JPL Small-Body Database Browser

+ View the NASA Portal
+ Center for Near-Earth Object Studies

(1998 WW31)

Classification: TransNeptunian Object SPK-ID: 3031823

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.09101879259144918	0.00016308
a	44.47742348550198	0.014211	au
q	40.42914210227303	0.020031	au
i	6.81712171823271	0.00030293	deg
node	237.1375778556559	0.00029258	deg
peri	51.21812990523897	0.12427	deg
M	141.8474991207344	0.13377	deg
t_p	2416310.412868287203 (1903-Jul-14.91286829)	20.64	TDB
period	108344.7467363219 296.63	51.928 0.1422	d yr
n	.003322726858886203	1.5925e-06	deg/d
Q	48.52570486873093	0.015505	au

Orbit Determination Parameters

# obs. used (total)	38
data-arc span	7647 days (20.94 yr)
first obs. used	1998-11-18
last obs. used	2019-10-26
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	4
norm. resid. RMS	.34489
source	ORB
producer	Otto Matic
solution date	2020-Feb-21 21:32:43

Additional Information

Earth MOID = 39.4172 au

Jupiter MOID = 35.2636 au

T_jup = 5.899

[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
absolute magnitude	H	6.7		n/a	MPO230178

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

2021-Jan-23 14:34 UT
(server date/time)

Site Manager:	Ryan S. Park
Webmaster:	Alan B. Chamberlin