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21251 (1995 YX3)
Classification: Main-belt Asteroid          SPK-ID: 2021251
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 .1481910150196892 4.4547e-08  
a 2.78428949063524 1.6672e-08 au
q 2.371682804909351 1.2645e-07 au
i 13.48283683983746 4.7399e-06 deg
node 105.8225534802091 2.0067e-05 deg
peri 254.3754981138455 2.6081e-05 deg
M 220.5230379822022 1.9569e-05 deg
tp 2459857.960987404131
(2022-Oct-05.46098740)
9.4367e-05 TDB
period 1696.953762409057
4.65
1.5242e-05
4.173e-08
d
yr
n .2121448491848894 1.9054e-09 deg/d
Q 3.19689617636113 1.9142e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1368  
   data-arc span      9146 days (25.04 yr)  
   first obs. used      1995-12-31  
   last obs. used      2021-01-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49897  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:13:21  

Additional Information
 Earth MOID = 1.40731 au 
 Jupiter MOID = 2.32449 au 
 T_jup = 3.276 
[ 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 14.14   n/a E2021B10  
diameter diameter 3.979 km 0.665 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.307   0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21251 (1995 YX3)          Discovered 1995-Dec-31 by Urata, T. at Oohira
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 YX3 = 1999 VK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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