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JPL Small-Body Database Browser
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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08386998414128564 3.0014e-08  
a 2.179425887493628 5.0812e-09 au
q 1.99663747287243 6.5065e-08 au
i 4.22095583677649 3.2716e-06 deg
node 69.93145728747312 5.8935e-05 deg
peri 53.37623491390384 6.5138e-05 deg
M 168.8909362693417 2.7505e-05 deg
tp 2458449.165172888931
(2018-Nov-26.66517289)
8.9631e-05 TDB
period 1175.199463892215
3.22
4.1098e-06
1.125e-08
d
yr
n .3063309770476698 1.0713e-09 deg/d
Q 2.362214302114825 5.5073e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2591  
   data-arc span      28172 days (77.13 yr)  
   first obs. used      1942-03-23  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42897  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:28:49  

Additional Information
 Earth MOID = 1.01575 au 
 Jupiter MOID = 2.67608 au 
 T_jup = 3.674 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2   n/a MPO265967  
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. 2019-August); 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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