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JPL Small-Body Database Browser
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20937 (1005 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2020937
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09596625199311724 4.1511e-08  
a 3.031093277413841 1.9036e-08 au
q 2.740210616138901 1.3262e-07 au
i 2.199784882879153 4.2322e-06 deg
node 207.3026904890863 0.00010855 deg
peri 166.1339058449334 0.00011058 deg
M 220.5236242787552 2.2577e-05 deg
tp 2459347.284906787145
(2021-May-12.78490679)
0.00012391 TDB
period 1927.513279959874
5.28
1.8158e-05
4.971e-08
d
yr
n .1867691412260954 1.7595e-09 deg/d
Q 3.321975938688782 2.0863e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1279  
   data-arc span      16670 days (45.64 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57505  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:56:55  

Additional Information
 Earth MOID = 1.7399 au 
 Jupiter MOID = 2.14106 au 
 T_jup = 3.235 
[ 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 13.8   n/a MPO435894  
diameter diameter 4.214 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20937 (1005 T-2)          Discovered 1973-Sep-29 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1005 T-2 = 1998 KA30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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