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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766293781657847 6.112e-08  
a 2.431391294016176 1.5302e-08 AU
q 2.001936161676396 1.4978e-07 AU
i 6.625130786973885 7.5903e-06 deg
node 172.9997535172382 5.0529e-05 deg
peri 126.3297483925248 5.4785e-05 deg
M 13.90485094205667 2.2404e-05 deg
tp 2456747.013454450836
(2014-Mar-30.51345445)
8.5983e-05 JED
period 1384.779777786744
3.79
1.3073e-05
3.579e-08
d
yr
n .2599691342802379 2.4542e-09 deg/d
Q 2.860846426355956 1.8005e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      995  
   data-arc span      8024 days (21.97 yr)  
   first obs. used      1991-07-13  
   last obs. used      2013-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5749  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 16:01:04  

Additional Information
 Earth MOID = .994264 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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