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49378 (1998 XU2)
Classification: Main-belt Asteroid          SPK-ID: 2049378
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1755290282955147 3.2782e-08  
a 2.673312745869329 1.0543e-08 au
q 2.204068757256871 8.8172e-08 au
i 12.06691092285924 4.3322e-06 deg
node 341.2943360784301 1.5233e-05 deg
peri 40.48236603680156 1.9641e-05 deg
M 14.02778110742754 1.1573e-05 deg
tp 2458938.290091856397
(2020-Mar-29.79009186)
5.1225e-05 TDB
period 1596.515283506873
4.37
9.4446e-06
2.586e-08
d
yr
n .2254911078641423 1.334e-09 deg/d
Q 3.142556734481786 1.2394e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1427  
   data-arc span      9926 days (27.18 yr)  
   first obs. used      1993-09-10  
   last obs. used      2020-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49943  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:50:37  

Additional Information
 Earth MOID = 1.21963 au 
 Jupiter MOID = 2.38658 au 
 T_jup = 3.327 
[ 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 14.2   n/a MPO436129  
diameter diameter 6.180 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.127   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49378 (1998 XU2)          Discovered 1998-Dec-07 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XU2 = 2000 EP91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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