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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2954363160244057 4.0777e-08  
a 2.177568323832904 1.0816e-08 au
q 1.53423556034827 8.6788e-08 au
i 8.257763947882028 6.9846e-06 deg
node 53.10117137539672 3.172e-05 deg
peri 266.8391516946489 3.5567e-05 deg
M 114.7331404501655 2.1048e-05 deg
tp 2458226.438946322050
(2018-Apr-17.93894632)
6.6568e-05 TDB
period 1173.697318801733
3.21
8.7443e-06
2.394e-08
d
yr
n .3067230317672841 2.2852e-09 deg/d
Q 2.820901087317537 1.4011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      607  
   data-arc span      10673 days (29.22 yr)  
   first obs. used      1989-11-04  
   last obs. used      2019-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5362  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:07:28  

Additional Information
 Earth MOID = .550352 au 
 Jupiter MOID = 2.55142 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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