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Asteroids with Satellites Database--Johnston's Archive

(1866) Sisyphus

compiled by Wm. Robert Johnston
last updated29 May 2019

--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:NEA, Apollo

orbital data, primary (osculating elements)[JPL]:

semimajor axisa:	1.893818726 AU
orbital periodP:	2.606248439 yr (= 951.9322422 d)
eccentricitye:	0.538293967
perihelion distanceq:	0.874387531 AU
aphelion distanceQ:	2.913249921 AU
inclinationi:	41.18974205°
argument of perihelionω:	293.0454938°
ascending nodeΩ:	63.56059474°
mean anomalyM:	352.0426005°
perihelion passageT_P:	2014 Jun 13.04140
Epoch:	2014 May 23
data arc:	1955-2013(2352 obs.)
Earth MOID:	0.103525 AU
Jupiter Tisserand invariantT_J:	3.513

orbital data, secondary:

semimajor axisa_s:	19 km[*E]
separation/primary radiusa_s/r_p:	4.5 [*E]
separation/Hill radiusa_s/r_H:	0.033 [*E]
orbital periodP_s:	1.13d [W17a]
eccentricitye_s:	?
normalized ang. mom.α_L:	?

other data, system (combined):

absolute mag.H:	12.4[MPC]
slope parameterG:	(0.15) [*A]
effective diameterd_E:	8.48± 1.27 km [D03a]
geometric albedo:	0.15± 0.045[D03a]
color indexU-B:	?
color indexB-V:	?
taxonomic type:	S (SMASSII) [JPL]
massm:	?
densityρ:	(1.6 g/cm³) [*A]
Hill radiusr_H:	570 km [*E]

other data, primary:

diameterd_p:	8.44± 1.27 km [*D]
rotation periodRP_p:	2.3909h [W17a]
amplitude in mag., rotationalΔM:	0.03 [W17a]
pole directionΒ, λ:	?,?

other data, secondary:

diameterd_s:	0.84± 0.44km [*D]
diameter ratiod_s/d_p:	0.1± 0.05 [W17a]
component mag. differenceΔM:	5.0± 1.2 [*D]
rotation periodRP_s:	?

--(1866) Sisyphus --discovery and notes:

Primary discovered1972 Dec 05from Zimmerwald, Switzerlandby P. Wild.Alternate designation(s):1972 XA.Linked to prediscovery observations from 1955 Jan 26.Permanent number assigned -.

Named - for the Greek mythological king [MPC003758].

Companion discovered1985 Dec usingradar observations from Arecibo Observatory, Puerto Rico.Announced2007 Dec .

--Links, more technical:

Binary Near-Earth Asteroids Detected by Radar, JPL.

--Links, less technical:

--Links to ADS abstracts:

Stephens, Robert D., French, Linda, M., Warner, Brian D., & Wasserman, Lawrence H. 2011, Minor Planet BulletinThe Curse of Sisyphus
Dave, Riddhi, Emery, J., Cruikshank, D., Mueller, M., Delbo, M., Trilling, D. E., & Mommert, M. 2010, Bulletin of the American Astronomical SocietyThermal Emission Spectroscopy (5.2 To 38 Microns) And Analysis Of 10 Near-earth Asteroids
Lupishko, D. F. & Lupishko, T. A. 2000, Catastrophic Events and Mass Extinctions: Impacts and BeyondAsteroid Hazard: Core of the Problem
Degraff, D. R., Robbins, A. M., & Gutermuth, R. A. 1998, Bulletin of the American Astronomical SocietyRotation Curves for 13 Asteroids
Skiff, B. A., Buie, M. W., & Bowell, E. 1996, Bulletin of the American Astronomical SocietyNear-Earth Asteroid Physical Observations: 1993-1995
Schober, H. J., Erikson, A., Hahn, G., Lagerkvist, C. I., & Oja, T. 1993, Astronomy and Astrophysics Supplement SeriesPhysical Studies of Asteroids. Part XXVI. Rotation and Photoelectric Photometry of Asteroids 323, 350, 582, 1021 and 1866
Hahn, Gerhard & Lagerkvist, Claes-Ingvar 1987, Celestial MechanicsOrbital evolution studies of planet-crossing asteroids.
McFadden, L. A. & Ahearn, M. F. 1986, Planetary Astronomy, 1985Planet-crossing asteroids: Interrelationships within the solar system
McCrosky, R. E. & Marsden, B. G. 1986, Planetary Astronomy, 1985Astrometric observations of comets and asteroids and subsequent orbital investigations
Seki, T., Giclas, H. L., Kantz, M. L., Wild, P., & Marsden, B. G. 1973, International Astronomical Union Circular1972 XA.
1973, Kometnyj TsirkulyarFast moving object Wild, 1972 XA.
Marsden, B. G. 1973, International Astronomical Union Circular1972 XA.
Ruhnow, D., Petermann, S., Kohoutek, L., Dieckvoss, M., Wild, P., & Milet, B. 1973, International Astronomical Union Circular1972 XA.
Wild, P., Milet, B., & Schürer, M. 1973, International Astronomical Union Circular1972 XA.
Meeus, J. 1973, Ciel et TerreNouvelles brèves: La petite Planète 1972 XA
Seki, T., Wild, P., Rickman, H., Tidblad, Shao, C. Y., & Marsden, B. G. 1972, International Astronomical Union Circular1972 XA (object Wild).

©2008-2014, 2019by Wm. Robert Johnston.
Last modified29 May 2019.
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