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49931 (1999 XL177)
Classification: Main-belt Asteroid          SPK-ID: 2049931
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05245314948076603 2.755e-08  
a 2.384847089938958 9.5167e-09 au
q 2.25975434904162 6.5611e-08 au
i 3.157597920032587 4.2631e-06 deg
node 335.7162687700081 6.1736e-05 deg
peri 119.7993237117656 7.8677e-05 deg
M 204.7113560654781 4.8834e-05 deg
tp 2459580.765073979770
(2022-Jan-01.26507398)
0.00018365 TDB
period 1345.207359276051
3.68
8.052e-06
2.205e-08
d
yr
n .2676167339686135 1.6019e-09 deg/d
Q 2.509939830836296 1.0016e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1223  
   data-arc span      8019 days (21.95 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5124  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 04:42:46  

Additional Information
 Earth MOID = 1.27854 au 
 Jupiter MOID = 2.5582 au 
 T_jup = 3.532 
[ 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 15.4   n/a MPO324757  

49931 (1999 XL177)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XL177 = 2001 KB26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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