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181718 (1994 ST8)
Classification: Main-belt Asteroid          SPK-ID: 2181718
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1847392518984352 6.2305e-08  
a 2.587362974530269 1.3133e-08 au
q 2.109375474225837 1.6652e-07 au
i 1.596285575100453 6.3366e-06 deg
node 182.6373760754624 0.00013495 deg
peri 230.349810433476 0.00013674 deg
M 74.83165002948417 1.8594e-05 deg
tp 2458884.514403913734
(2020-Feb-05.01440391)
7.7361e-05 TDB
period 1520.143075105729
4.16
1.1574e-05
3.169e-08
d
yr
n .2368198138026984 1.8031e-09 deg/d
Q 3.065350474834701 1.5559e-08 au
  Orbit Determination Parameters
   # obs. used (total)      466  
   data-arc span      9690 days (26.53 yr)  
   first obs. used      1994-09-28  
   last obs. used      2021-04-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55374  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:09:46  

Additional Information
 Earth MOID = 1.12011 au 
 Jupiter MOID = 2.29953 au 
 T_jup = 3.397 
[ 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 16.78   n/a MPCxxxxx  

181718 (1994 ST8)          Discovered 1994-Sep-28 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

Alternate Designations
 1994 ST8 = 2004 BW12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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