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91155 (1998 QW50)
Classification: Main-belt Asteroid          SPK-ID: 2091155
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1968208435602101 3.6616e-08  
a 3.174681857918373 2.3203e-08 au
q 2.549838296607584 1.1867e-07 au
i 15.51792767092538 6.1321e-06 deg
node 350.5826354430662 1.5953e-05 deg
peri 82.00086582249459 2.5099e-05 deg
M 245.3031909912474 1.7627e-05 deg
tp 2459658.760168907612
(2022-Mar-20.26016891)
0.00010243 TDB
period 2066.087651912416
5.66
2.2651e-05
6.202e-08
d
yr
n .1742423655970143 1.9103e-09 deg/d
Q 3.799525419229162 2.777e-08 au
  Orbit Determination Parameters
   # obs. used (total)      830  
   data-arc span      9281 days (25.41 yr)  
   first obs. used      1995-03-02  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55333  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:15:33  

Additional Information
 Earth MOID = 1.62009 au 
 Jupiter MOID = 1.79603 au 
 T_jup = 3.115 
[ 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 14.0   n/a MPO449560  
diameter diameter 10.217 km 0.752 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.047   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

91155 (1998 QW50)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 QW50 = 1995 EG7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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