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102993 (1999 XL91)
Classification: Main-belt Asteroid          SPK-ID: 2102993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388948322885529 3.0868e-08  
a 2.247982718212385 7.4479e-09 au
q 1.93574953557871 7.1182e-08 au
i 5.283499486326139 3.5606e-06 deg
node 86.55260095961177 3.9725e-05 deg
peri 12.88623092971089 4.29e-05 deg
M 83.40753492344383 1.4445e-05 deg
tp 2458915.272980098843
(2020-Mar-06.77298010)
4.9628e-05 TDB
period 1231.084544803578
3.37
6.1182e-06
1.675e-08
d
yr
n .2924250828422502 1.4533e-09 deg/d
Q 2.560215900846059 8.4824e-09 au
  Orbit Determination Parameters
   # obs. used (total)      952  
   data-arc span      7485 days (20.49 yr)  
   first obs. used      1999-11-16  
   last obs. used      2020-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:51:19  

Additional Information
 Earth MOID = .952808 au 
 Jupiter MOID = 2.58101 au 
 T_jup = 3.611 
[ 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 15.99   n/a E2021B55  
diameter diameter 4.159 km 0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102993 (1999 XL91)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 XL91 = 2002 TO85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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