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74806 (1999 TT)
Classification: Main-belt Asteroid          SPK-ID: 2074806
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1335271208773333 6.5932e-08  
a 2.350831030996495 9.7828e-09 au
q 2.03693133175844 1.5484e-07 au
i 7.021197750501762 7.6859e-06 deg
node 21.11209757927737 3.5241e-05 deg
peri 310.7172580627538 4.1183e-05 deg
M 296.4618205411782 2.1956e-05 deg
tp 2459232.860774407918
(2021-Jan-18.36077441)
8.057e-05 TDB
period 1316.529360761157
3.60
8.2179e-06
2.25e-08
d
yr
n .2734462373037123 1.7069e-09 deg/d
Q 2.66473073023455 1.1089e-08 au
  Orbit Determination Parameters
   # obs. used (total)      922  
   data-arc span      7714 days (21.12 yr)  
   first obs. used      1998-03-25  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52308  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:22:13  

Additional Information
 Earth MOID = 1.03526 au 
 Jupiter MOID = 2.69376 au 
 T_jup = 3.536 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO379111  
rotation period rot_per 3.70 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Incomplete or inconclusive result.
Published Reference List:
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

74806 (1999 TT)          Discovered 1999-Oct-01 by Korlevic, K. at Visnjan
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TT = 1998 HH54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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