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102991 (1999 XF90)
Classification: Main-belt Asteroid          SPK-ID: 2102991
[ 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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1081263336153001 4.2725e-08  
a 2.258612905049442 7.6676e-09 au
q 2.014397372570244 9.5818e-08 au
i 6.11149969036897 4.0794e-06 deg
node 276.4376320799536 4.4419e-05 deg
peri 116.2538029527681 4.931e-05 deg
M 121.8037103265895 1.9833e-05 deg
tp 2458781.012376749318
(2019-Oct-24.51237675)		 6.8313e-05 TDB
period 1239.827128133709
3.39		 6.3135e-06
1.729e-08		 d
yr
n .2903630609711711 1.4786e-09 deg/d
Q 2.50282843752864 8.4966e-09 au
   Orbit Determination Parameters
   # obs. used (total)      929  
   data-arc span      7735 days (21.18 yr)  
   first obs. used      1999-11-14  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49835  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:33:27  

Additional Information
 Earth MOID = 1.02857 au 
 Jupiter MOID = 2.87214 au 
 T_jup = 3.606 
[ 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 15.69   n/a E2021B55  
diameter diameter 1.746 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.401   0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102991 (1999 XF90)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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