Asteroids with Satellites Database--Johnston's Archive

(22) Kalliope and Linus

compiled by Wm. Robert Johnston
last updated 30 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: main belt asteroid


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.9094135691 AU
orbital period P: 4.962681372 yr
(= 1812.619371 d)
eccentricity e: 0.09815865
perihelion distance q: 2.62382946 AU
aphelion distance Q: 3.1949976782 AU
inclination i: 13.7018756°
argument of perihelion ω: 357.540398°
ascending node Ω: 65.995075°
mean anomaly M: 353.030484°
perihelion passage TP: 2021 Aug 05.091891
Epoch: 2021 Jul 01
data arc: 1954-2021 (3391 obs.)
Earth MOID: 1.63699 AU
Jupiter Tisserand invariant TJ: 3.234


orbital data, secondary:
binary dynamical type:L [P07f]
semimajor axis as: 1098.6 ± 6.1 km [D21a]
separation/primary radius as/rp:13.2 [*D]
separation/Hill radius as/rH:0.025 [*D]
orbital period Ps: 3.595606 ± 0.000375 d [D21a]
eccentricity es: 0 [D21a]
inclination is:94.18° ± 0.42° [D21a]
ascending node Ωs:284.3° ± 0.34° [D21a]
mean anomaly M:323.2° [D21a]
pericenter passage TP:2016 Dec 28.521± 0.004 [D21a]
Epoch:2017 Jan 1.0
normalized ang. mom. αL: 0.69 [P07f]

other data, system (combined):
absolute mag. H: 6.51 [MPC]
slope parameter G: 0.21 [JPL]
effective diameter dE: 168.5 ± 3.1 km [M14c]
geometric albedo: 0.166 ± 0.005 [M14c]
color index U-B: 0.234 [T95a]
color index B-V: 0.715 [T95a]
taxonomic type: X (SMASSII) [JPL]
M (Tholen) [JPL]
mass m: 8.13x1015 ± 1.4x1014 kg [D21a]
density ρ: 3.38 ± 0.06 g/cm3[*D]
Hill radius rH: 4000 km [*D]

other data, primary:
diameter dp: 166.2 ± 2.8 km [D08a]
dimensions :231.4 x 175.3 x 146.1km []
axial ratios a/b, b/c:1.32, 1.2 [M95a]
rotation period RPp: 4.1482003 ± 0.0000005 h [D95a]
amplitude in mag., rotational ΔM: 0.53 [W14e]
pole direction Β, λ: 41 ± 6° , 42 ± 10° [D95a]


other data, secondary:
diameter ds: 28 ± 2 km [D08a]
diameter ratio ds/dp: 0.168 ± 0.012 [*D]
component mag. difference ΔM: 3.22 ± 0.2 [M03e]
rotation period RPs: ?

-- (22) Kalliope and Linus --discovery and notes:

Primary discovered 1852 Nov 16 from London, United Kingdom by J. R. Hind. Permanent number assigned 1852.

Named 1852 for the Greek mythological muse [AN00838].

Companion discovered 2001 Aug 29 by J.-L. Margot, M. E. Brown, W. J. Merline, F. Menard, L. Close, C. Dumas, C. R. Chapman, and D. C. Slater using adaptive optics telescope observations from CFHT Telescope/W. M. Keck II Telescope, Mauna Kea, Hawaii, USA. Announced 2001 Sep 03 [G01a]. Provisional designation S/2001 (22) 1. Permanent designation I Linus, assigned 2003 Jul; named for the Greek mythological character [G03a].

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© 2001-2021, 2022 by Wm. Robert Johnston.
Last modified 30 April 2022.
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