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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07325589622710731 4.7612e-08  
a 5.190596961690472 1.044e-07 au
q 4.810355129308137 2.6832e-07 au
i 7.753499784388379 5.4059e-06 deg
node 77.19619208151443 4.2621e-05 deg
peri 48.66780830243204 6.3184e-05 deg
M 241.1667651190908 4.9782e-05 deg
tp 2460426.303931972109
(2024-Apr-25.80393197)
0.00062487 TDB
period 4319.409599716451
11.83
0.00013032
3.568e-07
d
yr
n .08334472378438763 2.5145e-09 deg/d
Q 5.570838794072808 1.1205e-07 au
  Orbit Determination Parameters
   # obs. used (total)      916  
   data-arc span      10431 days (28.56 yr)  
   first obs. used      1991-05-04  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56982  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:50:53  

Additional Information
 Earth MOID = 3.83214 au 
 Jupiter MOID = .0538296 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 11.6   n/a MPO502325  
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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