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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07355919731495573 4.0836e-08  
a 5.193001798264862 9.5213e-08 au
q 4.811008754329377 2.5388e-07 au
i 7.752963898660977 4.4688e-06 deg
node 77.20371283363137 4.1566e-05 deg
peri 48.23842077349217 6.2254e-05 deg
M 274.6351491194437 4.9921e-05 deg
tp 2460421.450098697228
(2024-Apr-20.95009870)
0.00061815 TDB
period 4322.4117622754
11.83
0.00011888
3.255e-07
d
yr
n .08328683609968919 2.2906e-09 deg/d
Q 5.574994842200346 1.0222e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1155  
   data-arc span      10876 days (29.78 yr)  
   first obs. used      1991-05-04  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54236  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:44:08  

Additional Information
 Earth MOID = 3.83325 au 
 Jupiter MOID = .0567549 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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