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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2957322450357757 4.0738e-08  
a 2.177099689872328 1.0824e-08 au
q 1.533261110919694 8.6681e-08 au
i 8.257623779006922 6.2701e-06 deg
node 53.09031301152596 3.1456e-05 deg
peri 266.8656257882416 3.5008e-05 deg
M 237.4126351146985 2.1314e-05 deg
tp 2459400.038936844692
(2021-Jul-04.53893684)
7.181e-05 TDB
period 1173.318452506642
3.21
8.7498e-06
2.396e-08
d
yr
n .3068220730961034 2.2881e-09 deg/d
Q 2.820938268824963 1.4024e-08 au
  Orbit Determination Parameters
   # obs. used (total)      629  
   data-arc span      11047 days (30.25 yr)  
   first obs. used      1989-11-04  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53443  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 10:34:30  

Additional Information
 Earth MOID = .550196 au 
 Jupiter MOID = 2.55435 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 16.1   n/a MPO459211  

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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