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20930 (2130 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2020930
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1622712614267459 2.6809e-08  
a 2.267212699827027 6.3042e-09 au
q 1.899309235103357 6.2506e-08 au
i 1.6014752542788 3.3396e-06 deg
node 4.842145764773727 0.00010828 deg
peri 41.38208956256359 0.00010884 deg
M 326.349644020566 1.1034e-05 deg
tp 2459317.053142493217
(2021-Apr-12.55314249)
3.8379e-05 TDB
period 1246.914930801983
3.41
5.2007e-06
1.424e-08
d
yr
n .2887125585772379 1.2042e-09 deg/d
Q 2.635116164550697 7.3272e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1543  
   data-arc span      18220 days (49.88 yr)  
   first obs. used      1971-03-25  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47245  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:34:56  

Additional Information
 Earth MOID = .9082 au 
 Jupiter MOID = 2.74197 au 
 T_jup = 3.597 
[ 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 15.44   n/a E2021B10  
diameter diameter 1.890 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.312   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20930 (2130 T-1)          Discovered 1971-Mar-25 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2130 T-1 = 2000 UW9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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