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73961 (1997 WP25)
Classification: Main-belt Asteroid          SPK-ID: 2073961
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2315080372006736 4.1345e-08  
a 3.175493817091475 2.0152e-08 au
q 2.440341476353753 1.3401e-07 au
i 28.91213498944493 6.1204e-06 deg
node 290.4751295310648 9.8779e-06 deg
peri 151.0687814745363 2.0298e-05 deg
M 38.89608805240979 1.4317e-05 deg
tp 2458977.184556507871
(2020-May-07.68455651)
8.1662e-05 TDB
period 2066.880338939009
5.66
1.9675e-05
5.387e-08
d
yr
n .1741755404112067 1.658e-09 deg/d
Q 3.910646157829197 2.4817e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1391  
   data-arc span      8510 days (23.30 yr)  
   first obs. used      1997-11-30  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44156  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:18:17  

Additional Information
 Earth MOID = 1.48321 au 
 Jupiter MOID = 1.37889 au 
 T_jup = 2.969 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457644.5 (2016-Sep-13.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2307275181798575 4.1428e-08  
q 2.441950903363598 1.3425e-07 au
tp 2456913.322746089674
(2014-Sep-12.82274609)
7.9979e-05 TDB
node 290.4926978175414 9.8788e-06 deg
peri 151.2822470224764 2.0356e-05 deg
i 28.90508280145342 6.1211e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1391  
   data-arc span      8510 days (23.30 yr)  
   first obs. used      1997-11-30  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44156  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 07:18:17  

Additional Information
 Jupiter MOID = 1.37889 au 
 T_jup = 2.969 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.716258347796401E-15 -5.525350221297939E-15 7.008592317865981E-13 5.011979623182042E-16 1.20521999058168E-13 -8.075381864835735E-15
q -5.525350221297939E-15 1.802244363120119E-14 -2.277295246349149E-12 -3.104741926661797E-16 -3.738058871423163E-13 2.84262512704676E-14
tp 7.008592317865981E-13 -2.277295246349149E-12 6.396584121109492E-9 1.302794303751746E-11 1.44032623458456E-9 5.888244158733893E-12
node 5.011979623182042E-16 -3.104741926661797E-16 1.302794303751746E-11 9.759058661019168E-11 -8.159166853903444E-11 1.234424631441257E-11
peri 1.20521999058168E-13 -3.738058871423163E-13 1.44032623458456E-9 -8.159166853903444E-11 4.143695313621591E-10 -8.731802604041669E-12
i -8.075381864835735E-15 2.84262512704676E-14 5.888244158733893E-12 1.234424631441257E-11 -8.731802604041669E-12 3.746812476224679E-11

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 13.50   n/a MPCxxxxx  
diameter diameter 14.447 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.041   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

73961 (1997 WP25)          Discovered 1997-Nov-30 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 WP25 = 2001 QM126 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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