2006 BR284

compiled by Wm. Robert Johnston
last updated 15 August 2011

Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

orbital data, primary (osculating elements) [JPL]:
semimajor axis a: 43.81711 AU
orbital period P: 290.05 y (=105,940.9 d)
eccentricity e: 0.040232
perihelion distance q: 42.05425 AU
aphelion distance Q: 45.57998 AU
inclination i: 1.1574°
argument of perihelion omega: 100.3802°
ascending node OMEGA: 15.1396°
mean anomaly M: 15.4281°
perihelion passage TP: 1999-03-22.8
Epoch: 27 AUG 2011
data arc: 2006-2011 (29 obs.)

orbital data, secondary:
semimajor axis a: 25,300 ± 300 km [P11a]
semimajor axis/primary radius a/Rp: (560)
orbital period P: 4.11 +0.04/-0.03 yr [P11a]
eccentricity e: 0.28 ± 0.01 [P11a]
inclination to ecliptic i: 55.6° +1.3°/-1.4° [P11a]
argument of perihelion omega: 14° ± 1° [P11a]
ascending node OMEGA: 41° ±2° [P11a]
mean anomaly M: 219° ±1° [P11a]
epoch: JD 2455153.08 [P11a]

other data, primary:
diameter: 89.8 +0.8/-1.0 km [P11a]
absolute magnitude H: 6.9 [JPL]
rotation period: ?
amplitude delta M: ?
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: 0.22 ± 0.01 [P11a]
mass: (5.70 +0.17/-0.20)x1017 kg [P11a]
density: (1 g cm-3) [a]
type: ?

other data, secondary:
diameter: (71 km)
diameter ratio Ds/Dp: (0.79)
component magnitude difference: 0.50 ± 0.04 [P11a]
rotation period: ?

----discovery and notes:

Primary discovered 31 January 2006 from Mauna Kea.

Companion discovered 2006; reported 11 August 2011.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2011 by Wm. Robert Johnston.
Last modified 15 August 2011.
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