Asteroids with Satellites Database--Johnston's Archive

(25687) 2000 AY117

compiled by Wm. Robert Johnston
last updated 13 July 2026

--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: 2.58681767777 AU
orbital period P: 4.1606092714 yr
(= 1519.66253637 d)
eccentricity e: 0.15704216911
perihelion distance q: 2.1805782186 AU
aphelion distance Q: 2.99305713698 AU
inclination i: 14.587205269°
argument of perihelion ω: 115.91373383°
ascending node Ω: 136.9735253°
mean anomaly M: 1.36391264°
perihelion passage TP: 2026 Jun 03.2425363
Epoch: 2026 Jun 09
data arc: 1989-2026 (4306 obs.)
Earth MOID: 1.20832 AU
Jupiter Tisserand invariant TJ: 3.359


orbital data, secondary:
semimajor axis as: ?
orbital period Ps: ?
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.31 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 6.01 ± 0.19 km [M19a]
geometric albedo: 0.338 ± 0.045 [M19a]
color index U-B: ?
color index B-V: ?
color index J-H:0.639 ± 0.154 [S10b]
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1020 km [*E]

other data, primary:
diameter dp: 6.01 ± 0.19 km [M19a]
dimensions :~7.0 x ~5.2 km [*E]
axial ratios a/b, b/c:1.3, ? [*E]
rotation period RPp: 2.75837 ± 0.00002 h [P26a]
amplitude in mag., rotational ΔM: 0.32 [P26a]
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: ?
diameter ratio ds/dp: ?
component mag. difference ΔM: ?
rotation period RPs: 5.756 ± 0.001 h [P26a]

-- (25687) 2000 AY117 --discovery and notes:

Primary discovered 2000 Jan 05 from Socorro, New Mexico, USA by LINEAR Program. Alternate designation(s): 1992 CD5. Linked to prediscovery observations from 1989 Aug 30. Permanent number assigned 2001 Jun 06.

Companion discovered 2026 May 20 by D. Pray, R. Durkee, et al. using lightcurve observations. Announced 2026 Jul 13 [P26a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2026 by Wm. Robert Johnston.
Last modified 13 July 2026.
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