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101565 (1999 AD21)
Classification: Main-belt Asteroid          SPK-ID: 2101565
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08541592637207397 3.1913e-08  
a 2.445606147888733 8.901e-09 au
q 2.236712433225578 8.1644e-08 au
i 4.979863247420985 4.6852e-06 deg
node 354.7633843088662 3.4927e-05 deg
peri 85.47147909593276 4.6652e-05 deg
M 242.4276740175511 3.2881e-05 deg
tp 2459456.726820059106
(2021-Aug-30.22682006)
0.00012881 TDB
period 1396.941447307896
3.82
7.6264e-06
2.088e-08
d
yr
n .2577058621130978 1.4069e-09 deg/d
Q 2.654499862551889 9.6613e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1445  
   data-arc span      7991 days (21.88 yr)  
   first obs. used      1998-12-14  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5101  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:49  

Additional Information
 Earth MOID = 1.25892 au 
 Jupiter MOID = 2.50986 au 
 T_jup = 3.489 
[ 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 14.9   n/a MPO337993  
diameter diameter 5.652 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101565 (1999 AD21)          Discovered 1999-Jan-13 by Kagawa, T. at Gekko
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1999 AD21 = 2001 QZ66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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