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8669 (1991 NS1)
Classification: Main-belt Asteroid          SPK-ID: 2008669
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1763513772616458 5.011e-08  
a 2.430999525945085 1.1959e-08 au
q 2.002289411422261 1.1857e-07 au
i 6.625737921361465 6.6187e-06 deg
node 172.9988599423251 3.6878e-05 deg
peri 126.2447859680569 4.1476e-05 deg
M 170.0312863599787 1.886e-05 deg
tp 2456746.613941622432
(2014-Mar-30.11394162)
7.1446e-05 JED
period 1384.445098636458
3.79
1.0216e-05
2.797e-08
d
yr
n .2600319798557303 1.9188e-09 deg/d
Q 2.859709640467909 1.4068e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1275  
   data-arc span      8926 days (24.44 yr)  
   first obs. used      1991-07-13  
   last obs. used      2015-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53072  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:08:02  

Additional Information
 Earth MOID = .99362 au 
 Jupiter MOID = 2.37808 au 
 T_jup = 3.477 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO266004  

8669 (1991 NS1)          Discovered 1991-Jul-13 by Holt, H. E. at Palomar
Reference: 19980511/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 NS1 = 1987 MR 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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