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52730 (1998 HN4)
Classification: Mars-crossing Asteroid          SPK-ID: 2052730
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2958311155307564 4.0678e-08  
a 2.176893088456694 1.0689e-08 au
q 1.532900377707357 8.6531e-08 au
i 8.25806496932298 5.6544e-06 deg
node 53.08731058222612 3.1306e-05 deg
peri 266.8868716468936 3.4542e-05 deg
M 298.7697949594188 2.1212e-05 deg
tp 2459400.034175411125
(2021-Jul-04.53417541)
7.0306e-05 TDB
period 1173.15143890825
3.21
8.6408e-06
2.366e-08
d
yr
n .3068657532696892 2.2602e-09 deg/d
Q 2.820885799206031 1.3851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      683  
   data-arc span      11176 days (30.60 yr)  
   first obs. used      1989-11-04  
   last obs. used      2020-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53881  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 10:47:26  

Additional Information
 Earth MOID = .548033 au 
 Jupiter MOID = 2.55448 au 
 T_jup = 3.613 
[ 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 16.13   n/a MPCxxxxx  

52730 (1998 HN4)          Discovered 1998-Apr-22 by Spacewatch at Kitt Peak
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HN4 = 1999 XK220 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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