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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 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766195507872988 6.1988e-08  
a 2.430914427581559 1.5373e-08 AU
q 2.00156741337974 1.5171e-07 AU
i 6.625450060048998 7.654e-06 deg
node 173.0087635598949 5.1104e-05 deg
peri 126.4043969364103 5.5297e-05 deg
M 269.8360693553358 2.2085e-05 deg
tp 2456747.223492954104
(2014-Mar-30.72349295)		 8.6129e-05 JED
period 1384.372404475072
3.79		 1.3132e-05
3.595e-08		 d
yr
n .2600456342789534 2.4667e-09 deg/d
Q 2.860261441783377 1.8088e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      987  
   data-arc span      7952 days (21.77 yr)  
   first obs. used      1991-07-13  
   last obs. used      2013-04-20  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .57063  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:32:13  

Additional Information
 Earth MOID = .994687 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 13.9 mag n/a PDS3 (MPC 31679)  

8669 (1991 NS1)          Discovered 1991-Jul-13 by Holt, H. E. at Palomar (675)
Reference: 19980511/Numbers.arcLast Updated: 2004-04-19

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