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213529 (2002 HC18)
Classification: Main-belt Asteroid          SPK-ID: 2213529
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2490929956813421 4.7852e-08  
a 2.314173429160135 8.6084e-09 au
q 1.737729037164473 1.1095e-07 au
i 6.351777635879686 4.5099e-06 deg
node 48.99841175239373 4.8108e-05 deg
peri 263.0040920170094 5.0866e-05 deg
M 49.31511631045816 1.3436e-05 deg
tp 2459024.355193822427
(2020-Jun-23.85519382)
4.8233e-05 TDB
period 1285.855838293511
3.52
7.1748e-06
1.964e-08
d
yr
n .279969176387428 1.5622e-09 deg/d
Q 2.890617821155797 1.0753e-08 au
  Orbit Determination Parameters
   # obs. used (total)      456  
   data-arc span      7759 days (21.24 yr)  
   first obs. used      1999-10-09  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:43:04  

Additional Information
 Earth MOID = .736063 au 
 Jupiter MOID = 2.42412 au 
 T_jup = 3.532 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458137.5 (2018-Jan-19.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2488579661033772 4.787e-08  
q 1.738652792793532 1.1112e-07 au
tp 2457738.683865034811
(2016-Dec-16.18386503)
5.0785e-05 TDB
node 49.01689141555278 4.8081e-05 deg
peri 263.1068917787662 5.0845e-05 deg
i 6.353066205593593 4.5104e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      456  
   data-arc span      7759 days (21.24 yr)  
   first obs. used      1999-10-09  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:43:04  

Additional Information
 Jupiter MOID = 2.42412 au 
 T_jup = 3.532 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.291547668141533E-15 -5.310009039351559E-15 1.567819019237488E-12 4.790965057871475E-14 4.643551042616293E-13 -2.522877138755396E-14
q -5.310009039351559E-15 1.23471221387402E-14 -3.764109211497738E-12 -1.099397479320362E-13 -1.120582149009189E-12 5.888209609230547E-14
tp 1.567819019237488E-12 -3.764109211497738E-12 2.579164605765738E-9 5.078560089002991E-11 8.652213118368031E-10 -2.616069482400337E-11
node 4.790965057871475E-14 -1.099397479320362E-13 5.078560089002991E-11 2.311812666152791E-9 -2.280738220884087E-9 -1.360643646200769E-10
peri 4.643551042616293E-13 -1.120582149009189E-12 8.652213118368031E-10 -2.280738220884087E-9 2.585210945522068E-9 1.264128179312783E-10
i -2.522877138755396E-14 5.888209609230547E-14 -2.616069482400337E-11 -1.360643646200769E-10 1.264128179312783E-10 2.034389058000234E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.25   n/a E2021B55  

213529 (2002 HC18)          Discovered 2002-Apr-21 by Spacewatch at Kitt Peak
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 2002 HC18 = 2006 SU54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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