Asteroids with Satellites Database--Johnston's Archive

(22) Kalliope and Linus

compiled by Wm. Robert Johnston
last updated 21 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: main belt asteroid


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 2.910478163 AU
orbital period P: 4.965405488 yr
(= 1813.6143550 d)
eccentricity e: 0.099848778
perihelion distance q: 2.61987048 AU
aphelion distance Q: 3.201085850 AU
inclination i: 13.7167902°
argument of perihelion ω: 354.871544°
ascending node Ω: 66.085229°
mean anomaly M: 200.666688°
perihelion passage TP: 2016 Aug 02.69217
Epoch: 2006 Sep 22
data arc: 1854-2013 (2144 obs.)
Earth MOID: 1.63217 AU
Jupiter Tisserand invariant TJ: 3.234


orbital data, secondary:
binary dynamical type:L [P07f]
semimajor axis as: 1095 ± 11 km [M08d]
separation/primary radius as/rp:13 [*D]
separation/Hill radius as/rH:0.025 [*D]
orbital period Ps: 3.596 ± 0.001 d [M08d]
eccentricity es: <0.002 [M08d]
inclination is:93.4° ± 1.0° [M03d]
normalized ang. mom. αL: 0.69 [P07f]

other data, system (combined):
absolute mag. H: 6.45 [MPC]
slope parameter G: 0.21 [JPL]
effective diameter dE: 168.5 ± 3.1 km [*D]
geometric albedo: 0.169 ± 0.061 [M11b]
color index U-B: 0.234 [T95a]
color index B-V: 0.715 [T95a]
taxonomic type: X (SMASSII) [JPL]
M (Tholen) [JPL]
mass m: 8.1x1018 ± 2x1017 kg [M08d]
density ρ: 3.35 ± 0.33 g/cm3[D08a]
Hill radius rH: 43000 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, 1.20 [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 ± 0.20 [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.

Companion discovered 2001 Aug 29 by J.-L. Margot, M. E. Brown, W. J. Merline, F. Menard, L. Close, C. Dumas, C. R. Chapman, 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].

--Links, more technical:

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--Links to ADS abstracts:


© 2001-2007, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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