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49891 (1999 XF158)
Classification: Main-belt Asteroid          SPK-ID: 2049891
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07960811375815328 3.4486e-08  
a 2.248723402799422 8.2821e-09 au
q 2.069706774338744 8.0065e-08 au
i 5.385608372661972 4.0826e-06 deg
node 243.0900855721947 3.9245e-05 deg
peri 249.8339027449458 4.7408e-05 deg
M 229.1307836181423 2.6196e-05 deg
tp 2459048.251951717322
(2020-Jul-17.75195172)
8.9722e-05 TDB
period 1231.693037328998
3.37
6.8046e-06
1.863e-08
d
yr
n .2922806162651387 1.6147e-09 deg/d
Q 2.4277400312601 8.9415e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1186  
   data-arc span      8258 days (22.61 yr)  
   first obs. used      1997-04-28  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47891  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:51  

Additional Information
 Earth MOID = 1.09185 au 
 Jupiter MOID = 2.61468 au 
 T_jup = 3.619 
[ 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 15.1   n/a MPO347864  
diameter diameter 2.813 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.323   0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49891 (1999 XF158)          Discovered 1999-Dec-08 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XF158 = 1997 HD4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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