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21872 (1999 UP3)
Classification: Main-belt Asteroid          SPK-ID: 2021872
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1412751348461317 4.5241e-08  
a 2.71252188401483 1.362e-08 au
q 2.329309989077552 1.2273e-07 au
i 4.806681419499228 5.2622e-06 deg
node 52.73534927174205 5.325e-05 deg
peri 4.250432314002814 5.5867e-05 deg
M 260.7040654387854 1.9082e-05 deg
tp 2459650.577466100693
(2022-Mar-12.07746610)
8.8413e-05 TDB
period 1631.767589602186
4.47
1.229e-05
3.365e-08
d
yr
n .2206196533709592 1.6617e-09 deg/d
Q 3.095733778952108 1.5545e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      17090 days (46.79 yr)  
   first obs. used      1972-10-09  
   last obs. used      2019-07-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4964  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:54:27  

Additional Information
 Earth MOID = 1.34054 au 
 Jupiter MOID = 2.24351 au 
 T_jup = 3.343 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO474053  
diameter diameter 4.603 km 0.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.209   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21872 (1999 UP3)          Discovered 1999-Oct-18 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 UP3 = 1972 TN10 = 1990 VU11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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