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49854 (1999 XB98)
Classification: Main-belt Asteroid          SPK-ID: 2049854
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07142317255309477 2.9139e-08  
a 2.214937119564975 7.9591e-09 au
q 2.056739283480031 6.3991e-08 au
i 6.033336794348627 3.4519e-06 deg
node 264.0975332879329 4.002e-05 deg
peri 195.6927945579085 5.1497e-05 deg
M 298.6744973412274 3.3073e-05 deg
tp 2458805.606368292671
(2019-Nov-18.10636829)
0.00011091 TDB
period 1204.038929712691
3.30
6.4899e-06
1.777e-08
d
yr
n .2989936547034269 1.6116e-09 deg/d
Q 2.373134955649919 8.5276e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      10962 days (30.01 yr)  
   first obs. used      1989-11-29  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52498  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:34  

Additional Information
 Earth MOID = 1.07435 au 
 Jupiter MOID = 2.73414 au 
 T_jup = 3.644 
[ 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 15.2   n/a MPO452848  
diameter diameter 2.767 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.253   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49854 (1999 XB98)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XB98 = 1989 WE5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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