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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1483406508032227 3.7657e-08  
a 2.784089017782444 1.5359e-08 au
q 2.371095440990491 1.1032e-07 au
i 13.48295966016688 3.9005e-06 deg
node 105.8216653350101 1.7029e-05 deg
peri 254.3792657514922 2.3489e-05 deg
M 262.1168058643171 1.9484e-05 deg
tp 2459857.848098271667
(2022-Oct-05.34809827)
9.3309e-05 TDB
period 1696.77049103626
4.65
1.4041e-05
3.844e-08
d
yr
n .2121677633491486 1.7557e-09 deg/d
Q 3.197082594574397 1.7638e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1585  
   data-arc span      9309 days (25.49 yr)  
   first obs. used      1995-12-31  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47955  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:06:48  

Additional Information
 Earth MOID = 1.40759 au 
 Jupiter MOID = 2.32414 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 14.15   n/a MPO614063  
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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