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18420 (1993 TR25)
Classification: Main-belt Asteroid          SPK-ID: 2018420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132750206418779 3.1596e-08  
a 2.382959043689584 7.4599e-09 au
q 2.066620738752295 7.625e-08 au
i 3.599756510698038 3.5741e-06 deg
node 87.39259558197854 5.732e-05 deg
peri 356.686964275606 5.9365e-05 deg
M 88.17281748132825 1.4057e-05 deg
tp 2458871.416951510909
(2020-Jan-22.91695151)
5.2591e-05 TDB
period 1343.610205958999
3.68
6.3093e-06
1.727e-08
d
yr
n .267934850750148 1.2582e-09 deg/d
Q 2.699297348626872 8.4502e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1191  
   data-arc span      26057 days (71.34 yr)  
   first obs. used      1949-11-19  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53402  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:43:33  

Additional Information
 Earth MOID = 1.08239 au 
 Jupiter MOID = 2.49635 au 
 T_jup = 3.522 
[ 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 15.48   n/a E2021B10  
diameter diameter 4.428 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.048   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18420 (1993 TR25)          Discovered 1993-Oct-09 by Elst, E. W. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 TR25 = 1949 WY = 1980 DF4 = 2000 QG58 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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