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181911 (1999 TQ39)
Classification: Main-belt Asteroid          SPK-ID: 2181911
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766425205675375 5.7992e-08  
a 3.129523356983378 3.4828e-08 au
q 2.576716463030853 1.904e-07 au
i 11.3022917527255 5.2097e-06 deg
node 87.46685679101843 2.8421e-05 deg
peri 291.7755476522402 3.2727e-05 deg
M 311.9348313162882 2.2827e-05 deg
tp 2459470.487521930092
(2021-Sep-12.98752193)
0.00013172 TDB
period 2022.160965135039
5.54
3.3757e-05
9.242e-08
d
yr
n .1780273708210758 2.9719e-09 deg/d
Q 3.682330250935903 4.098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      418  
   data-arc span      7562 days (20.70 yr)  
   first obs. used      1999-10-02  
   last obs. used      2020-06-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5396  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:33  

Additional Information
 Earth MOID = 1.60513 au 
 Jupiter MOID = 1.88232 au 
 T_jup = 3.160 
[ 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 14.85   n/a E2021B55  
diameter diameter 3.895 km 0.299 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

181911 (1999 TQ39)          Discovered 1999-Oct-03 by CSS at Catalina
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 TQ39 = 2004 RE278 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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