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97221 (1999 XH50)
Classification: Main-belt Asteroid          SPK-ID: 2097221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1719055002519442 3.4226e-08  
a 2.550660829217068 1.1645e-08 au
q 2.112188203397469 8.7956e-08 au
i 4.229207350604574 4.7763e-06 deg
node 72.21653142586517 6.6085e-05 deg
peri 249.8768768889661 6.8576e-05 deg
M 93.20854135530435 1.7632e-05 deg
tp 2458615.260591998674
(2019-May-11.76059200)
7.3138e-05 TDB
period 1487.912855022756
4.07
1.0189e-05
2.79e-08
d
yr
n .2419496536942644 1.6569e-09 deg/d
Q 2.989133455036667 1.3647e-08 au
  Orbit Determination Parameters
   # obs. used (total)      865  
   data-arc span      8801 days (24.10 yr)  
   first obs. used      1995-12-03  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54345  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:37:23  

Additional Information
 Earth MOID = 1.10415 au 
 Jupiter MOID = 2.32958 au 
 T_jup = 3.416 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457024.5 (2015-Jan-02.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1733424759487464 3.4482e-08  
q 2.108034631663382 8.8869e-08 au
tp 2457128.598116213118
(2015-Apr-16.09811621)
7.4362e-05 TDB
node 72.24007644073511 6.6133e-05 deg
peri 250.0656559862523 6.8579e-05 deg
i 4.228740988641598 4.7772e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      865  
   data-arc span      8801 days (24.10 yr)  
   first obs. used      1995-12-03  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54345  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:37:23  

Additional Information
 Jupiter MOID = 2.32958 au 
 T_jup = 3.416 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.189026741392771E-15 -3.046133136112592E-15 1.512063486276476E-12 6.263713330651472E-16 3.594321974589827E-13 -2.64617602553654E-15
q -3.046133136112592E-15 7.897725831827047E-15 -4.05468030742757E-12 -2.269282051581137E-15 -9.684622907141252E-13 7.113599359385655E-15
tp 1.512063486276476E-12 -4.05468030742757E-12 5.529702231528436E-9 2.443243692916689E-11 1.383250221236575E-9 -8.850460520664408E-12
node 6.263713330651472E-16 -2.269282051581137E-15 2.443243692916689E-11 4.37356859211402E-9 -4.355130430128644E-9 -2.041124872087451E-10
peri 3.594321974589827E-13 -9.684622907141252E-13 1.383250221236575E-9 -4.355130430128644E-9 4.703021477597088E-9 2.013318918143275E-10
i -2.64617602553654E-15 7.113599359385655E-15 -8.850460520664408E-12 -2.041124872087451E-10 2.013318918143275E-10 2.282168379635289E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO439675  
diameter diameter 3.843 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

97221 (1999 XH50)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20050224/Numbers.arcLast Updated: 2005-02-28

Alternate Designations
 1999 XH50 = 2002 LJ17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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