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100237 (1994 PG31)
Classification: Main-belt Asteroid          SPK-ID: 2100237
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2367701276699789 4.4633e-08  
a 2.58025674031021 1.3945e-08 au
q 1.969329022485638 1.101e-07 au
i 3.9465935872505 4.3425e-06 deg
node 260.0739683568085 7.4814e-05 deg
peri 39.87562806841797 7.5735e-05 deg
M 147.8513707332596 1.2972e-05 deg
tp 2458578.750187229956
(2019-Apr-05.25018723)
5.2888e-05 TDB
period 1513.884730910138
4.14
1.2273e-05
3.36e-08
d
yr
n .2377988182650935 1.9278e-09 deg/d
Q 3.191184458134782 1.7247e-08 au
  Orbit Determination Parameters
   # obs. used (total)      769  
   data-arc span      9646 days (26.41 yr)  
   first obs. used      1994-08-12  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53168  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:24:47  

Additional Information
 Earth MOID = .953664 au 
 Jupiter MOID = 2.0468 au 
 T_jup = 3.382 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.85   n/a E2021B55  
diameter diameter 1.761 km 0.363 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.328   0.140 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100237 (1994 PG31)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1994 PG31 = 1998 RJ16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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