Asteroids with Satellites Database--Johnston's Archive

(27675) Paulmaley

compiled by Wm. Robert Johnston
last updated 20 October 2019

--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: 2.3517011824 AU
orbital period P: 3.6063942862 yr
(= 1317.2603911 d)
eccentricity e: 0.190773033
perihelion distance q: 1.90306002 AU
aphelion distance Q: 2.800342349 AU
inclination i: 24.6966664°
argument of perihelion ω: 186.263015°
ascending node Ω: 316.228856°
mean anomaly M: 207.779276°
perihelion passage TP: 2020 Nov 03.984252
Epoch: 2019 Apr 27
data arc: 1981-2019 (1451 obs.)
Earth MOID: 0.917947 AU
Jupiter Tisserand invariant TJ: 3.412


orbital data, secondary:
semimajor axis as: 32 km [*E]
separation/primary radius as/rp:12.8 [*E]
separation/Hill radius as/rH:0.043 [*E]
orbital period Ps: 5.004 ± 0.02 d [P17b]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 13.5 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 5.09 ± 0.2 km [JPL]
geometric albedo: 0.238 ± 0.037 [JPL]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 740 km [*E]

other data, primary:
diameter dp: 4.99 ± 0.2 km [*D]
rotation period RPp: 2.966 h [P17b]
amplitude in mag., rotational ΔM: ?
pole direction Β, λ: ? , ?


other data, secondary:
diameter ds: >1
diameter ratio ds/dp: >0.2 [P17b]
component mag. difference ΔM: <3.5 [*D]
rotation period RPs: ?

-- (27675) Paulmaley --discovery and notes:

Primary discovered 1981 Feb 02 from Klet, Czech Republic by L. Brozek. Alternate designation(s): 1981 CH, 1999 JL6. Permanent number assigned 2001 Sep 02.

Named 2019 Aug 27 for Eugene G. Fahnestock (1980-) [MPC115894].

Companion discovered 2017 by D. Pray, P. Pravec, H. Kucakova, K. Hornoch, P. Kusnirak, J. Vrastil, A. Carbognani, A. Aznar, V. Benishek, W. Cooney, J. Gross, D. Terrell, R. Montaigut, and A. Leroy using lightcurve observations. Announced 2017 Feb 14 [P17b].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2017, 2019 by Wm. Robert Johnston.
Last modified 20 October 2019.
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