(50000) Quaoar and Weywot

compiled by Wm. Robert Johnston
last updated 3 November 2012

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: 43.612 AU
orbital period P: 288.01 y (=105,196.3 d)
eccentricity e: 0.03703
perihelion distance q: 41.997 AU
aphelion distance Q: 45.226 AU
inclination i: 7.98500°
argument of perihelion omega: 147.87°
ascending node OMEGA: 188.8225°
mean anomaly M: 284.03°
perihelion passage TP: 2068-01-19.3
Epoch: 10 APR 2007
data arc: 1954-2006 (133 obs.)

orbital data, secondary:
semimajor axis a: 14,500 ± 80 km [F10c]
semimajor axis/primary radius a/Rp: (23-33)
orbital period P: 12.438 ± 0.005 d [F10c]
eccentricity e: 0.14 ± 0.04 [F10c]
inclination i: 14° ± 4° [F10c];
150° ± 4° [F10c]
argument of periapsis omega: 348° ± 8° [F11a]
ascending node OMEGA: 1° ± 5° [F11a]

other data, primary:
diameter: 1260 ± 190 km [B04a]
1100 km [F09b]
890 ± 70 km [F10c]
absolute magnitude H: 2.67 ± 0.80 [JPL]
rotation period: 17.6788± 0.0004 h [O03c]
(8.840± 0.008 h) [R07a]
amplitude delta M: 0.133± 0.028 [O03c]
0.18±0.10 [R07a]
color index B-V: 0.94±0.01 [T03b]
color index V-R: 0.64±0.01 [T03b]
color index B-R: 1.58±0.01 [T03b]
color index V-I: 1.28±0.02 [F04a]
slope parameter G: (0.15) assumed
geometric albedo: 0.092 +0.036/-0.023 (R) [B04a]
0.101 +0.039/-0.024 (B) [B04a]
mass: (1.6 ± 0.3) x 1021 kg [F10c]
density: 2.8-3.5 g cm-3 [F09b]
4.2 ± 1.3 g cm-3 [F10c]
type: ?

other data, secondary:
diameter: (95 ± 24 km)
diameter ratio Ds/Dp: (0.076 ± 0.007)
component magnitude difference: 5.6±0.2 [I8812]
rotation period: ?

--(50000) Quaoar and Weywot--discovery and notes:

Primary discovered 4 June 2002 by C. A. Trujillo and M. E. Brown and Palomar Observatory, California, USA; subsequently linked to observations to 25 May 1954. Alternate designation 2002 LM60.

Companion discovered by M. E. Brown and T.-A. Suer using Hubble Space Telescope observations from 14 February 2006; reported 22 February 2007. Name assigned 11 November 2009.

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2007-2009, 2012 by Wm. Robert Johnston.
Last modified 3 November 2012.
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