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3897 Louhi (1942 RT)
Classification: Main-belt Asteroid          SPK-ID: 2003897
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .157794891402879 3.7233e-08  
a 2.693639156091026 1.1759e-08 au
q 2.2685966579771 1.0273e-07 au
i 7.097253837064362 4.1396e-06 deg
node 188.8115186231154 2.729e-05 deg
peri 149.2139591437378 2.9258e-05 deg
M 124.3199419839774 1.0311e-05 deg
tp 2458042.870360371725
(2017-Oct-16.37036037)
4.6225e-05 TDB
period 1614.758397265433
4.42
1.0574e-05
2.895e-08
d
yr
n .2229435689014865 1.4599e-09 deg/d
Q 3.118681654204952 1.3614e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2109  
   data-arc span      27992 days (76.64 yr)  
   first obs. used      1942-09-05  
   last obs. used      2019-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48284  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:29:35  

Additional Information
 Earth MOID = 1.26252 au 
 Jupiter MOID = 2.30001 au 
 T_jup = 3.342 
[ 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 13.0   n/a MPO431542  
diameter diameter 10.770 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.127   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3897 Louhi (1942 RT)          Discovered 1942-Sep-08 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 RT = 1969 VG2 = 1973 TN = 1982 SA7 = 1988 AZ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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