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JPL Small-Body Database Browser
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91584 (1999 SQ20)
Classification: Main-belt Asteroid          SPK-ID: 2091584
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2547737626433804 5.4554e-08  
a 2.77193839276979 2.1811e-08 au
q 2.065721218628187 1.528e-07 au
i 15.98420278543025 5.1427e-06 deg
node 61.61066928587373 2.0968e-05 deg
peri 247.2807947645554 2.2408e-05 deg
M 215.4740234447644 9.3541e-06 deg
tp 2459677.232757587731
(2022-Apr-07.73275759)
4.7104e-05 TDB
period 1685.674773063887
4.62
1.9895e-05
5.447e-08
d
yr
n .2135643279193548 2.5206e-09 deg/d
Q 3.478155566911394 2.7368e-08 au
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      7927 days (21.70 yr)  
   first obs. used      1998-04-23  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57576  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 14:03:54  

Additional Information
 Earth MOID = 1.10924 au 
 Jupiter MOID = 1.97301 au 
 T_jup = 3.234 
[ 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 14.6   n/a MPO502691  

91584 (1999 SQ20)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 SQ20 = 1998 HU111 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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