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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04260300052316201 1.5404e-08  
a 2.327790090616727 6.8942e-09 au
q 2.228619248168371 3.6023e-08 au
i 8.522775746551925 1.7048e-06 deg
node 47.11319377854036 3.9357e-06 deg
peri 102.519003898409 3.5043e-05 deg
M 302.5484816486161 3.4736e-05 deg
tp 2459407.520407723759
(2021-Jul-12.02040772)
0.00012541 TDB
period 1297.221534246155
3.55
5.763e-06
1.578e-08
d
yr
n .2775162071366662 1.2329e-09 deg/d
Q 2.426960933065082 7.188e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2704  
   data-arc span      29555 days (80.92 yr)  
   first obs. used      1940-04-03  
   last obs. used      2021-03-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41179  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:27:50  

Additional Information
 Earth MOID = 1.25421 au 
 Jupiter MOID = 2.56204 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 12.79   n/a E2021B10  
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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