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11474 (1982 SM2)
Classification: Main-belt Asteroid          SPK-ID: 2011474
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1955997790293303 4.369e-08  
a 2.276021000137246 6.2296e-09 au
q 1.830831795444285 9.6747e-08 au
i 5.406521219258569 3.3643e-06 deg
node 348.5316353978034 3.5205e-05 deg
peri 355.4835852691946 3.6453e-05 deg
M 60.68097471760684 1.1823e-05 deg
tp 2458989.096160044359
(2020-May-19.59616004)
4.066e-05 TDB
period 1254.188528417764
3.43
5.1492e-06
1.41e-08
d
yr
n .287038185921029 1.1785e-09 deg/d
Q 2.721210204830206 7.4481e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2007  
   data-arc span      14038 days (38.43 yr)  
   first obs. used      1982-09-18  
   last obs. used      2021-02-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47978  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:47:36  

Additional Information
 Earth MOID = .821503 au 
 Jupiter MOID = 2.68496 au 
 T_jup = 3.578 
[ 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 14.77   n/a E2021B10  
rotation period rot_per 1917.221 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

11474 (1982 SM2)          Discovered 1982-Sep-18 by Debehogne, H. at La Silla
Reference: 19990928/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1982 SM2 = 1995 KD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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