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90857 (1996 HN8)
Classification: Main-belt Asteroid          SPK-ID: 2090857
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1715472974896201 3.4494e-08  
a 2.386687877659361 1.1535e-08 au
q 1.97725802229566 8.1328e-08 au
i 2.139899089376554 6.4249e-06 deg
node 199.3659215246399 0.00010971 deg
peri 73.81141768376392 0.00011176 deg
M 151.9042644496166 2.1537e-05 deg
tp 2458432.223976137707
(2018-Nov-09.72397614)
7.9662e-05 TDB
period 1346.765144031094
3.69
9.7631e-06
2.673e-08
d
yr
n .2673071853660093 1.9378e-09 deg/d
Q 2.796117733023061 1.3513e-08 au
  Orbit Determination Parameters
   # obs. used (total)      635  
   data-arc span      14137 days (38.70 yr)  
   first obs. used      1981-03-02  
   last obs. used      2019-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60316  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:15:43  

Additional Information
 Earth MOID = .962301 au 
 Jupiter MOID = 2.30967 au 
 T_jup = 3.514 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO348070  

90857 (1996 HN8)          Discovered 1996-Apr-17 by Elst, E. W. at La Silla
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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Alternate Designations
 1996 HN8 = 1981 ER46 = 2001 WH84 = 2003 FY116 = 2004 PO21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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