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21866 (1999 TP247)
Classification: Main-belt Asteroid          SPK-ID: 2021866
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1049195138704091 2.9834e-08  
a 2.572785250309532 1.101e-08 au
q 2.302849872554098 7.5788e-08 au
i 5.180476505783969 3.7205e-06 deg
node 69.25973854613851 4.9122e-05 deg
peri 196.4781076656728 5.4393e-05 deg
M 173.0272441456246 2.3515e-05 deg
tp 2458476.037812755754
(2018-Dec-23.53781276)
9.8117e-05 TDB
period 1507.313999571227
4.13
9.6756e-06
2.649e-08
d
yr
n .2388354384702897 1.5331e-09 deg/d
Q 2.842720628064967 1.2165e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1090  
   data-arc span      10653 days (29.17 yr)  
   first obs. used      1991-12-13  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:54:22  

Additional Information
 Earth MOID = 1.28587 au 
 Jupiter MOID = 2.21556 au 
 T_jup = 3.415 
[ 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 14.95   n/a E2021B10  
diameter diameter 2.316 km 0.399 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.228   0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21866 (1999 TP247)          Discovered 1999-Oct-08 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TP247 = 1995 YM8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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