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249500 (2009 XL22)
Classification: Main-belt Asteroid          SPK-ID: 2249500
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04239840322885962 5.6922e-08  
a 3.131236967833939 3.6649e-08 au
q 2.998477520266604 1.9118e-07 au
i 9.849142361998535 5.7104e-06 deg
node 93.15806570463636 4.148e-05 deg
peri 39.04910115206765 0.00010109 deg
M 298.6403832588417 9.2687e-05 deg
tp 2459345.447076001576
(2021-May-10.94707600)
0.0005233 TDB
period 2023.822082924944
5.54
3.5531e-05
9.728e-08
d
yr
n .1778812490669671 3.123e-09 deg/d
Q 3.263996415401274 3.8203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      326  
   data-arc span      7652 days (20.95 yr)  
   first obs. used      1998-12-17  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57514  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 16:45:10  

Additional Information
 Earth MOID = 2.02096 au 
 Jupiter MOID = 1.83038 au 
 T_jup = 3.189 
[ 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 15.3   n/a MPO352522  
diameter diameter 4.967 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.060   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249500 (2009 XL22)          Discovered 2009-Dec-15 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Alternate Designations
 2009 XL22 = 1998 YY1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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