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49911 (1999 XT169)
Classification: Main-belt Asteroid          SPK-ID: 2049911
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1964362105154415 4.2159e-08  
a 2.42083182414142 7.8414e-09 au
q 1.945292794311895 1.0217e-07 au
i 4.908862842706565 4.1069e-06 deg
node 44.25678252161417 5.877e-05 deg
peri 76.63661935733657 6.0004e-05 deg
M 31.92416334234923 1.0919e-05 deg
tp 2458478.499283785272
(2018-Dec-25.99928379)
4.1701e-05 TDB
period 1375.768485028375
3.77
6.6845e-06
1.83e-08
d
yr
n .2616719338447231 1.2714e-09 deg/d
Q 2.896370853970944 9.3818e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1428  
   data-arc span      11018 days (30.17 yr)  
   first obs. used      1989-03-10  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49505  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:41:36  

Additional Information
 Earth MOID = .968469 au 
 Jupiter MOID = 2.20408 au 
 T_jup = 3.482 
[ 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 14.4   n/a MPO474380  
diameter diameter 4.356 km 0.230 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.208   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49911 (1999 XT169)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XT169 = 1989 ER1 = 1993 GS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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