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176641 (2002 NQ9)
Classification: Main-belt Asteroid          SPK-ID: 2176641
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | 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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2441052103793339 6.3136e-08  
a 2.477175687935853 1.3873e-08 au
q 1.8724841954857 1.5079e-07 au
i 6.7524714052365 5.419e-06 deg
node 147.7423794801586 3.1497e-05 deg
peri 223.058845380823 3.2624e-05 deg
M 156.6815265992547 6.6833e-06 deg
tp 2458380.703764678448
(2018-Sep-19.20376468)
2.5678e-05 TDB
period 1424.077551187327
3.90
1.1963e-05
3.275e-08
d
yr
n .2527952215101273 2.1236e-09 deg/d
Q 3.081867180386005 1.726e-08 au
  Orbit Determination Parameters
   # obs. used (total)      613  
   data-arc span      7407 days (20.28 yr)  
   first obs. used      2000-01-07  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:57:30  

Additional Information
 Earth MOID = .878241 au 
 Jupiter MOID = 2.39121 au 
 T_jup = 3.429 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO412978  

176641 (2002 NQ9)          Discovered 2002-Jul-03 by NEAT at Palomar
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

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