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21215 (1994 UQ)
Classification: Main-belt Asteroid          SPK-ID: 2021215
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1308603845901715 1.2707e-08  
a 2.677746757628972 1.1833e-08 au
q 2.32733578709056 3.269e-08 au
i 13.78320618610481 7.5631e-07 deg
node 61.37473116641612 4.173e-06 deg
peri 198.0576767276983 1.1413e-05 deg
M 133.5653096645509 9.2159e-06 deg
tp 2458606.694993856022
(2019-May-03.19499386)
3.9084e-05 TDB
period 1600.488949928053
4.38
1.0609e-05
2.905e-08
d
yr
n .2249312624221386 1.491e-09 deg/d
Q 3.028157728167383 1.3382e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2607  
   data-arc span      9624 days (26.35 yr)  
   first obs. used      1994-10-31  
   last obs. used      2021-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39527  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:55:14  

Additional Information
 Earth MOID = 1.3147 au 
 Jupiter MOID = 2.02415 au 
 T_jup = 3.325 
[ 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 13.39   n/a E2021B10  
diameter diameter 6.451 km 0.310 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.208   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21215 (1994 UQ)          Discovered 1994-Oct-31 by Kobayashi, T. at Oizumi
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 UQ = 1998 UY23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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