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JPL Small-Body Database Browser
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49932 (1999 XK178)
Classification: Main-belt Asteroid          SPK-ID: 2049932
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06911824253271666 4.62e-08  
a 2.175720837924641 8.8633e-09 au
q 2.02533883736548 9.8893e-08 au
i 3.123216048239148 4.7423e-06 deg
node 18.20609540840031 9.684e-05 deg
peri 334.5854602232898 0.00010444 deg
M 237.5919618358987 4.0514e-05 deg
tp 2459399.075519163180
(2021-Jul-03.57551916)
0.00013248 TDB
period 1172.203958586319
3.21
7.1629e-06
1.961e-08
d
yr
n .3071137896805613 1.8767e-09 deg/d
Q 2.326102838483802 9.4759e-09 au
  Orbit Determination Parameters
   # obs. used (total)      927  
   data-arc span      9982 days (27.33 yr)  
   first obs. used      1992-09-30  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55699  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:37:17  

Additional Information
 Earth MOID = 1.02029 au 
 Jupiter MOID = 2.91325 au 
 T_jup = 3.680 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456110.5 (2012-Jul-02.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06905722118771412 4.6271e-08  
q 2.026214254789406 9.9097e-08 au
tp 2455882.041140169294
(2011-Nov-16.54114017)
0.00012891 TDB
node 18.25489336236718 9.6785e-05 deg
peri 334.6408351242226 0.00010438 deg
i 3.12462722858798 4.7417e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      927  
   data-arc span      9982 days (27.33 yr)  
   first obs. used      1992-09-30  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55699  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:37:17  

Additional Information
 Jupiter MOID = 2.91325 au 
 T_jup = 3.680 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.14103684644194E-15 -4.570113209564702E-15 2.352202725809423E-13 2.266506525591474E-15 -4.302481007379083E-15 -2.315051667245898E-16
q -4.570113209564702E-15 9.820183659830833E-15 -4.400812597286796E-13 -3.721509134292161E-15 2.741071770122001E-14 5.428253335304198E-16
tp 2.352202725809423E-13 -4.400812597286796E-13 1.661763199696955E-8 3.715669998480871E-11 5.060443244024249E-9 -4.607454577900245E-12
node 2.266506525591474E-15 -3.721509134292161E-15 3.715669998480871E-11 9.367421001478108E-9 -9.341178939271341E-9 6.593518143353466E-11
peri -4.302481007379083E-15 2.741071770122001E-14 5.060443244024249E-9 -9.341178939271341E-9 1.089422142016819E-8 -6.721971598654476E-11
i -2.315051667245898E-16 5.428253335304198E-16 -4.607454577900245E-12 6.593518143353466E-11 -6.721971598654476E-11 2.248372059040559E-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 15.6   n/a MPO417162  

49932 (1999 XK178)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XK178 = 1997 EO34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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