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JPL Small-Body Database Browser
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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1718638672797963 3.4225e-08  
a 2.550174103459434 1.1767e-08 au
q 2.111891319802108 8.7936e-08 au
i 4.229411705818146 4.7794e-06 deg
node 72.21530534235457 6.6314e-05 deg
peri 249.7929909384738 6.8808e-05 deg
M 356.4883140007236 1.7738e-05 deg
tp 2458615.009964473445
(2019-May-11.50996447)
7.3279e-05 TDB
period 1487.486982468423
4.07
1.0295e-05
2.819e-08
d
yr
n .2420189246984838 1.6751e-09 deg/d
Q 2.988456887116759 1.3789e-08 au
  Orbit Determination Parameters
   # obs. used (total)      854  
   data-arc span      8757 days (23.98 yr)  
   first obs. used      1995-12-03  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55055  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 09:11:53  

Additional Information
 Earth MOID = 1.10297 au 
 Jupiter MOID = 2.32733 au 
 T_jup = 3.416 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456982.5 (2014-Nov-21.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1733340077220827 3.4509e-08  
q 2.108013981681906 8.8991e-08 au
tp 2457128.616198874632
(2015-Apr-16.11619887)
7.44e-05 TDB
node 72.24055238732518 6.6362e-05 deg
peri 250.0714996515015 6.8805e-05 deg
i 4.228793564948798 4.7798e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      854  
   data-arc span      8757 days (23.98 yr)  
   first obs. used      1995-12-03  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55055  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 09:11:53  

Additional Information
 Jupiter MOID = 2.32733 au 
 T_jup = 3.416 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.190866603120301E-15 -3.052448131317324E-15 1.509954514781287E-12 -3.758418551999016E-17 3.598975450351146E-13 -2.657567811686005E-15
q -3.052448131317324E-15 7.919329196333742E-15 -4.047120889632791E-12 -4.761176396704227E-16 -9.694829721430706E-13 7.143326009770152E-15
tp 1.509954514781287E-12 -4.047120889632791E-12 5.535370364714063E-9 2.289478789659686E-11 1.385714958175413E-9 -8.899264461191115E-12
node -3.758418551999016E-17 -4.761176396704227E-16 2.289478789659686E-11 4.403894576109028E-9 -4.385765186295846E-9 -2.033616725422069E-10
peri 3.598975450351146E-13 -9.694829721430706E-13 1.385714958175413E-9 -4.385765186295846E-9 4.734136342621805E-9 2.005716171951262E-10
i -2.657567811686005E-15 7.143326009770152E-15 -8.899264461191115E-12 -2.033616725422069E-10 2.005716171951262E-10 2.284655097903002E-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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