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7521 (1990 QS2)
Classification: Main-belt Asteroid          SPK-ID: 2007521
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .009051018088680345 5.7196e-08  
a 2.900511565515222 1.9651e-08 au
q 2.874258982869317 1.6607e-07 au
i 2.649434699610664 5.0815e-06 deg
node 143.2677180704586 0.00013097 deg
peri 15.27359401733597 0.00032989 deg
M 282.1114922611848 0.00030299 deg
tp 2457990.874293878343
(2017-Aug-25.37429388)
0.0015188 JED
period 1804.306564293939
4.94
1.8336e-05
5.02e-08
d
yr
n .1995226349691163 2.0276e-09 deg/d
Q 2.926764148161126 1.9829e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1376  
   data-arc span      12008 days (32.88 yr)  
   first obs. used      1983-04-16  
   last obs. used      2016-03-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5136  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:56:46  

Additional Information
 Earth MOID = 1.87911 au 
 Jupiter MOID = 2.03486 au 
 T_jup = 3.286 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a MPO267738  

7521 (1990 QS2)          Discovered 1990-Aug-24 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1990 QS2 = 1983 HQ1 = 1985 SB4 = 1986 WC7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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