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24721 (1991 TJ)
Classification: Main-belt Asteroid          SPK-ID: 2024721
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2423065135392948 4.0831e-08  
a 2.317223957271688 6.5175e-09 au
q 1.755745499095458 9.5241e-08 au
i 4.515612634505579 3.3553e-06 deg
node 79.59396261963118 4.9992e-05 deg
peri 274.152649115633 5.0435e-05 deg
M 111.8550534846114 7.7916e-06 deg
tp 2458800.183444839460
(2019-Nov-12.68344484)
2.7331e-05 TDB
period 1288.399185984216
3.53
5.4357e-06
1.488e-08
d
yr
n .2794165068685555 1.1788e-09 deg/d
Q 2.878702415447918 8.0967e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1430  
   data-arc span      10783 days (29.52 yr)  
   first obs. used      1991-09-12  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51661  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:37:03  

Additional Information
 Earth MOID = .756284 au 
 Jupiter MOID = 2.57243 au 
 T_jup = 3.536 
[ 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 14.89   n/a MPCxxxxx  
diameter diameter 2.975 km 0.206 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.263   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

24721 (1991 TJ)          Discovered 1991-Oct-01 by McNaught, R. H. at Siding Spring
Reference: 20010606/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 TJ = 2000 EP88 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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