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91331 (1999 HX4)
Classification: Main-belt Asteroid          SPK-ID: 2091331
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1278116359255619 3.4379e-08  
a 2.296838612930886 7.9407e-09 au
q 2.003275912355191 7.7795e-08 au
i 6.532247631803805 6.0415e-06 deg
node 19.95731127061143 2.7671e-05 deg
peri 118.3958756532654 3.6231e-05 deg
M 182.4705752616251 2.3914e-05 deg
tp 2460023.491990292044
(2023-Mar-19.99199029)
8.5483e-05 TDB
period 1271.434956981218
3.48
6.5935e-06
1.805e-08
d
yr
n .2831446453656993 1.4684e-09 deg/d
Q 2.590401313506581 8.9557e-09 au
  Orbit Determination Parameters
   # obs. used (total)      773  
   data-arc span      8175 days (22.38 yr)  
   first obs. used      1999-03-21  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52081  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:01  

Additional Information
 Earth MOID = 1.02624 au 
 Jupiter MOID = 2.43197 au 
 T_jup = 3.575 
[ 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 16.15   n/a E2021B10  

91331 (1999 HX4)          Discovered 1999-Apr-17 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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