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74031 (1998 HM22)
Classification: Main-belt Asteroid          SPK-ID: 2074031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1437889290727059 3.7399e-08  
a 2.341358436133224 8.4209e-09 au
q 2.004697014026283 8.8206e-08 au
i 2.363347685528812 4.422e-06 deg
node 160.3372843224029 8.8879e-05 deg
peri 59.33834405475174 8.9876e-05 deg
M 45.90579405580406 1.3975e-05 deg
tp 2458833.634986923933
(2019-Dec-16.13498692)
5.0523e-05 TDB
period 1308.580015724377
3.58
7.0596e-06
1.933e-08
d
yr
n .2751073649865564 1.4842e-09 deg/d
Q 2.678019858240166 9.6317e-09 au
  Orbit Determination Parameters
   # obs. used (total)      636  
   data-arc span      14208 days (38.90 yr)  
   first obs. used      1980-03-16  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54875  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:34:38  

Additional Information
 Earth MOID = .998111 au 
 Jupiter MOID = 2.29323 au 
 T_jup = 3.549 
[ show covariance matrix ]

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 16.3   n/a MPO436300  

74031 (1998 HM22)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HM22 = 1980 FC1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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