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74161 (1998 QF101)
Classification: Main-belt Asteroid          SPK-ID: 2074161
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 .2170507526765579 5.4561e-08  
a 2.665312369677595 2.0492e-08 au
q 2.086804313720933 1.5347e-07 au
i 3.090574763142516 6.1975e-06 deg
node 56.78128181162188 9.148e-05 deg
peri 297.9726660474422 9.2647e-05 deg
M 354.2500268193235 1.8977e-05 deg
tp 2459025.885394529442
(2020-Jun-25.38539453)
8.401e-05 TDB
period 1589.353853216374
4.35
1.8329e-05
5.018e-08
d
yr
n .2265071426803215 2.6122e-09 deg/d
Q 3.243820425634258 2.494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      8979 days (24.58 yr)  
   first obs. used      1994-12-28  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60016  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:11:48  

Additional Information
 Earth MOID = 1.08436 au 
 Jupiter MOID = 2.20232 au 
 T_jup = 3.347 
[ 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 15.4   n/a MPO253815  
diameter diameter 4.928 km 0.266 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74161 (1998 QF101)          Discovered 1998-Aug-26 by Elst, E. W. at La Silla
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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