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JPL Small-Body Database Browser
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(1999 NW2)
Classification: Apollo [NEO]          SPK-ID: 3021049
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1087217649566615 1.0157e-07  
a 1.116218003486733 6.4525e-09 au
q .9948608120712542 1.1531e-07 au
i 8.679763727840552 7.0042e-06 deg
node 289.5251325520184 1.3324e-05 deg
peri 52.97879694878486 8.2675e-05 deg
M 208.4736743789933 8.9598e-05 deg
tp 2459181.804069672444
(2020-Nov-28.30406967)
0.00010712 TDB
period 430.7467023606832
1.18
3.735e-06
1.023e-08
d
yr
n .8357579942621501 7.2469e-09 deg/d
Q 1.237575194902212 7.154e-09 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -7.651866721698021E-14 1.023E-14
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      171  
   # delay obs. used      0  
   # Doppler obs. used      2  
   data-arc span      7206 days (19.73 yr)  
   first obs. used      1999-07-13  
   last obs. used      2019-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .32265  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Aug-26 05:14:14  

Additional Information
 Earth MOID = .0168295 au 
 Jupiter MOID = 3.9517 au 
 T_jup = 5.572 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 23.2   n/a MPO264918  
rotation period rot_per 4.2 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 upper-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Benner, L.A.M. (2011) http://echo.jpl.nasa.gov/~lance/radar.nea.periods.html]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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