Asteroids with Satellites Database--Johnston's Archive

(72036) 2000 XM44

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: 2.325124428 AU
orbital period P: 3.5454331282 yr
(= 1294.9939076 d)
eccentricity e: 0.275247432
perihelion distance q: 1.6851399 AU
aphelion distance Q: 2.965108955 AU
inclination i: 22.5948455°
argument of perihelion ω: 107.902475°
ascending node Ω: 32.552454°
mean anomaly M: 33.346796°
perihelion passage TP: 2018 Dec 28.044728
Epoch: 2019 Apr 27
data arc: 1955-2019 (1083 obs.)
Earth MOID: 0.816157 AU
Jupiter Tisserand invariant TJ: 3.425

orbital data, secondary:
semimajor axis as: 4.9 km [*E]
separation/primary radius as/rp:3.7 [*E]
separation/Hill radius as/rH:0.014 [*E]
orbital period Ps: 0.7822 ± 0.0005 d [B19c]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.4 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 2.70 ± 0.43 km [N16c]
geometric albedo: 0.422 ± 0.180 [N16c]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 350 km [*E]

other data, primary:
diameter dp: 2.62 km [*D]
rotation period RPp: 2.582 ± 0.0002 h [B19c]
amplitude in mag., rotational ΔM: 0.12 [B19c]
amplitude in mag., mutual events ΔM:0.085 ±0.015 [B19c]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: >0.66 km [*D]
diameter ratio ds/dp: >0.25 [B19c]
component mag. difference ΔM: <3.0 [*D]
rotation period RPs: ?

-- (72036) 2000 XM44 --discovery and notes:

Primary discovered 2000 Dec 09 from Fountain Hills by C. W. Juels. Linked to prediscovery observations from 1955 Jan 29. Permanent number assigned 2003 Nov 09.

Companion discovered 2019 Mar 18 by V. Benishek, P. Pravec, H. Kucakova, K. Hornoch, P. Kusnirak, D. Pray, W. Cooney, J. Gross, D. Terrell using lightcurve observations from Sopot Observatory, Serbia; Ondrejov Observatory, Czech Republic; Sugarloaf Mountain Observatory; Sonoita Research Observatory. Announced 2019 May 29 [B19c].

--Links, more technical:

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--Links to ADS abstracts:

© 2019, 2022 by Wm. Robert Johnston.
Last modified 30 April 2022.
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