Asteroids with Satellites Database--Johnston's Archive

(79472) Chiorny

compiled by Wm. Robert Johnston
last updated 9 October 2021

--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, Hungaria


orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.9621797285 AU
orbital period P: 2.748630614 yr
(= 1003.9373316 d)
eccentricity e: 0.080042539
perihelion distance q: 1.805121882 AU
aphelion distance Q: 2.119237575 AU
inclination i: 24.34261181°
argument of perihelion ω: 331.349174°
ascending node Ω: 93.3235127°
mean anomaly M: 241.208033°
perihelion passage TP: 2022 May 28.276917
Epoch: 2021 Jul 01
data arc: 1993-2021 (1644 obs.)
Earth MOID: 0.833588 AU
Jupiter Tisserand invariant TJ: 3.767


orbital data, secondary:
semimajor axis as: 7.7 km [*E]
separation/primary radius as/rp:4.7 [*E]
separation/Hill radius as/rH:0.016 [*E]
orbital period Ps: 1.081 ± 0.0008 d [W12c]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 14.89 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 3.47 km [*E]
geometric albedo: (0.16 ) [*A]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 470 km [*E]

other data, primary:
diameter dp: 3.31 km [*E]
rotation period RPp: 2.8802 ± 0.0002 h [W12c]
amplitude in mag., rotational ΔM: 0.21 ± 0.02 [W12c]
amplitude in mag., mutual events ΔM:0.12 [W12c]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: 1.06 km [*E]
diameter ratio ds/dp: 0.32 ± 0.03 [W12c]
component mag. difference ΔM: 2.47 ± 0.20 [*D]
rotation period RPs: ?

-- (79472) Chiorny --discovery and notes:

Primary discovered 1998 Jan 06 from Sormano, Italy by A. Testa and P. Chiavenna. Alternate designation(s): 1998 AX4 . Linked to prediscovery observations from 1993 Apr 26. Permanent number assigned 2004 May 04.

Named 2016 Jun 20 for Vasilij G. Chiorny (1953-) [MPC100607].

Companion discovered 2012 Mar 17 by B. D. Warner using lightcurve observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA. Announced 2012 Oct [W12c].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2012-2016, 2021 by Wm. Robert Johnston.
Last modified 9 October 2021.
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