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JPL Small-Body Database Browser
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201990 (2004 PC78)
Classification: Main-belt Asteroid          SPK-ID: 2201990
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07831580585506734 5.5251e-08  
a 2.53678640983438 2.0701e-08 au
q 2.338115937866017 1.4277e-07 au
i 3.454624357197938 5.2624e-06 deg
node 225.0159972485399 0.00011613 deg
peri 60.18896078231392 0.00012365 deg
M 3.847844976997627 4.4062e-05 deg
tp 2458984.726090440083
(2020-May-15.22609044)
0.0001806 TDB
period 1475.789039193849
4.04
1.8065e-05
4.946e-08
d
yr
n .2439373043430721 2.986e-09 deg/d
Q 2.735456881802742 2.2323e-08 au
  Orbit Determination Parameters
   # obs. used (total)      235  
   data-arc span      6792 days (18.60 yr)  
   first obs. used      2000-09-19  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58625  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:18:08  

Additional Information
 Earth MOID = 1.32409 au 
 Jupiter MOID = 2.35835 au 
 T_jup = 3.441 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457173.5 (2015-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07705796051868716 5.5423e-08  
q 2.340257659487639 1.4276e-07 au
tp 2457510.957383136637
(2016-May-02.45738314)
0.00018099 TDB
node 225.0491733709083 0.00011607 deg
peri 60.43654652188857 0.00012377 deg
i 3.45553019121744 5.2648e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      235  
   data-arc span      6792 days (18.60 yr)  
   first obs. used      2000-09-19  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58625  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:18:08  

Additional Information
 Jupiter MOID = 2.35835 au 
 T_jup = 3.441 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.071738645060662E-15 -7.841848305966884E-15 4.819275238206526E-12 6.423837062763732E-14 1.198889405711157E-12 -3.120700580141292E-15
q -7.841848305966884E-15 2.037981263190692E-14 -1.201841100191312E-11 -1.629042424489048E-13 -3.014951099715128E-12 8.354814208686422E-15
tp 4.819275238206526E-12 -1.201841100191312E-11 3.275586558686555E-8 3.083321608819756E-10 7.846362709889508E-9 -7.861584088525006E-12
node 6.423837062763732E-14 -1.629042424489048E-13 3.083321608819756E-10 1.347207440086867E-8 -1.337070331140875E-8 -2.127212549132992E-10
peri 1.198889405711157E-12 -3.014951099715128E-12 7.846362709889508E-9 -1.337070331140875E-8 1.531874587895405E-8 2.103391917800062E-10
i -3.120700580141292E-15 8.354814208686422E-15 -7.861584088525006E-12 -2.127212549132992E-10 2.103391917800062E-10 2.771789622889451E-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 16.4   n/a MPO433323  

201990 (2004 PC78)          Discovered 2004-Aug-09 by LINEAR at Socorro
Reference: 20081212/Numbers.arcLast Updated: 2008-12-12
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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