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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1759517396898956 5.001e-08  
a 2.431855807252667 1.1652e-08 au
q 2.003966547291585 1.1821e-07 au
i 6.626171227564188 5.9595e-06 deg
node 172.9952655464422 3.6057e-05 deg
peri 126.2108335089318 3.9785e-05 deg
M 222.0633407705152 1.7836e-05 deg
tp 2458131.240660237088
(2018-Jan-12.74066024)
7.0182e-05 JED
period 1385.176636527601
3.79
9.9554e-06
2.726e-08
d
yr
n .2598946520657885 1.8679e-09 deg/d
Q 2.859745067213749 1.3702e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1355  
   data-arc span      9038 days (24.74 yr)  
   first obs. used      1991-07-13  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52439  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:03:05  

Additional Information
 Earth MOID = .996749 au 
 Jupiter MOID = 2.37901 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 13.7 mag n/a MPO365353  

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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