Asteroids with Satellites Database--Johnston's Archive

(3433) Fehrenbach

compiled by Wm. Robert Johnston
last updated 27 November 2015

--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: 2.393726861 AU
orbital period P: 3.703496084 yr
(= 1352.727493 d)
eccentricity e: 0.186430957
perihelion distance q: 1.94746207 AU
aphelion distance Q: 2.83999165 AU
inclination i: 4.5189577°
argument of perihelion ω: 74.276912°
ascending node Ω: 336.693855°
mean anomaly M: 328.467404°
perihelion passage TP: 2015 Oct 23.486138
Epoch: 2015 Jun 27
data arc: 1935-2015 (1204 obs.)
Earth MOID: 0.964115 AU
Jupiter Tisserand invariant TJ: 3.502

orbital data, secondary:
semimajor axis as: 14 km [*E]
separation/primary radius as/rp:3.8 [*D]
separation/Hill radius as/rH:0.011 [*D]
orbital period Ps: 0.8194 ± 0.0002 d [P15h]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 12.5 [MPC]
slope parameter G: (0.15) [*A]
effective diameter dE: 7.74 ± 0.06 km [M11b]
geometric albedo: 0.204 ± 0.028 [M11b]
color index U-B: ?
color index B-V: ?
taxonomic type: ?
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 1400 km [*E]

other data, primary:
diameter dp: 7.4 km [*D]
rotation period RPp: 3.916 ± 0.0003 h [P15h]
amplitude in mag., rotational ΔM: 0.27 [P15h]
amplitude in mag., mutual events ΔM:0.135 ±0.035 [P15h]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 2.3 km [*D]
axial ratios a/b, b/c:1.3;? [P15h]
diameter ratio ds/dp: 0.31 [P15h]
component mag. difference ΔM: 2.5 [*D]
rotation period RPs: 19.665 ± 0.005 h [P15h]

-- (3433) Fehrenbach --discovery and notes:

Primary discovered 1963 Oct 15 from Goethe Link Observatory, Brooklyn by Indiana Asteroid Program. Alternate designation(s): 1963 TJ1, 1935 EG, 1957 BF, 1970 PA1, 1974 RJ1, 1985 QD. Linked to prediscovery observations from 1935 Mar 07.

Companion discovered 2015 Oct 31 by D. Pray, P. Pravec, A. Marchini, F. Salvaggio, R. Papini, J. Pollock, D. Caton, R. Hawkins, V. Benishek, A. Smith, D. Reichart, J. Haislip using lightcurve observations from Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Ondrejov Observatory; University of Siena; Appalachian State University, USA; Belgrade Astronomical Observatory; Gemini North; University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA. Announced 2015 Nov 24 [P15h].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2015 by Wm. Robert Johnston.
Last modified 27 November 2015.
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