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120819 (1998 HA87)
Classification: Main-belt Asteroid          SPK-ID: 2120819
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09545952203064853 5.4521e-08  
a 2.656446568733674 1.6392e-08 au
q 2.402863448982401 1.4572e-07 au
i 2.249379399405093 5.086e-06 deg
node 288.4707996188577 0.00015653 deg
peri 296.7185208750029 0.00016005 deg
M 29.87423182828245 3.5839e-05 deg
tp 2458869.266624236540
(2020-Jan-20.76662424)
0.00015708 TDB
period 1581.430295727941
4.33
1.4637e-05
4.007e-08
d
yr
n .2276420282149016 2.107e-09 deg/d
Q 2.910029688484947 1.7956e-08 au
  Orbit Determination Parameters
   # obs. used (total)      437  
   data-arc span      8617 days (23.59 yr)  
   first obs. used      1995-08-22  
   last obs. used      2019-03-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57616  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 07:09:19  

Additional Information
 Earth MOID = 1.39448 au 
 Jupiter MOID = 2.0775 au 
 T_jup = 3.380 
[ 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 16.0   n/a MPO469253  

120819 (1998 HA87)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HA87 = 1995 QJ15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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