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523939 (1998 HB12)
Classification: Main-belt Asteroid          SPK-ID: 2523939
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1445005975517407 6.7567e-08  
a 2.342243177292871 2.0376e-08 au
q 2.003787638562564 1.5684e-07 au
i 9.762910371017833 8.4063e-06 deg
node 19.81378993708238 4.5219e-05 deg
peri 163.9667736996662 6.344e-05 deg
M 80.6877108838888 4.1943e-05 deg
tp 2458707.038390824955
(2019-Aug-11.53839083)
0.00015061 TDB
period 1309.321805585032
3.58
1.7085e-05
4.678e-08
d
yr
n .2749515042553993 3.5878e-09 deg/d
Q 2.680698716023179 2.332e-08 au
  Orbit Determination Parameters
   # obs. used (total)      47  
   data-arc span      8121 days (22.23 yr)  
   first obs. used      1998-04-19  
   last obs. used      2020-07-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63796  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 22:41:06  

Additional Information
 Earth MOID = 1.0069 au 
 Jupiter MOID = 2.27638 au 
 T_jup = 3.530 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.4   .19025 MPO457200 autocmod 2.6q

523939 (1998 HB12)          Discovered 1998-Apr-19 by Spacewatch at Kitt Peak
Reference: Last Updated: 2019-05-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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