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91416 (1999 NH55)
Classification: Main-belt Asteroid          SPK-ID: 2091416
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1402645906779847 3.5384e-08  
a 2.626762052946708 1.6371e-08 au
q 2.258320348781675 9.3373e-08 au
i 11.90784418530942 4.0858e-06 deg
node 250.3756026556554 2.7145e-05 deg
peri 4.561524803348132 3.369e-05 deg
M 13.28157941898887 2.0994e-05 deg
tp 2458943.131069953156
(2020-Apr-03.63106995)
9.0559e-05 TDB
period 1554.99689949046
4.26
1.4537e-05
3.98e-08
d
yr
n .231511715629764 2.1643e-09 deg/d
Q 2.99520375711174 1.8667e-08 au
  Orbit Determination Parameters
   # obs. used (total)      852  
   data-arc span      7696 days (21.07 yr)  
   first obs. used      1999-07-12  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56703  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:17:20  

Additional Information
 Earth MOID = 1.2439 au 
 Jupiter MOID = 2.05866 au 
 T_jup = 3.358 
[ 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 14.8   n/a MPO474792  

91416 (1999 NH55)          Discovered 1999-Jul-12 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 NH55 = 2000 VY55 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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