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74899 (1999 TQ123)
Classification: Main-belt Asteroid          SPK-ID: 2074899
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17373633149538 4.2767e-08  
a 2.365376845961427 9.8083e-09 au
q 1.954424950139976 1.0388e-07 au
i 5.552567806146965 4.2993e-06 deg
node 44.90820918726101 4.5651e-05 deg
peri 336.8576479479787 4.6949e-05 deg
M 240.9358663956849 1.2652e-05 deg
tp 2459439.968138495096
(2021-Aug-13.46813849)
4.8081e-05 TDB
period 1328.767321181773
3.64
8.2648e-06
2.263e-08
d
yr
n .270927794702104 1.6851e-09 deg/d
Q 2.776328741782878 1.1512e-08 au
  Orbit Determination Parameters
   # obs. used (total)      995  
   data-arc span      8553 days (23.42 yr)  
   first obs. used      1997-01-14  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53238  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:51:07  

Additional Information
 Earth MOID = .959174 au 
 Jupiter MOID = 2.67949 au 
 T_jup = 3.522 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456980.5 (2014-Nov-19.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1724550702320446 4.2566e-08  
q 1.957738982483062 1.0312e-07 au
tp 2456782.580056898464
(2014-May-05.08005690)
4.2628e-05 TDB
node 44.99109476639558 4.5681e-05 deg
peri 336.8580554606245 4.7011e-05 deg
i 5.550334570936633 4.2957e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      995  
   data-arc span      8553 days (23.42 yr)  
   first obs. used      1997-01-14  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53238  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:51:07  

Additional Information
 Jupiter MOID = 2.67949 au 
 T_jup = 3.522 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.811859277454605E-15 -4.376910123210655E-15 -4.930238242895279E-13 2.361024413095964E-15 -1.652080222743118E-13 -5.278047337287895E-16
q -4.376910123210655E-15 1.063445676764675E-14 1.229445592429491E-12 -4.664749513824477E-15 4.091833853495773E-13 1.415495188694883E-15
tp -4.930238242895279E-13 1.229445592429491E-12 1.817155424355534E-9 1.4938363152592E-11 4.938783867512882E-10 -5.22390503930224E-13
node 2.361024413095964E-15 -4.664749513824477E-15 1.4938363152592E-11 2.086759699730995E-9 -2.072497029067947E-9 -6.017468048909601E-11
peri -1.652080222743118E-13 4.091833853495773E-13 4.938783867512882E-10 -2.072497029067947E-9 2.210065697546339E-9 5.972278833680062E-11
i -5.278047337287895E-16 1.415495188694883E-15 -5.22390503930224E-13 -6.017468048909601E-11 5.972278833680062E-11 1.845267197543941E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO468697  
diameter diameter 1.941 km 0.260 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.356   0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74899 (1999 TQ123)          Discovered 1999-Oct-04 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 TQ123 = 1997 AJ17 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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