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21066 (1991 NG5)
Classification: Main-belt Asteroid          SPK-ID: 2021066
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2265567478248089 6.4791e-08  
a 2.380625537036952 1.512e-08 AU
q 1.841278757577171 1.5526e-07 AU
i 4.344263647996769 6.8821e-06 deg
node 292.6067862642676 8.0924e-05 deg
peri 358.6468595176797 8.1816e-05 deg
M 134.6163580451859 1.5186e-05 deg
tp 2456498.815833161932
(2013-Jul-25.31583316)
5.415e-05 JED
period 1341.637098821833
3.67
1.2782e-05
3.5e-08
d
yr
n .2683288948376101 2.5563e-09 deg/d
Q 2.919972316496734 1.8545e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      661  
   data-arc span      8675 days (23.75 yr)  
   first obs. used      1991-07-10  
   last obs. used      2015-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54407  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:38:37  

Additional Information
 Earth MOID = .826305 AU 
 T_jup = 3.500 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO337436  

21066 (1991 NG5)          Discovered 1991-Jul-10 by Debehogne, H. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 NG5 = 1998 FQ117 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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