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49380 (1998 XU4)
Classification: Main-belt Asteroid          SPK-ID: 2049380
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 .04052270933261363 3.9291e-08  
a 2.834254655649476 1.5286e-08 au
q 2.719402978063985 1.1023e-07 au
i 2.485466250549619 5.0334e-06 deg
node 42.26317633308123 0.00010173 deg
peri 41.65713625105221 0.00012425 deg
M 191.3623732663991 7.1728e-05 deg
tp 2459816.910742885734
(2022-Aug-25.41074289)
0.00034954 TDB
period 1742.836833817368
4.77
1.41e-05
3.86e-08
d
yr
n .2065597840341056 1.6711e-09 deg/d
Q 2.949106333234967 1.5906e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1380  
   data-arc span      9217 days (25.23 yr)  
   first obs. used      1995-03-23  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5238  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:52:37  

Additional Information
 Earth MOID = 1.73595 au 
 Jupiter MOID = 2.13381 au 
 T_jup = 3.309 
[ 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 MPO395468  
diameter diameter 3.646 km 0.767 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.334   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49380 (1998 XU4)          Discovered 1998-Dec-12 by Kobayashi, T. at Oizumi
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XU4 = 2000 FJ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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