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8162 (1990 SK11)
Classification: Main-belt Asteroid          SPK-ID: 2008162
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1094257697012081 3.4953e-08  
a 2.258979477611173 6.8141e-09 au
q 2.011788909534338 7.9695e-08 au
i 2.418336103239017 3.2367e-06 deg
node 270.9623890779263 9.4632e-05 deg
peri 107.4564630663338 9.5955e-05 deg
M 253.9996229568993 1.6422e-05 deg
tp 2459365.650386227817
(2021-May-31.15038623)
5.7037e-05 TDB
period 1240.128976037168
3.40
5.6112e-06
1.536e-08
d
yr
n .2902923864825577 1.3135e-09 deg/d
Q 2.506170045688009 7.5597e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2249  
   data-arc span      11986 days (32.82 yr)  
   first obs. used      1987-12-14  
   last obs. used      2020-10-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4813  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:22:52  

Additional Information
 Earth MOID = 1.01522 au 
 Jupiter MOID = 2.93261 au 
 T_jup = 3.612 
[ 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 14.4   n/a MPO473878  
diameter diameter 4.411 km 0.347 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.224 h n/a LCDB (Rev. 2019-August); 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.]
geometric albedo albedo 0.208   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8162 (1990 SK11)          Discovered 1990-Sep-16 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1990 SK11 = 1987 XR = 1990 QA19 = 1990 SL29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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