Asteroids with Satellites Database--Johnston's Archive

(357439) 2004 BL86

compiled by Wm. Robert Johnston
last updated 31 January 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: NEA, Apollo (PHA)

orbital data, primary (osculating elements) [JPL] :
semimajor axis a: 1.5022021268 AU
orbital period P: 1.841164357 yr
(= 672.4979823 d)
eccentricity e: 0.403073161
perihelion distance q: 0.896704767 AU
aphelion distance Q: 2.107699486 AU
inclination i: 23.743614°
argument of perihelion ω: 311.254949°
ascending node Ω: 126.7203777°
mean anomaly M: 354.0330668°
perihelion passage TP: 2014 Dec 20.1465293
Epoch: 2014 Dec 09
data arc: 2004-2015 (243 obs.)
Earth MOID: 0.0081707 AU
Jupiter Tisserand invariant TJ: 4.364

orbital data, secondary:
semimajor axis as: 0.5 km (separation) [J15a]
separation/primary radius as/rp:3 [*D]
separation/Hill radius as/rH:0.022 [*E]
orbital period Ps: 0.6 d [*E]
eccentricity es: ?
normalized ang. mom. αL: ?

other data, system (combined):
absolute mag. H: 19 [MPC]
19.1 [B15a]
slope parameter G: (0.15) [*A]
effective diameter dE: 0.33 km [*D]
geometric albedo: 0.37 [*D]
color index U-B: ?
color index B-V: ?
taxonomic type: V (SMASSII) [P15a]
mass m: ?
density ρ: (1.6 g/cm3) [*A]
Hill radius rH: 22 km [*E]

other data, primary:
diameter dp: 0.32 km [J15a]
rotation period RPp: 2.6 h [B15a]
amplitude in mag., rotational ΔM: 0.25 [B15a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 0.07 km [J15a]
diameter ratio ds/dp: 0.21 [J15a]
component mag. difference ΔM: 3.4 [*D]
rotation period RPs: ?

-- (357439) 2004 BL86 --discovery and notes:

Primary discovered 2004 Jan 30 from Socorro, New Mexico, USA by LINEAR. Permanent number assigned 2013 Mar 27.

Companion discovered 2015 Jan 26 using radar observations from Goldstone, California, USA. Announced 2015 Jan 27 [C4063].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2015, 2014 by Wm. Robert Johnston.
Last modified 31 January 2015.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.