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JPL Small-Body Database Browser
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109479 (2001 QR221)
Classification: Main-belt Asteroid          SPK-ID: 2109479
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1595203936035083 5.4733e-08  
a 2.586477498395916 2.0492e-08 au
q 2.173881589805182 1.4672e-07 au
i 13.34213532355283 6.9791e-06 deg
node 181.4656041545909 1.819e-05 deg
peri 236.2902518405715 2.6879e-05 deg
M 10.13859351776268 1.8895e-05 deg
tp 2458557.710550979616
(2019-Mar-15.21055098)
7.9608e-05 TDB
period 1519.362781469659
4.16
1.8056e-05
4.943e-08
d
yr
n .2369414364960138 2.8158e-09 deg/d
Q 2.999073406986651 2.3761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      10681 days (29.24 yr)  
   first obs. used      1989-10-07  
   last obs. used      2019-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51858  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:12:56  

Additional Information
 Earth MOID = 1.21299 au 
 Jupiter MOID = 2.48532 au 
 T_jup = 3.366 
[ 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 15.4   n/a MPO412772  

109479 (2001 QR221)          Discovered 2001-Aug-24 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 2001 QR221 = 1989 TL5 = 1993 RJ19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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