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21190 (1994 JQ)
Classification: Main-belt Asteroid          SPK-ID: 2021190
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05164039136164279 3.3796e-08  
a 2.537028048138344 1.1761e-08 au
q 2.406014926837015 8.8135e-08 au
i 2.32558711058161 3.5712e-06 deg
node 39.85942345184912 8.9984e-05 deg
peri 7.51716342790791 9.9385e-05 deg
M 22.81209493974994 4.0537e-05 deg
tp 2459106.970416717745
(2020-Sep-14.47041672)
0.00016652 TDB
period 1475.999905775459
4.04
1.0264e-05
2.81e-08
d
yr
n .2439024545945778 1.696e-09 deg/d
Q 2.668041169439673 1.2369e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1083  
   data-arc span      9775 days (26.76 yr)  
   first obs. used      1994-04-13  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48685  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:17  

Additional Information
 Earth MOID = 1.41435 au 
 Jupiter MOID = 2.50866 au 
 T_jup = 3.444 
[ 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 15.0   n/a MPO431744  
diameter diameter 2.595 km 0.720 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.288   0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21190 (1994 JQ)          Discovered 1994-May-10 by Vagnozzi, A. at Stroncone
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 JQ = 1998 HU85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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