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49774 (1999 WT9)
Classification: Main-belt Asteroid          SPK-ID: 2049774
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 .1034949613813117 4.2195e-08  
a 2.308872266721252 1.1294e-08 au
q 2.069915620642555 9.8295e-08 au
i 7.049094109882945 4.577e-06 deg
node 74.8657557198764 3.9951e-05 deg
peri 24.75223149008454 4.8052e-05 deg
M 292.4453870369429 2.976e-05 deg
tp 2459240.964404156768
(2021-Jan-26.46440416)
0.0001068 TDB
period 1281.440033470054
3.51
9.4025e-06
2.574e-08
d
yr
n .2809339419692892 2.0613e-09 deg/d
Q 2.54782891279995 1.2463e-08 au
  Orbit Determination Parameters
   # obs. used (total)      729  
   data-arc span      9641 days (26.40 yr)  
   first obs. used      1994-06-03  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .548  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:57  

Additional Information
 Earth MOID = 1.08894 au 
 Jupiter MOID = 2.58728 au 
 T_jup = 3.569 
[ 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 15.4   n/a MPO436131  

49774 (1999 WT9)          Discovered 1999-Nov-30 by Kobayashi, T. at Oizumi
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 WT9 = 1994 LD7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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