johnston
last updated10 April 2022

--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:	46.191 AU
orbital periodP:	313.935 yr (= 114664.7 d)
eccentricitye:	0.12164
perihelion distanceq:	40.5721 AU
aphelion distanceQ:	51.809 AU
inclinationi:	30.6240°
argument of perihelionω:	4.22°
ascending nodeΩ:	334.78984°
mean anomalyM:	13.46°
perihelion passageT_P:	2002 Aug 28
Epoch:	2014 May 23
data arc:	2000-2007(26 obs.)
Earth MOID:	39.5626 AU
Jupiter Tisserand invariantT_J:	5.202
Neptune Tisserand invariantT_N:	2.77 [*D]

orbital data, secondary:

semimajor axisa_s:	3813± 15 km[G11a]
separation/primary radiusa_s/r_p:	32 [*D]
separation/Hill radiusa_s/r_H:	0.0050 [*D]
orbital periodP_s:	19.23± 0.001d [G11a]
eccentricitye_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 parameterG:	(0.15) [*A]
effective diameterd_E:	303± 29/32 km [V14a]
geometric albedo:	0.063± 0.029/0.018[V14a]
color indexU-B:	0.16[J07a]
color indexB-V:	0.66[S09b]
color indexV-R:	0.49 ± 0.03 [J07a]
color indexB-R:	1.03 ± 0.08 [S09b]
color indexV-I:	1 [S09b]
taxonomic type:	?
massm:	1.19x10¹⁹ ± 1.4x10¹⁷kg [G11a]
densityρ:	1.14± 0.34/0.3 g/cm³[V14a]
Hill radiusr_H:	760000 km [*D]

other data, primary:

diameterd_p:	235± 21/23 km [V14a]
color indexV-I:	0.78 ± 0.05 [B08d]
rotation periodRP_p:	7.78± 0.48h [T14a]
amplitude in mag., rotationalΔM:	0.3± 0.04 [T14a]
pole directionΒ, λ:	?,?

other data, secondary:

diameterd_s:	192± 17/19km [V14a]
diameter ratiod_s/d_p:	0.817 [G11a]
component mag. differenceΔM:	0.44 [M05b]
color indexV-I:	0.85± 0.05 [B08d]
rotation periodRP_s:	?

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

Primary discovered2001 Aug 21from Cerro Tololo Observatory, La Serena, Chileby M. W. Buie.Linked to prediscovery observations from 2000 Jul 29. Permanent number assigned 28 Mar 2022.

Companion discovered2002 Oct 04usingHubble Space Telescope observations from Hubble Space Telescope.Announced2002 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 SocietyColors 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 SocietyHST observations of Kuiper Belt binaries
Noll, K., Stephens, D., Grundy, W., Cruikshank, D., Tegler, S., & Romanishin, W. 2002, International Astronomical Union Circular2001 QC_298
Osip, D. J., Elliot, J. L., Kern, S. D., Millis, R. L., & Marsden, B. G. 2002, Minor Planet Electronic Circulars2001 QC298

©2002-2014, 2022by Wm. Robert Johnston.
Last modified10 April 2022.
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