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21371 (1997 TD28)
Classification: Jupiter Trojan          SPK-ID: 2021371
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07137585725090305 3.981e-08  
a 5.229190447779134 1.0114e-07 au
q 4.855952496840665 2.3679e-07 au
i 7.868829892484 4.3638e-06 deg
node 61.33109474303017 4.271e-05 deg
peri 55.25123019747526 6.4386e-05 deg
M 244.4193005175112 5.1278e-05 deg
tp 2460602.774166586140
(2024-Oct-19.27416659)
0.00064976 TDB
period 4367.672995849047
11.96
0.00012672
3.469e-07
d
yr
n .08242375295543809 2.3914e-09 deg/d
Q 5.602428398717604 1.0836e-07 au
  Orbit Determination Parameters
   # obs. used (total)      891  
   data-arc span      10879 days (29.79 yr)  
   first obs. used      1991-04-08  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5738  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-23 19:28:38  

Additional Information
 Earth MOID = 3.87994 au 
 Jupiter MOID = .00903432 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 11.86   n/a E2021B10  

21371 (1997 TD28)          Discovered 1997-Oct-01 by Uppsala-DLR Trojan Survey at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 TD28 = 1996 RU32 = 1998 XQ1 = 2000 AG20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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