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JPL Small-Body Database Browser
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108957 (2001 PC31)
Classification: Main-belt Asteroid          SPK-ID: 2108957
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09477503930164791 6.511e-08  
a 2.545529483633634 2.1973e-08 au
q 2.304276826778753 1.6166e-07 au
i 13.79965788686131 8.6276e-06 deg
node 253.211835582187 3.7195e-05 deg
peri 138.1871099284594 6.8909e-05 deg
M 173.320855401473 6.011e-05 deg
tp 2458286.309700133238
(2018-Jun-16.80970013)
0.00024379 TDB
period 1483.425104015782
4.06
1.9207e-05
5.259e-08
d
yr
n .2426816150174643 3.1422e-09 deg/d
Q 2.786782140488516 2.4056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      6779 days (18.56 yr)  
   first obs. used      2001-07-13  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:16:46  

Additional Information
 Earth MOID = 1.32987 au 
 Jupiter MOID = 2.60185 au 
 T_jup = 3.396 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457056.5 (2015-Feb-03.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09318664218153418 6.4983e-08  
q 2.309346062964159 1.6089e-07 au
tp 2456802.201785477669
(2014-May-24.70178548)
0.00024201 TDB
node 253.3277757430756 3.7183e-05 deg
peri 138.2313527084488 6.9906e-05 deg
i 13.79733537471331 8.6317e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      6779 days (18.56 yr)  
   first obs. used      2001-07-13  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:16:46  

Additional Information
 Jupiter MOID = 2.60185 au 
 T_jup = 3.396 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.222842544075562E-15 -1.038068026022069E-14 2.356642263044816E-12 5.963890926448518E-14 5.507615432179394E-13 1.152179870080259E-14
q -1.038068026022069E-14 2.588610422601242E-14 -4.393487342229712E-12 -1.449789232250588E-13 -1.003763853533391E-12 -2.665924324657145E-14
tp 2.356642263044816E-12 -4.393487342229712E-12 5.856861212789316E-8 8.596201189193133E-11 1.442515783112189E-8 7.626699437479473E-11
node 5.963890926448518E-14 -1.449789232250588E-13 8.596201189193133E-11 1.382557717300002E-9 -1.318336480135626E-9 1.091553264883982E-10
peri 5.507615432179394E-13 -1.003763853533391E-12 1.442515783112189E-8 -1.318336480135626E-9 4.886882198661148E-9 -8.66939929934091E-11
i 1.152179870080259E-14 -2.665924324657145E-14 7.626699437479473E-11 1.091553264883982E-10 -8.66939929934091E-11 7.450573604523925E-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 MPO422364  

108957 (2001 PC31)          Discovered 2001-Aug-10 by NEAT at Palomar
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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