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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1081263348119947 4.2675e-08  
a 2.258612904112714 7.3881e-09 au
q 2.014397369031931 9.5606e-08 au
i 6.111498832719236 3.8277e-06 deg
node 276.4376334944654 4.4372e-05 deg
peri 116.2538033901153 4.8384e-05 deg
M 121.8037089846321 1.8569e-05 deg
tp 2458781.012381631936
(2019-Oct-24.51238163)		 6.3744e-05 TDB
period 1239.827127362408
3.39		 6.0833e-06
1.666e-08		 d
yr
n .290363061151807 1.4247e-09 deg/d
Q 2.502828439193498 8.1869e-09 au
   Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7792 days (21.33 yr)  
   first obs. used      1999-11-14  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:35  

Additional Information
 Earth MOID = 1.02857 au 
 Jupiter MOID = 2.87214 au 
 T_jup = 3.606 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457084.5 (2015-Mar-03.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1084123831850069 4.2839e-08  
q 2.013502000773872 9.6005e-08 au
tp 2457539.210103125910
(2016-May-30.71010313)		 6.3074e-05 TDB
node 276.5189905562522 4.4427e-05 deg
peri 115.7048194327749 4.8378e-05 deg
i 6.10755522521489 3.8258e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      959  
   data-arc span      7792 days (21.33 yr)  
   first obs. used      1999-11-14  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:35  

Additional Information
 Jupiter MOID = 2.87214 au 
 T_jup = 3.606 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.835155243920489E-15 -4.103348592055784E-15 -5.511704470862214E-13 -8.24296458507643E-15 -1.74074079282351E-13 -3.695769662193214E-15
q -4.103348592055784E-15 9.216937756421045E-15 1.248401536120631E-12 1.853040696619146E-14 3.888399240879352E-13 8.366012912768159E-15
tp -5.511704470862214E-13 1.248401536120631E-12 3.978388355834012E-9 5.876795839859804E-13 1.227705513905993E-9 1.544749686481272E-12
node -8.24296458507643E-15 1.853040696619146E-14 5.876795839859804E-13 1.973751832733567E-9 -1.962435455238155E-9 -3.326923202769169E-12
peri -1.74074079282351E-13 3.888399240879352E-13 1.227705513905993E-9 -1.962435455238155E-9 2.340474390003526E-9 3.819743687253069E-12
i -3.695769662193214E-15 8.366012912768159E-15 1.544749686481272E-12 -3.326923202769169E-12 3.819743687253069E-12 1.46367293454596E-11

[ 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

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