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21370 (1997 TB28)
Classification: Jupiter Trojan          SPK-ID: 2021370
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07337331229646109 4.085e-08  
a 5.191833166352102 9.537e-08 au
q 4.810891170046225 2.536e-07 au
i 7.753279887501133 4.4733e-06 deg
node 77.20055762919461 4.1584e-05 deg
peri 48.42650518946818 6.2365e-05 deg
M 258.0976024017419 4.9773e-05 deg
tp 2460423.598465092098
(2024-Apr-23.09846509)
0.00061976 TDB
period 4320.952772564421
11.83
0.00011906
3.26e-07
d
yr
n .08331495828554158 2.2957e-09 deg/d
Q 5.572775162657979 1.0237e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1147  
   data-arc span      10845 days (29.69 yr)  
   first obs. used      1991-05-04  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54398  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:52:15  

Additional Information
 Earth MOID = 3.83257 au 
 Jupiter MOID = .0554281 au 
 T_jup = 2.976 
[ 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 11.57   n/a E2021B10  
diameter diameter 29.196 km 0.458 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.052   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

21370 (1997 TB28)          Discovered 1997-Oct-01 by Uppsala-DLR Trojan Survey at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 TB28 = 1996 RL33 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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