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49687 (1999 TQ178)
Classification: Main-belt Asteroid          SPK-ID: 2049687
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 .07987072743080081 4.0459e-08  
a 2.225520373389811 9.3723e-09 au
q 2.047766442255099 8.8291e-08 au
i 2.421780375155229 4.5122e-06 deg
node 269.5478999141249 9.3183e-05 deg
peri 311.9381042488814 9.8044e-05 deg
M 237.705050251243 3.2716e-05 deg
tp 2459412.456927673698
(2021-Jul-16.95692767)
0.00011108 TDB
period 1212.678808627898
3.32
7.6604e-06
2.097e-08
d
yr
n .296863437736928 1.8753e-09 deg/d
Q 2.403274304524522 1.0121e-08 au
  Orbit Determination Parameters
   # obs. used (total)      770  
   data-arc span      7892 days (21.61 yr)  
   first obs. used      1998-04-22  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:23:18  

Additional Information
 Earth MOID = 1.03992 au 
 Jupiter MOID = 2.57293 au 
 T_jup = 3.641 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456855.5 (2014-Jul-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0796949775792022 4.0491e-08  
q 2.047812790362009 8.8299e-08 au
tp 2456987.885322211454
(2014-Nov-26.38532221)
0.00010683 TDB
node 269.5982836015475 9.3252e-05 deg
peri 312.0556212307404 9.8118e-05 deg
i 2.420616439238213 4.5112e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      770  
   data-arc span      7892 days (21.61 yr)  
   first obs. used      1998-04-22  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57516  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:23:18  

Additional Information
 Jupiter MOID = 2.57293 au 
 T_jup = 3.641 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.639546953254624E-15 -3.559277482783825E-15 1.208170881833628E-12 1.053085876591594E-14 2.691754632242224E-13 1.041453931802047E-16
q -3.559277482783825E-15 7.796639593249961E-15 -2.489228952946262E-12 -2.298509533227014E-14 -5.476822469645219E-13 -1.841739314135203E-16
tp 1.208170881833628E-12 -2.489228952946262E-12 1.14135330433729E-8 3.925315377699699E-11 3.265907613688515E-9 -1.878492351921226E-12
node 1.053085876591594E-14 -2.298509533227014E-14 3.925315377699699E-11 8.695997650034067E-9 -8.676886088023684E-9 8.00714051936909E-11
peri 2.691754632242224E-13 -5.476822469645219E-13 3.265907613688515E-9 -8.676886088023684E-9 9.627210419214003E-9 -8.05729839980092E-11
i 1.041453931802047E-16 -1.841739314135203E-16 -1.878492351921226E-12 8.00714051936909E-11 -8.05729839980092E-11 2.035092181441783E-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 16.1   n/a MPO347863  

49687 (1999 TQ178)          Discovered 1999-Oct-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TQ178 = 1998 KO18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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