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74801 (1999 SN18)
Classification: Main-belt Asteroid          SPK-ID: 2074801
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2109192667029654 4.1371e-08  
a 2.227401597992622 7.9231e-09 au
q 1.757599686291005 9.2502e-08 au
i 7.422735201513816 4.82e-06 deg
node 59.46736124837555 3.2664e-05 deg
peri 264.8603475932339 3.5179e-05 deg
M 101.8157102403284 1.2783e-05 deg
tp 2458657.093499719735
(2019-Jun-22.59349972)
4.3543e-05 TDB
period 1214.21674326177
3.32
6.4787e-06
1.774e-08
d
yr
n .2964874286224437 1.582e-09 deg/d
Q 2.69720350969424 9.5943e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      9071 days (24.84 yr)  
   first obs. used      1995-03-28  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50357  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:22:11  

Additional Information
 Earth MOID = .764868 au 
 Jupiter MOID = 2.66052 au 
 T_jup = 3.604 
[ 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 15.2   n/a MPO439563  

74801 (1999 SN18)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 SN18 = 1995 FW16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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