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22476 (1997 EM23)
Classification: Main-belt Asteroid          SPK-ID: 2022476
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1930292841033855 6.7835e-08  
a 2.636797890893928 2.1666e-08 AU
q 2.127818681689356 1.8083e-07 AU
i 13.32000023998943 5.6277e-06 deg
node 97.61837885391796 3.0831e-05 deg
peri 267.5562207144715 3.449e-05 deg
M 200.2584987902604 1.7683e-05 deg
tp 2457694.451232702690
(2016-Nov-01.95123270)
7.8712e-05 JED
period 1563.91696510322
4.28
1.9275e-05
5.277e-08
d
yr
n .2301912493009114 2.8371e-09 deg/d
Q 3.1457771000985 2.5848e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1007  
   data-arc span      21998 days (60.23 yr)  
   first obs. used      1955-04-20  
   last obs. used      2015-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48936  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:59:41  

Additional Information
 Earth MOID = 1.17537 AU 
 T_jup = 3.333 
[ 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 12.8 mag n/a MPO309330  

22476 (1997 EM23)          Discovered 1997-Mar-08 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 EM23 = 2000 YQ21 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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