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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1765547990732319 5.2889e-08  
a 2.431018592923346 1.3112e-08 AU
q 2.001810593706474 1.2696e-07 AU
i 6.625587062451466 7.181e-06 deg
node 172.9997869037519 4.2623e-05 deg
peri 126.2924428068485 4.7152e-05 deg
M 65.94002934870441 1.9638e-05 deg
tp 2456746.912709834033
(2014-Mar-30.41270983)
7.5075e-05 JED
period 1384.461386527145
3.79
1.1201e-05
3.067e-08
d
yr
n .260028920635369 2.1037e-09 deg/d
Q 2.860226592140219 1.5426e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1043  
   data-arc span      8452 days (23.14 yr)  
   first obs. used      1991-07-13  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54469  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:53:53  

Additional Information
 Earth MOID = .996055 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 (675)
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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