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2194 Arpola (1940 GE)
Classification: Main-belt Asteroid          SPK-ID: 2002194
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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04260881160325748 3.9628e-08  
a 2.327335146264766 7.6912e-09 au
q 2.228170161479931 9.1316e-08 au
i 8.523591335813849 4.0049e-06 deg
node 47.11436169852715 2.7938e-05 deg
peri 102.7762038264486 5.4516e-05 deg
M 246.7797377434267 4.7695e-05 deg
tp 2459408.357520528390
(2021-Jul-12.85752053)
0.00017241 TDB
period 1296.841258479737
3.55
6.4286e-06
1.76e-08
d
yr
n .2775975838569643 1.3761e-09 deg/d
Q 2.426500131049601 8.0189e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2378  
   data-arc span      29128 days (79.75 yr)  
   first obs. used      1940-04-03  
   last obs. used      2020-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42899  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:14:58  

Additional Information
 Earth MOID = 1.25396 au 
 Jupiter MOID = 2.56327 au 
 T_jup = 3.557 
[ 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 12.7   n/a MPO384769  
diameter diameter 9.020 km 0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.190   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2194 Arpola (1940 GE)          Discovered 1940-Apr-03 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1940 GE = 1965 JC = 1973 QB1 = 1977 VP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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