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1950 Wempe (1942 EO)
Classification: Main-belt Asteroid          SPK-ID: 2001950
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08440169831981628 1.4698e-08  
a 2.178136677710508 4.2545e-09 au
q 1.994298242939058 3.1291e-08 au
i 4.220382150879816 6.875e-07 deg
node 69.90455880157604 1.4637e-05 deg
peri 53.73004766334472 2.3173e-05 deg
M 289.9220564809304 1.9013e-05 deg
tp 2459625.062494419344
(2022-Feb-14.56249442)
6.2156e-05 TDB
period 1174.156858192809
3.21
3.4402e-06
9.419e-09
d
yr
n .3066029870609369 8.9833e-10 deg/d
Q 2.361975112481957 4.6136e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3250  
   data-arc span      28984 days (79.35 yr)  
   first obs. used      1942-03-23  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41125  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:17:26  

Additional Information
 Earth MOID = 1.0139 au 
 Jupiter MOID = 2.6746 au 
 T_jup = 3.675 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456839.5 (2014-Jul-01.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08399095949272679 1.4458e-08  
q 1.995667689237726 3.0724e-08 au
tp 2457274.246220329410
(2015-Sep-08.74622033)
6.138e-05 TDB
node 69.97016745730961 1.462e-05 deg
peri 53.16478761504417 2.3258e-05 deg
i 4.222532205744953 6.8773e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3250  
   data-arc span      28984 days (79.35 yr)  
   first obs. used      1942-03-23  
   last obs. used      2021-07-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41125  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:17:26  

Additional Information
 Jupiter MOID = 2.6746 au 
 T_jup = 3.675 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.090223230257729E-16 -4.408142102292522E-16 6.970294975218396E-13 1.0111996497101E-13 1.161120419477722E-13 -2.046716112856278E-15
q -4.408142102292522E-16 9.439367006710851E-16 -1.489462168323316E-12 -2.201160009140007E-13 -2.446592506542897E-13 4.460703380917918E-15
tp 6.970294975218396E-13 -1.489462168323316E-12 3.767444359373124E-9 7.084023564547861E-11 1.113037223306846E-9 1.256226408266917E-11
node 1.0111996497101E-13 -2.201160009140007E-13 7.084023564547861E-11 2.13735703819859E-10 -1.908433908979483E-10 -7.568442846229399E-12
peri 1.161120419477722E-13 -2.446592506542897E-13 1.113037223306846E-9 -1.908433908979483E-10 5.409513326097537E-10 1.179935253444605E-11
i -2.046716112856278E-15 4.460703380917918E-15 1.256226408266917E-11 -7.568442846229399E-12 1.179935253444605E-11 4.729725825036283E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.25   n/a MPCxxxxx  
diameter diameter 6.311 km 1.349 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 16.788 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pray, D.P.; Galad, A.; Gajdos, S.; Vilagi, J.; et al. (2006) Minor Planet Bull. 33, 92-95.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.323   0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

1950 Wempe (1942 EO)          Discovered 1942-Mar-23 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 EO = 1968 HH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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