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74854 (1999 TT78)
Classification: Main-belt Asteroid          SPK-ID: 2074854
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1409419367269141 3.4805e-08  
a 2.389848866916274 9.0365e-09 au
q 2.053018939128473 8.377e-08 au
i 2.12708393493787 3.6465e-06 deg
node 46.04096260995459 0.00010924 deg
peri 182.1112396879625 0.00011044 deg
M 344.8114129699881 1.5561e-05 deg
tp 2459057.433640657578
(2020-Jul-26.93364066)
5.8283e-05 TDB
period 1349.44156399991
3.69
7.6538e-06
2.095e-08
d
yr
n .2667770206609881 1.5131e-09 deg/d
Q 2.726678794704074 1.031e-08 au
  Orbit Determination Parameters
   # obs. used (total)      755  
   data-arc span      9626 days (26.35 yr)  
   first obs. used      1994-03-05  
   last obs. used      2020-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:42:05  

Additional Information
 Earth MOID = 1.04305 au 
 Jupiter MOID = 2.25666 au 
 T_jup = 3.518 
[ 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 16.1   n/a MPO379111  

74854 (1999 TT78)          Discovered 1999-Oct-11 by Spacewatch at Kitt Peak
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1925-Jun-23 22:29 < 00:01 Amphi 0.035521816099283 0.0355030973042551 0.0355405363383656 3.9882793749948 3.98827933441665 2424325.436622041 0.814342875519337 999.092901813704 60.7605533749065 -21.0095268256281 31728.472341718 T 19 CATAB v2.0f-lin.ifort 2020-Nov-12 21:42:07 2020-Nov-12 21:42

Alternate Designations
 1999 TT78 = 1998 KF57 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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